private async Task AnimateItem(View uiElement, uint duration ){
while (_animate) {
await uiElement.ScaleTo(1.05, duration, Easing.SinInOut);
await Task.WhenAll (
uiElement.FadeTo(1, duration, Easing.SinInOut),
uiElement.LayoutTo (new Rectangle( new Point(0,0), new Size( uiElement.Width, uiElement.Height))),
uiElement.FadeTo(.9, duration, Easing.SinInOut),
uiElement.ScaleTo(1.15, duration, Easing.SinInOut)
);
}
}
private async Task Animate(Xamarin.Forms.View view, bool isCurrent)
{
//if (isCurrent)
view.IsVisible = true;
Rectangle beginRect = Rectangle.Zero;
Rectangle endRect = Rectangle.Zero;
//设置起始和终止值
beginRect = setbeginRect(isCurrent, _Direct);
endRect = setendRect(isCurrent, _Direct);
view.Layout(beginRect);
await view.LayoutTo(endRect, easing : Easing.Linear)
.ContinueWith(t =>
{
// BUG 会使填充失效
view.IsVisible = isCurrent;
}, TaskScheduler.FromCurrentSynchronizationContext());
}