UI控件使用案例<四>

//*********动画翻转并改变View颜色- (void)changeColor:(UIView *)view{    if (view.backgroundColor==[UIColor yellowColor])    {        [UIView beginAnimations:nil context:nil];        [UIView setAnimationDuration:0.8];                [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:view cache:YES];//未起作用        [UIView commitAnimations];        view.backgroundColor = [UIColor blackColor];    }    else if (view.backgroundColor == [UIColor blackColor])    {        [UIView beginAnimations:nil context:nil];        [UIView setAnimationDuration:0.8];        [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:view cache:YES];        [UIView commitAnimations];        view.backgroundColor = [UIColor yellowColor];    }}