在小程序中实现导航栏设置更多内容，可以通过以下几种方式实现：

1. 使用原生导航栏自定义按钮

javascript

// app.json 或页面.json中配置
{"navigationBarTitleText": "首页","navigationBarTextStyle": "black","navigationBarBackgroundColor": "#ffffff","navigationStyle": "default","enablePullDownRefresh": false,"navigationBarRightButton": {"text": "更多","iconPath": "path/to/icon.png","disable": false}
}

2. 自定义导航栏

在页面配置中设置 "navigationStyle": "custom"
在页面顶部添加自定义导航栏组件

html

<!-- wxml -->
<view class="custom-nav"><view class="nav-left">返回</view><view class="nav-title">页面标题</view><view class="nav-right" bindtap="showMore">更多</view>
</view><view class="more-menu" wx:if="{{showMenu}}"><view>选项1</view><view>选项2</view><view>选项3</view>
</view>

javascript

// js
Page({data: {showMenu: false},showMore() {this.setData({showMenu: !this.data.showMenu})}
})

css

/* wxss */
.custom-nav {display: flex;justify-content: space-between;align-items: center;height: 44px;padding: 0 15px;background-color: #fff;position: fixed;top: 0;left: 0;right: 0;z-index: 100;
}.more-menu {position: absolute;right: 10px;top: 44px;background: #fff;box-shadow: 0 0 10px rgba(0,0,0,0.1);border-radius: 4px;z-index: 101;
}

3. 使用小程序组件库

许多UI组件库提供了现成的导航栏组件，如：

WeUI
Vant Weapp
MinUI

4. 下拉菜单实现更多内容

html

<view class="container"><view class="dropdown"><view class="dropdown-toggle" bindtap="toggleDropdown">更多选项<image src="/images/arrow-down.png" class="{{isOpen ? 'rotate' : ''}}"></image></view><view class="dropdown-menu" wx:if="{{isOpen}}"><view class="dropdown-item" bindtap="selectItem" data-value="1">选项1</view><view class="dropdown-item" bindtap="selectItem" data-value="2">选项2</view><view class="dropdown-item" bindtap="selectItem" data-value="3">选项3</view></view></view>
</view>