在OnSizeAllocated之后-Xamarin表单

Question

我想获取放置在xaml中的控件的宽度和高度，我们将在OnSizeAllocated事件期间请求高度和宽度，是否有任何事件会在OnSizeAllocated之后触发？这样我可以获得控件的确切高度和宽度吗？

 protected override void OnSizeAllocated(double width, double height)
    {
        base.OnSizeAllocated(width, height);
        SelectedSideImage.WidthRequest = width - (width * 10 / 100);
        SelectedSideImage.HeightRequest = height - (height * 50 / 100); 
    }