导航控制器和导航工具栏

导航控制器

• UINAvigationController与UIViewController的关系

UIViewController是什么？

1. 它是一个普通的视图控制器，负责管理一个页面

UINavigationController是什么？

1. 它是一个容器控制器，专门用来管理一组UIviewController的堆栈结构

UINavigationController是iOS中用于管理一系列视图控制器（UIViewController）的容器控制器

它提供了：

1. 层级导航：类似于网页中的前进、后退
2. 导航栏：顶部的标题区域，包含返回按钮、标题、右边的按钮
3. push/pop动画

他们之间的关系？

1. UINavigationController是一个特殊的UIViewController，内部维护了一个控制器栈

• 在创建一个UIViewController子类的时候，系统会自动声明一个只读的UINavigationController属性

导航控制器：UINavigationController

导航栏：navigationBar

导航栏引入项：UINavigationItem

导航栈：viewControllers

在导航控制器中也控制一个视图控制器，每个视图控制器中对应一个导航引入项，导航引入项就是显示在导航栏上的内容，包括leftBarButton（导航栏左侧按钮）、titleView（导航栏中间标题）、rightBarButton（导航栏右侧按钮）

继承关系：NSObject -> UIrespounder -> UIViewController -> UINavigationController

• 管理多个视图的控制器（UIViewController）的栈式导航

• 提供默认的返回按钮（Back Button ）和导航栏 （UINavigationBar）

• 初始化并设置根视图控制器

//创建视图控制器
VCRoot* rootVC = [[VCRoot alloc] init];
//将视图控制器赋给导航控制器
UINavigationController* nav = [[UINavigationController alloc] initWithRootViewController:rootVC];
//将导航控制器设为窗口的根视图控制器
self.window.rootViewController = nav;

• push操作

// 在当前控制器中创建下一级控制器（例如：VCSecond）
VCSecond *secondVC = [[VCSecond alloc] init];
// 设置跳转时的过渡动画（默认 YES）
[self.navigationController pushViewController:secondVC animated:YES];

• pop操作
  1. popViewControllerAnimated:：返回上一级（当前控制器出栈）

[self.navigationController popViewControllerAnimated:YES];

​ 2. popToRootViewControllerAnimated:：直接返回根控制器（栈中所有中间控制器出栈）

[self.navigationController popToRootViewControllerAnimated:YES];

​ 3. popToViewController:animated:：返回指定的控制器（需传入控制器实例）

VCRoot *rootVC = [self.navigationController.viewControllers firstObject];
[self.navigationController popToViewController:rootVC animated:YES];

VCRoot:

#import <UIKit/UIKit.h>NS_ASSUME_NONNULL_BEGIN@interface VCRoot : UIViewController@endNS_ASSUME_NONNULL_END

#import "VCRoot.h"
#import "VCSecond.h"
@interface VCRoot ()@end@implementation VCRoot- (void)viewDidLoad {/*barStyle:导航栏风格颜色barTintColor:导航栏颜色tintColor:导航栏风格颜色toolbarItems:工具栏元素数组UIBarItemFlexibleSpace:自动调整按钮距离*/[super viewDidLoad];// Do any additional setup after loading the view.self.view.backgroundColor = [UIColor yellowColor];/*设置导航栏文字内容*/self.title = @"根视图";// 创建外观配置UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];// 设置背景图片UIImage *bgImage = [UIImage imageNamed:@"photo04.jpg"];appearance.backgroundImage = bgImage;// 隐藏阴影线//appearance.shadowImage = [UIImage new];//appearance.shadowColor = nil;// 应用外观配置self.navigationController.navigationBar.standardAppearance = appearance;self.navigationController.navigationBar.scrollEdgeAppearance = appearance;//appearance.backgroundColor = [UIColor yellowColor];//appearance.shadowImage = [UIImage new];//appearance.shadowColor = nil;/*设置导航元素项的标题，它和上一条的区别是如果没有设置navigationItem的title，为nil，系统会自动使用self.title作为标题如果两个都为nil则没有标题*/self.navigationItem.title = @"title";UIBarButtonItem* leftbutton = [[UIBarButtonItem alloc] initWithTitle:@"左侧" style:UIBarButtonItemStyleDone target:self action:@selector(pressleft)];self.navigationItem.leftBarButtonItem = leftbutton;/*UIBarButtonItem* rightbutton = [[UIBarButtonItem alloc] initWithTitle:@"右侧" style:UIBarButtonItemStyleDone target:self action:@selector(pressright)];*/UIBarButtonItem* rightbutton = [[UIBarButtonItem alloc] initWithTitle:@"进入下一级" style:UIBarButtonItemStyleDone target:self action:@selector(pressright)];self.navigationItem.rightBarButtonItem = rightbutton;UIImageView* imageview = [[UIImageView alloc] init];imageview.frame = [[UIScreen mainScreen] bounds];imageview.alpha = 1;imageview.image = [UIImage imageNamed:@"photo02.jpg"];[self.view insertSubview:imageview atIndex:0];UILabel* label = [[UILabel alloc] init];label.frame = CGRectMake(10, 10, 50, 40);label.text = @"test";label.textAlignment = NSTextAlignmentCenter;label.textColor = [UIColor blueColor];UIBarButtonItem* item3 = [[UIBarButtonItem alloc] initWithCustomView:label];NSArray* arrayofbutton = [NSArray arrayWithObjects:rightbutton,item3, nil];self.navigationItem.rightBarButtonItems = arrayofbutton;//隐藏导航栏的两个方法self.navigationController.navigationBar.hidden = NO;//继承与UIViewself.navigationController.navigationBarHidden = NO;//属性}- (void)pressleft {NSLog(@"leftbutton is pressed");
}- (void)pressright {NSLog(@"rightbutton is pressed");
}

在SceneDelegate中创建根视图与导航控制器

#import "SceneDelegate.h"
#import "VCRoot.h"
@interface SceneDelegate ()@end@implementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).self.window.frame = [UIScreen mainScreen].bounds;VCRoot* root = [[VCRoot alloc] init];UINavigationController* nav = [[UINavigationController alloc] initWithRootViewController:root];self.window.rootViewController = nav;[self.window makeKeyAndVisible];}- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
}- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call).
}- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background.
}- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state.
}@end

导航控制器切换

• navigationBar：导航栏对象
• navigationItem：导航元素项对象
• translucent：导航栏透明度
• pushViewController：推入视图控制器
• popViewController：弹出视图控制器

根视图：

#import "VCRoot.h"
#import "VCSecond.h"
@interface VCRoot ()@end@implementation VCRoot- (void)viewDidLoad {/*barStyle:导航栏风格颜色barTintColor:导航栏颜色tintColor:导航栏风格颜色toolbarItems:工具栏元素数组UIBarItemFlexibleSpace:自动调整按钮距离*/[super viewDidLoad];// Do any additional setup after loading the view.self.view.backgroundColor = [UIColor yellowColor];/*设置导航栏文字内容*/self.title = @"根视图";// 创建外观配置UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];// 设置背景图片UIImage *bgImage = [UIImage imageNamed:@"photo04.jpg"];appearance.backgroundImage = bgImage;// 隐藏阴影线//appearance.shadowImage = [UIImage new];//appearance.shadowColor = nil;// 应用外观配置self.navigationController.navigationBar.standardAppearance = appearance;self.navigationController.navigationBar.scrollEdgeAppearance = appearance;//appearance.backgroundColor = [UIColor yellowColor];//appearance.shadowImage = [UIImage new];//appearance.shadowColor = nil;/*设置导航元素项的标题，它和上一条的区别是如果没有设置navigationItem的title，为nil，系统会自动使用self.title作为标题如果两个都为nil则没有标题*/self.navigationItem.title = @"title";UIBarButtonItem* leftbutton = [[UIBarButtonItem alloc] initWithTitle:@"左侧" style:UIBarButtonItemStyleDone target:self action:@selector(pressleft)];self.navigationItem.leftBarButtonItem = leftbutton;/*UIBarButtonItem* rightbutton = [[UIBarButtonItem alloc] initWithTitle:@"右侧" style:UIBarButtonItemStyleDone target:self action:@selector(pressright)];*/UIBarButtonItem* rightbutton = [[UIBarButtonItem alloc] initWithTitle:@"进入下一级" style:UIBarButtonItemStyleDone target:self action:@selector(pressright)];self.navigationItem.rightBarButtonItem = rightbutton;UIImageView* imageview = [[UIImageView alloc] init];imageview.frame = [[UIScreen mainScreen] bounds];imageview.alpha = 1;imageview.image = [UIImage imageNamed:@"photo02.jpg"];[self.view insertSubview:imageview atIndex:0];UILabel* label = [[UILabel alloc] init];label.frame = CGRectMake(10, 10, 50, 40);label.text = @"test";label.textAlignment = NSTextAlignmentCenter;label.textColor = [UIColor blueColor];UIBarButtonItem* item3 = [[UIBarButtonItem alloc] initWithCustomView:label];NSArray* arrayofbutton = [NSArray arrayWithObjects:rightbutton,item3, nil];self.navigationItem.rightBarButtonItems = arrayofbutton;//隐藏导航栏的两个方法self.navigationController.navigationBar.hidden = NO;//继承与UIViewself.navigationController.navigationBarHidden = NO;//属性 
}- (void)pressleft {NSLog(@"leftbutton is pressed");
}- (void)pressright {VCSecond* vc2 = [[VCSecond alloc] init];[self.navigationController pushViewController:vc2 animated: YES];
}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

第二个视图

#import "VCSecond.h"
#import "VCThird.h"
@interface VCSecond ()@end@implementation VCSecond- (void)viewDidLoad {[super viewDidLoad];UIImageView* imageView = [[UIImageView alloc] init];imageView.image = [UIImage imageNamed:@"photo01.jpg"];imageView.frame = [[UIScreen mainScreen] bounds];[self.view insertSubview:imageView atIndex:0];// Do any additional setup after loading the view.//默认透明度为yes：可透明的self.navigationController.navigationBar.translucent = YES;//设置导航控制栏风格，默认为Defaultself.navigationController.navigationBar.barStyle = UIBarStyleDefault;self.title = @"视图二";self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"下一个视图" style:UIBarButtonItemStylePlain target:self action:@selector(pressright)];self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"上一个视图" style:UIBarButtonItemStylePlain target:self action:@selector(pressleft)];
}- (void)pressright {VCThird* vc3 = [[VCThird alloc] init];[self.navigationController pushViewController:vc3 animated:YES];
}- (void)pressleft {[self.navigationController popViewControllerAnimated:YES];
}
/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

第三个视图

#import "VCThird.h"
#import "VCRoot.h"
#import "VCSecond.h"
@interface VCThird ()@end@implementation VCThird- (void)viewDidLoad {[super viewDidLoad];UIImageView* imageview = [UIImageView new];imageview.frame = [[UIScreen mainScreen] bounds];imageview.image = [UIImage imageNamed:@"photo05.jpg"];[self.view insertSubview:imageview atIndex:0];// Do any additional setup after loading the view.self.navigationItem.title = @"视图三";self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"上一级页面" style:UIBarButtonItemStylePlain target:self action:@selector(pressleft)];self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"回到主页面" style:UIBarButtonItemStylePlain target:self action:@selector(pressright)];}- (void)pressleft {[self.navigationController popViewControllerAnimated:YES];
}- (void)pressright {[self.navigationController popToRootViewControllerAnimated:YES];
}
/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

SceneDelegate.m:

#import "SceneDelegate.h"
#import "VCRoot.h"
@interface SceneDelegate ()@end@implementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).self.window.frame = [UIScreen mainScreen].bounds;VCRoot* root = [[VCRoot alloc] init];UINavigationController* nav = [[UINavigationController alloc] initWithRootViewController:root];self.window.rootViewController = nav;[self.window makeKeyAndVisible];}- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
}- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call).
}- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background.
}- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state.
}@end

导航工具栏：

在OC中，设置导航栏的风格颜色等样式，只要通过UINavigationBar的属性或UINavigationBarAppearance来实现

• barStyle：导航栏风格
• barTintColor：导航栏颜色
• tintColor：导航栏风格颜色
• toolBarItems：工具栏元素数组
• UIBarItemFlexibleSpace：自动调整距离按钮

1. 设置导航栏背景颜色(通过barTintColor)

// 方式 1：直接修改当前导航栏（推荐在视图控制器中使用）
self.navigationController.navigationBar.barTintColor = [UIColor yellowColor];// 方式 2：全局设置（所有导航栏生效，推荐在 AppDelegate 中使用）
[[UINavigationBar appearance] setBarTintColor:[UIColor yellowColor]];

2. 设置导航栏标题样式（通过titleTextAttributes配置颜色、字体等）

// 方式 1：修改当前导航栏
NSDictionary *titleAttrs = @{NSForegroundColorAttributeName: [UIColor whiteColor],  // 标题颜色NSFontAttributeName: [UIFont boldSystemFontOfSize:18]  // 标题字体
};
[self.navigationController.navigationBar setTitleTextAttributes:titleAttrs];// 方式 2：全局设置
[[UINavigationBar appearance] setTitleTextAttributes:titleAttrs];

3. 设置导航栏按钮颜色（通过tintColor统一控制导航栏按钮的颜色

// 方式 1：修改当前导航栏
self.navigationController.navigationBar.tintColor = [UIColor blueColor];// 方式 2：全局设置
[[UINavigationBar appearance] setTintColor:[UIColor blueColor]];

4. 隐藏导航栏底部阴影线（默认存在一条分割线）

// 方式 1：使用 shadowImage
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:[UIImage new]];// 方式 2：iOS 13+ 推荐用 UINavigationBarAppearance
if (@available(iOS 13.0, *)) {UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];appearance.shadowColor = nil;  // 隐藏阴影线self.navigationController.navigationBar.standardAppearance = appearance;
}

• UINavigationBarAppearance可更细粒度控制导航栏样式，支持标准状态和滚动状态的差异化设置

5. 全局设置（AppleDelegate中）

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {if (@available(iOS 13.0, *)) {UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];// 1. 设置背景appearance.backgroundColor = [UIColor yellowColor];  // 背景色// 2. 设置标题appearance.titleTextAttributes = @{};// 3. 隐藏阴影线appearance.shadowColor = nil;// 4. 应用到所有导航栏UINavigationBar *navBar = [UINavigationBar appearance];navBar.standardAppearance = appearance;         // 标准状态navBar.scrollEdgeAppearance = appearance;       // 滚动到顶部时的状态}return YES;
}

6. 局部配置

- (void)viewDidLoad {[super viewDidLoad];   if (@available(iOS 13.0, *)) {UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];appearance.backgroundColor = [UIColor orangeColor];appearance.titleTextAttributes = @{NSForegroundColorAttributeName: [UIColor blackColor]};// 应用到当前导航栏self.navigationController.navigationBar.standardAppearance = appearance;self.navigationController.navigationBar.scrollEdgeAppearance = appearance;}
}

7. 自定义配置

// 在 viewDidLoad 中
UIView *customTitleView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 120, 30)];// 添加标题文字
UILabel *titleLabel = [[UILabel alloc] initWithFrame:customTitleView.bounds];
titleLabel.text = @"Custom Title";
titleLabel.font = [UIFont boldSystemFontOfSize:17];
titleLabel.textAlignment = NSTextAlignmentCenter;
[customTitleView addSubview:titleLabel];// 添加标题图片
UIImageView *titleImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
titleImageView.image = [UIImage imageNamed:@"logo"];
[customTitleView addSubview:titleImageView];// 设置到导航栏
self.navigationItem.titleView = customTitleView;

• 常见问题：

  • 导航栏颜色不生效：检查是否开启了半透明效果，需要关闭
  • 如何让导航栏延伸到状态栏？

 // 在视图控制器中self.edgesForExtendedLayout = UIRectEdgeTop;  // 视图延伸到导航栏下方self.extendedLayoutIncludesOpaqueBars = YES;  // 包含不透明的导航栏

self.edgesForExtendedLayout = UIRectEdgeTop;

1. 控制视图控制器的根视图可以延伸到屏幕的哪些边缘
2. 默认是全部，如果导航栏是半透明的，会看到视图与导航栏重合

self.extendedLayoutIncludesOpaqueBars = YES;

1. 决定延伸布局是否包含不透明的导航栏与工具栏
2. 默认NO：如果导航栏不透明，根视图会从导航栏底部开始布局

#import "VCRoot.h"
#import "SecondVC.h"@interface VCRoot ()@end@implementation VCRoot- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor = [UIColor orangeColor];self.title = @"根视图";UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithTitle: @"右侧按钮" style: UIBarButtonItemStylePlain target: self action: nil];self.navigationItem.rightBarButtonItem = btn;//UIBarAppearance是iOS13后推出的一个对相应空间设置外观样式的类，可以统一配置NavigationBar、TabBar、ToolBar等的外观样式//UINavigationBarAppearance可以设置导航栏对象的外观样式//创建一个UINavigationBarAppearance对象UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];//设置该对象的背景颜色appearance.backgroundColor = [UIColor blueColor];//创建该对象的阴影图像appearance.shadowImage = [[UIImage alloc] init];//设置该对象的阴影颜色appearance.shadowColor = nil;//设置导航栏按钮的颜色self.navigationController.navigationBar.tintColor = [UIColor purpleColor];//设置普通样式导航栏self.navigationController.navigationBar.standardAppearance = appearance;//设置滚动样式导航栏self.navigationController.navigationBar.scrollEdgeAppearance = appearance;//隐藏导航栏的两个方法//1、下面这一条的hidden是继承于UIView的self.navigationController.navigationBar.hidden = NO;//2、下面这一条的navigationBarHidden是一个属性self.navigationController.navigationBarHidden = NO;//显示工具栏对象//隐藏工具栏，默认为YES：即隐藏；NO：不隐藏self.navigationController.toolbarHidden = NO;//设置工具栏是否透明，默认为YES：半透明self.navigationController.toolbar.translucent = NO;UIBarButtonItem *btn1 = [[UIBarButtonItem alloc] initWithTitle: @"left" style: UIBarButtonItemStylePlain target: nil action: nil];UIBarButtonItem *btn2 = [[UIBarButtonItem alloc] initWithTitle: @"right" style: UIBarButtonItemStylePlain target: self action: @selector(pressBack)];//设置一个自定义类型的button,使用图片创建UIButton *btnC = [UIButton buttonWithType: UIButtonTypeCustom];[btnC setImage: [UIImage imageNamed: @"btnC.jpg"] forState: UIControlStateNormal];btnC.frame = CGRectMake(0, 0, 60, 60);UIBarButtonItem *btn3 = [[UIBarButtonItem alloc] initWithCustomView: btnC];//设置一个占位按钮，放到数组中可以用来分隔开各按钮//设置宽度固定的占位按钮,注：此处方法名为UIBarButtonSystemItemFixedSpace（FixedSpace！！！！！）UIBarButtonItem *btnF1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFixedSpace target: nil action: nil];btnF1.width = 110;//设置自动计算宽度的占位按钮，注：此处方法名为UIBarButtonSystemItemFlexibleSpace （FlexibleSpace！！！！！）UIBarButtonItem *btnF2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target: nil action: nil];NSArray *arrayBtn = [NSArray arrayWithObjects: btn1, btnF2, btn3, btnF2, btn2, nil];self.toolbarItems = arrayBtn;}- (void)pressBack {SecondVC *vc = [[SecondVC alloc] init];[self.navigationController pushViewController: vc animated: YES];
}/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

分栏控制器

分栏控制器是一种常用的容器视图控制器，分栏控制器可以包含多个子视图控制器，并通过底部的分栏菜单UIBar

进行切换

1. 在sceneDelegate中创建子视图控制器，同时创建分栏控制器对象，将子视图控制器添加到分栏控制器中

#import "SceneDelegate.h"
#import "VCFirst.h"
#import "VCSecond.h"
#import "VCThird.h"
#import "VCFourth.h"
#import "VCFifth.h"
#import "VCSixth.h"
@interface SceneDelegate ()@end@implementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {//创建三个视图控制器并更改背景颜色和标题VCFirst* vc01 = [VCFirst new];vc01.view.backgroundColor = [UIColor brownColor];vc01.title = @"视图1";VCSecond* vc02 = [VCSecond new];vc02.view.backgroundColor = [UIColor orangeColor];vc02.title = @"试图2";VCThird* vc03 = [VCThird new];vc03.view.backgroundColor = [UIColor yellowColor];vc03.title = @"视图3";VCFourth* vc04 = [VCFourth new];vc04.view.backgroundColor = [UIColor greenColor];vc04.title = @"视图4";VCFifth* vc05 = [VCFifth new];vc05.view.backgroundColor = [UIColor grayColor];vc05.title = @"视图5";VCSixth* vc06 = [VCSixth new];vc06.view.backgroundColor = [UIColor purpleColor];vc06.title = @"视图6";//创建分栏控制器对象UITabBarController* tbc = [UITabBarController new];//创建一个分栏控制器数组对象，并将所有需要被分栏控制器管理的对象添加进数组//分栏控制器的按钮的位置就取决于在数组中的存放位置NSArray* arrvc = [NSArray arrayWithObjects:vc01, vc02, vc03, nil];//将分栏控制器管理数组赋值tbc.viewControllers = arrvc;//将分栏控制器作为根视图控制哦self.window.rootViewController = tbc;//设置选中的视图控制器的索引//通过所以索引来确定打开程序的时候显示得是哪一个视图控制器tbc.selectedIndex = 2;if (tbc.selectedViewController == vc03) {NSLog(@"选中的是下标为2的视图控制器");}//设置分栏控制器透明度tbc.tabBar.translucent = NO;//设置分栏控制器背景颜色tbc.tabBar.backgroundColor = [UIColor whiteColor];//设置分栏控制器工具栏的按钮选择时的颜色tbc.tabBar.tintColor = [UIColor redColor];//注意不要忘记设置代理tbc.delegate = self;
}//以下是协议中函数的用法，其中“编辑”是指在分栏控制器中的more中通过拖动更改和交换显示和折叠的视图控制器的操作
//即将开始编辑前会调用此协议函数
- (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers {NSLog(@"编辑前");
}//即将结束前调用该协议函数
- (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {NSLog(@"即将结束前");
}//已经结束编辑时调用该协议函数
- (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {NSLog(@"%@", viewControllers);if (changed == YES) {NSLog(@"顺序发生改变");}NSLog(@"已经结束编辑");
}//选中控制器对象时调用该协议函数
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
//    if (tabBarController.viewControllers[tabBarController.selectedIndex] == viewController) {
//        NSLog(@"选中的视图索引与当前传入的视图索引相同");
//    }NSLog(@"选中控制器对象");
}- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
}- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call).
}- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background.
}- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state.
}@end

VCfirst.m文件中

#import "VCFirst.h"@interface VCFirst ()@end@implementation VCFirst- (void)viewDidLoad {[super viewDidLoad];//创建一个分栏按钮对象,传入三个参数//第一个参数表示标题文字内容//第二个参数表示显示图片//第三个参数表示对象的标记值UITabBarItem *tabBarItem = [[UITabBarItem alloc] initWithTitle: @"发现" image: nil tag: 101];self.tabBarItem = tabBarItem;
}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

VCSecond.m

#import "VCSecond.h"@interface VCSecond ()@end@implementation VCSecond- (void)viewDidLoad {[super viewDidLoad];//根据系统风格设置分栏控制器按钮，传入两个参数//第一个参数指分栏控制器的按钮风格，第二个参数是分栏控件对象的标签值UITabBarItem *tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem: UITabBarSystemItemContacts tag: 103];//为分栏按钮设置提示的标记值信息，是系统的，无法变更//按钮右上角显示的提示信息//通常用来提示未读的信息tabBarItem.badgeValue = @"22";self.tabBarItem = tabBarItem;
}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

VCThird.m

#import "VCThird.h"@interface VCThird ()@end@implementation VCThird- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.
}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

VCForth.m

#import "VCFourth.h"@interface VCFourth ()@end@implementation VCFourth- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.
}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

VCFifth.m

#import "VCFifth.h"@interface VCFifth ()@end@implementation VCFifth- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.
}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

VCSixth.m

#import "VCSixth.h"@interface VCSixth ()@end@implementation VCSixth- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.
}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

分栏控制器协议部分的内容

< UITabBarControllerDelegate>

//以下是协议中函数的用法，其中“编辑”是指在分栏控制器中的more中通过拖动更改和交换显示和折叠的视图控制器的操作
//即将开始编辑前会调用此协议函数
- (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers {NSLog(@"编辑前");
}//即将结束前调用该协议函数
- (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {NSLog(@"即将结束前");
}//已经结束编辑时调用该协议函数
- (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {NSLog(@"%@", viewControllers);if (changed == YES) {NSLog(@"顺序发生改变");}NSLog(@"已经结束编辑");
}//选中控制器对象时调用该协议函数
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
//    if (tabBarController.viewControllers[tabBarController.selectedIndex] == viewController) {
//        NSLog(@"选中的视图索引与当前传入的视图索引相同");
//    }NSLog(@"选中控制器对象");
}

UITabelView

UITabelView是UI组件中 非常重要的一个组件，在实际开发中有非常重要的作用，这里只做简单介绍，后面笔者会单独总结一下这部分的内容

在创建UITabelView这个组件的时候，首先需要继承UITabelViewDelegate,UITabelViewSource

同时需要设置两个代理：tabelView.delegate、tabelView.dataSource

在协议中必须要实现三个协议函数

1. -(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section（获取每组元素的个数）
2. numberOfSectionsInTableView（设置数据视图的组数）
3. tableView: cellForRowAtIndexPath：（创建单元格对象函数）

//
//  SceneDelegate.m
//  UITableView
//
//  Created by xiaoli pop on 2025/6/4.
//#import "SceneDelegate.h"
#import "ViewController.h"
@interface SceneDelegate ()@end@implementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {self.window.frame = [[UIScreen mainScreen] bounds];ViewController* vc = [ViewController new];UINavigationController* nav = [[UINavigationController alloc] initWithRootViewController:vc];self.window.rootViewController = nav;[self.window makeKeyAndVisible];
}- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
}- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call).
}- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background.
}- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state.
}@end

//
//  ViewController.m
//  UITableView
//
//  Created by xiaoli pop on 2025/6/4.
//#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];//创建数据视图，传入两个参数//参数一：数据视图的位置//参数二：数据视图的风格-UITableViewStylePlain：普通风格 、 UITableViewStyleGrouped：分组风格self.tableview = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStyleGrouped];//自动调整子视图大小self.tableview.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;//创建数据视图的代理对象self.tableview.delegate = self;//设置数据视图的代理源对象self.tableview.dataSource = self;//数据视图的头部视图的设定self.tableview.tableHeaderView = nil;//数据视图的尾部视图的设定self.tableview.tableFooterView = nil;[self.view addSubview:self.tableview];//创建一个可变数组self.arrayData = [[NSMutableArray alloc] init];for (int i = 'A'; i <= 'Z'; i++) {//定义小数组NSMutableArray* arraySmall = [[NSMutableArray alloc] init];for (int j = 1; j <= 5; j++) {NSString* str = [NSString stringWithFormat:@"%c%d",i,j];[arraySmall addObject:str];}//这里就相当于一个二维数组[self.arrayData addObject:arraySmall];}//当数据的数据源发生变化时，更新数据视图，重新加载数据[self.tableview reloadData];}- (void)creatButton {self.isEdit = NO;self.buttonOfEdit = [[UIBarButtonItem alloc] initWithTitle:@"编辑" style:UIBarButtonItemStylePlain target:self action:@selector(pressEdit)];self.buttonOfFinish = [[UIBarButtonItem alloc] initWithTitle:@"完成" style:UIBarButtonItemStylePlain target:self action:@selector(pressFinish)];self.buttonOfDelete = [[UIBarButtonItem alloc] initWithTitle:@"删除" style:UIBarButtonItemStylePlain target:self action:@selector(pressDelete)];self.navigationItem.rightBarButtonItem = self.buttonOfEdit;}
- (void)pressEdit {self.isEdit = YES;self.navigationItem.rightBarButtonItem = self.buttonOfFinish;[self.tableview setEditing:YES];self.navigationItem.leftBarButtonItem = self.buttonOfDelete;
}- (void)pressFinish {self.isEdit = NO;self.navigationItem.rightBarButtonItem = self.buttonOfEdit;[self.tableview setEditing:NO];self.navigationItem.leftBarButtonItem = nil;
}/*参数讲解：参数一：触发事件的表格视图对象参数二：用户对这个单元格执行的编辑类型参数三：表示当前单元格的位置，包含两个信息：section（第几组）、row（第几行）*/
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyleforRowAtIndexPath:(NSIndexPath *)indexPath {if (editingStyle == UITableViewCellEditingStyleDelete) {// 1. 先删除数据源中的数据[self.arrayData[indexPath.section] removeObjectAtIndex:indexPath.row];// 2. 更新表格视图（动画删除这一行）[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];}
}//- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
//    if (editingStyle == UITableViewCellEditingStyleInsert) {
//        // 1. 创建一个新的数据项（你可以替换成你自己的默认值）
//        NSString *newItem = @"新添加的内容";
//
//        // 2. 往数据源中插入（在指定 section 的对应位置）
//        [self.arrayData[indexPath.section] insertObject:newItem atIndex:indexPath.row];
//
//        // 3. 更新表格界面（带动画插入新行）
//        [tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
//    }
//}/*告诉表格视图每一行在处于编辑状态时，应该支持什么操作UITableViewCellEditingStyleDeleteUITableViewCellEditingStyleInsertUITableViewCellEditingStyleNone*/
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {return UITableViewCellEditingStyleDelete ;
}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {NSLog(@"选中单元格！%lu %lu", indexPath.section, indexPath.row);
}- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {NSLog(@"取消 选中单元格！%lu %lu", indexPath.section, indexPath.row);
}
//或取每组元素的个数（行数）
//必须要实现的协议函数
//程序在显示数据视图时会调用此函数
//p1：数据视图对象本身
//p2: 那一组需要的行数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {NSInteger num = [[self.arrayData objectAtIndex:section] count];return num;
}
//设定数据视图的组数，默认返回1
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {return  self.arrayData.count;
}//创建单元格函数对象
//参数一：调用函数的对象
//参数二：单元格的索引，就是上面的行数与组数
/*//单元格文字赋值cell.textLabel.text = [_arrayData[indexPath.section] objectAtIndex:indexPath.row];//设置子文字标题cell.detailTextLabel.text = @"子标题";//设置图片NSString* str = [NSString stringWithFormat:@"photo0%ld.jpg",indexPath.row];cell.imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:str]];*/
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {NSString* cellstr = @"cell";//尝试获得可复用的单元格，如果得不到就返回空/*当滚动表格时，屏幕上的单元格会离开屏幕，已经滚出屏幕的单元格不会被立刻销毁，而是存入复用迟中，当需要显示新的cell时，系统会从复用池中获取一个单元格重新使用，而不是重新创建*/UITableViewCell* cell = [self.tableview dequeueReusableCellWithIdentifier:cellstr];if (!cell) {//创建一个单元格对象//参数一：单元格样式//参数二：单元格的复用标记cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellstr];}//NSString* str = [NSString stringWithFormat:@"第%ld组，第%ld行",indexPath.section,indexPath.row];//单元格内容赋值cell.textLabel.text = self.arrayData[indexPath.section][indexPath.row];//调用创建功能按钮方法[self creatButton];return cell;
}- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {return 100;
}- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {return @"头部标题";
}- (NSString *)tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)section {return @"尾部标题";
}- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {return 40;
}- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {return 40;
}@end

照片墙案例

userInteractionEnable属性介绍：

userInteractionEnabled是UIView的一个重要属性，用于控制用户是否能与该视图及其子视图进行交互（如点击、滑动、手势等）。在照片墙案，若需要对图片进行点击查看、缩放、删除等操作，必须将相关视图的该属性设为 YES（默认值也是 YES，但某些场景下可能被意外修改）。

这个属性是属于UIView的，是BOOL类型的，决定UIView是否接受有关touch和keyBoard的相关操作，然后UIView就可以通过相应的一些方法来处理。

其次我们需要创建一个手势识别器UITapGestureRecognizer

//给每个控件添加手势
UITapGestureRecognizer* tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(press:)];//创建一个手势识别器，并且添加相应的方法
tap.numberOfTapsRequired = 1;//设置触摸次数
tap.numberOfTouchesRequired = 1;//设置触摸点个数
[iView addGestureRecognizer:tap];//添加手势识别器到view中
//触摸后实现方法函数
- (void) press:(UITapGestureRecognizer*) tap {//强制转换类型UIImageView* imageView = (UIImageView*) tap.view;//创建即将推出的视图控制器ShowImage* imageShow = [[ShowImage alloc] init];//点击的图像视图赋值imageShow.imageTag = imageView.tag;imageShow.image = imageView.image;//将控制器推出[self.navigationController pushViewController:imageShow animated:YES];
}

在SceneDelegate文件中，设置导航控制器

#import "SceneDelegate.h"
#import "VCRoot.h"
#import "VCImageShow.h"
@interface SceneDelegate ()@end@implementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {//导航控制器照片结构UINavigationController* nav = [[UINavigationController alloc] initWithRootViewController:[VCRoot new]];self.window.rootViewController = nav;[self.window makeKeyAndVisible];
}- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
}- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call).
}- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background.
}- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state.
}@end

在VCRoot中设置照片墙

#import "VCRoot.h"
#import "VCImageShow.h"
@interface VCRoot ()@end@implementation VCRoot- (void)viewDidLoad {[super viewDidLoad];self.title = @"照片墙";self.view.backgroundColor = [UIColor whiteColor];self.navigationController.navigationBar.translucent = YES;self.navigationController.navigationBar.barTintColor = [UIColor yellowColor];//创建一个滚动视图并设置位置和画布大小UIScrollView* sv = [UIScrollView new];sv.frame = CGRectMake(5, 10, 394, 852);sv.contentSize = CGSizeMake(394, 852 * 1.5);sv.showsVerticalScrollIndicator = NO;//打开交互事件sv.userInteractionEnabled = YES;//利用循环给根视图上添加照片对象for (int i = 0; i < 9; i++) {UIImage* image = [UIImage imageNamed:[NSString stringWithFormat:@"photo0%d.jpg",i + 1]];UIImageView* view = [[UIImageView alloc] initWithImage:image];view.frame = CGRectMake(10 + (i % 3) * 125, (i / 3) * 165, 110, 150);[sv addSubview:view];view.userInteractionEnabled = YES;//创建点击手势UITapGestureRecognizer* tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(pressTap:)];//单次点击tap.numberOfTapsRequired = 1;//单个手指tap.numberOfTouchesRequired = 1;[view addGestureRecognizer:tap];view.tag = 101 + i;}[self.view addSubview: sv];
}//方法3:
- (void)pressTap:(UITapGestureRecognizer* )tap {UIImageView* imageView = (UIImageView*)tap.view;VCImageShow* imageshow = [VCImageShow new];imageshow.imageTag = imageView.tag;[self.navigationController pushViewController:imageshow animated:YES];}//方法2:
//- (void)pressTap:(UITapGestureRecognizer* )tap {
//    UIImageView* imageView = (UIImageView*)tap.view;
//    //创建显示视图控制器
//    VCImageShow* imageshow = [[VCImageShow alloc] init];
//    //点击的图像视图赋值
//    //imageshow.imageView = imageView;//不可行
//    imageshow.image = imageView.image;
//    //将视图控制器推出
//    [self.navigationController pushViewController:imageshow animated:YES];
//    
//    
//}
/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

接下来需要解决如何将被点击的视图传入到展示图片的页面，这里要注意，不可以直接传视图对象，因为一个人视图对象只能有一个根视图，当我们把视图添加到新的父视图上时，会从原来的父亲视图删除掉

//
//  VCImageShow.m
//  PhotoWall
//
//  Created by xiaoli pop on 2025/6/3.
//#import "VCImageShow.h"@interface VCImageShow ()@end@implementation VCImageShow- (void)viewDidLoad {[super viewDidLoad];self.title = @"图片展示";self.imageView = [[UIImageView alloc] init];self.imageView.frame = [[UIScreen mainScreen] bounds];//方法2://self.imageView.image = self.image;//方法3:self.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"photo0%lu.jpg",(unsigned long)(self.imageTag - 100) ]];/*一个视图对象只能有一个根视图当我们把视图添加到新的父视图上时会从原来的父亲视图删除掉*/[self.view addSubview:self.imageView];}/*
#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller.
}
*/@end

• 实现效果

点击图片就会跳转一个新页面，内容就是选中的图片