/// <summary>
/// Display a modal layer and a waiting sign in the front.
/// 显示一个半透明层和一个等待标志在最前面。半透明层的颜色可以通过UIConfig.modalLayerColor设定。
/// 等待标志的资源可以通过UIConfig.globalModalWaiting。等待标志组件会设置为屏幕大小，请内部做好关联。
/// </summary>
public void ShowModalWait()
{
if (UIConfig.globalModalWaiting != null)
{
if (_modalWaitPane == null || _modalWaitPane.isDisposed)
{
_modalWaitPane = UIPackage.CreateObjectFromURL(UIConfig.globalModalWaiting);
_modalWaitPane.SetHome(this);
}
_modalWaitPane.SetSize(this.width, this.height);
_modalWaitPane.AddRelation(this, RelationType.Size);
_modalWaitPane.Center();
AddChild(_modalWaitPane);
}
}