bwj_wechat/app.js

// app.js
App({
  onLaunch() {
    /* 计算tabbar+iphone安全距离  tabbar页面+100rpx*/
    let safeAreaBottom = 0,
      capsule = wx.getMenuButtonBoundingClientRect(),
      height = 200,
      that = this;

    wx.getSystemInfo({
      success(res) {
        //计算底部安全距离高度
        safeAreaBottom += res.screenHeight - res.safeArea.height;
        //计算自定义导航的高度
        height = capsule.height + res.statusBarHeight + (capsule.top - res.statusBarHeight) + 8;
        that.globalData.safeAreaBottom = safeAreaBottom;
        //判断是否为平板
        if (res.model.slice(0, 4) == "iPad") return that.globalData.myNavBorHeight = height;
        that.globalData.myNavBorHeight = height * 2;
      }
    })
    //返回数据

  },
  globalData: {
    myNavBorHeight: null, //自定义头部导航高度
    safeAreaBottom: 0, //底部安全距离
    accountList: [], //角色列表
  }
})