//清屏 public void Clean(Action onFinish) { TimedTask.createTask((task) => { TranslationY -= Opacity / Height * 20; Opacity -= 0.025f; if (Opacity <= 0 || Text == "") { Opacity = 1; TranslationY = 0; Text = ""; onFinish(); task.Stop(); } }, 0.01, true).Start(); }