小程序获取page页面各个高度

getPageHeight(){
        let systemInfo = wx.getSystemInfoSync()
        // px转换到rpx的比例
        let pxToRpxScale = 750 / systemInfo.windowWidth;
        // 状态栏的高度
        let ktxStatusHeight = systemInfo.statusBarHeight * pxToRpxScale
        // 导航栏的高度
        let navigationHeight = 44 * pxToRpxScale
        // window的高度
        let ktxWindowHeight = systemInfo.windowHeight * pxToRpxScale
        // 屏幕的高度
        let ktxScreentHeight = systemInfo.screenHeight * pxToRpxScale
        // 底部tabBar的高度
        let tabBarHeight = ktxScreentHeight - ktxStatusHeight - navigationHeight - ktxWindowHeight
    }