- (UIView *)insteadView
{
if (self.toastItem.forceTop)
{
//若强制指定一定要显示在最上层,尝试选取最上层可见window
UIView *topWindow = [[UIApplication sharedApplication].windows lastObject];
if(topWindow && topWindow.isHidden==NO)
{
returntopWindow;
}
}
return [UIApplication sharedApplication].delegate.window;
}