<!-- 自定义头部导航栏 -->
<cover-view style="height:{{statusBarHeight+navBarHeight}}px">
 <navigator open-type="navigateBack">
  <cover-image src="/UploadFiles/2021-04-02/返回.png">

wxss:


cover-view {
 width: 100%;
 position: fixed;
 z-index: 999;
}
 
cover-image {
 width: 17px;
 height: 17px;
 margin-left: 8px;
 padding-right: 20px;
 position: absolute;
 bottom: 11px;
}


json:


{
 "navigationBarTextStyle": "white",
 "navigationStyle": "custom",
 "usingComponents": {}
}


js:


//获取应用实例
const app = getApp()
 
Page({
 /**
  * 页面的初始数据
  */
 data: {
  screenHeight: app.screenHeight,//获取屏幕高度
  statusBarHeight: app.statusBarHeight,//获取状态栏高度
  navBarHeight: app.navBarHeight,//获取导航栏高度
  changeIndex: 0,
  video: [{
   id: 0,
   video: "/*视频地址*/"
  }, {
   id: 1,
   video: "/*视频地址*/"
  }, {
   id: 2,
   video: "/*视频地址*/"
  }]
 },
 //划动切换
 slide(e) {
  this.setData({
   changeIndex: e.detail.current 
  })
  console.log(e.detail.current)
 }
})


app.js


App({
 onLaunch: function() {
  // 获取系统信息 
  wx.getSystemInfo({
   success: (res) => {
    // 获取屏幕高度
    this.screenHeight = res.screenHeight
    // 获取状态栏高度
    this.statusBarHeight = res.statusBarHeight
    // 通过操作系统 确定自定义导航栏高度 
    if (res.system.substring(0, 3) == "iOS") {
     this.navBarHeight = 42
    } else {
     this.navBarHeight = 44
    }
   }
  })
 }
})


总结