const systemInfo = wx.getSystemInfoSync();

        console.log('systemInfo', systemInfo)

        this.globalData.StatusBar = systemInfo.statusBarHeight;

        let custom = wx.getMenuButtonBoundingClientRect(); //获取胶囊的信息，使用胶囊的top,height

        if (custom) {

            this.globalData.Custom = custom;

            // this.globalData.CustomBar = custom.height + (custom.top - systemInfo.statusBarHeight) * 2 + systemInfo.statusBarHeight;

            this.globalData.CustomBar = custom.bottom + custom.top - systemInfo.statusBarHeight;

        } else {

            this.globalData.CustomBar = e.statusBarHeight + 44;

        }

上面是app.js中onLaunch里的，但这样还是不行，偶尔还是会在IOS下出现问题。