标签：style blog color io os ar for sp div
看舞台剧时当需要更改舞台背景时，舞台大幕会缓缓合上，然后缓缓打开，舞台上的内容就变了。
转场动画的意义就类似于舞台大幕，当layer上的内容变化时，我们希望通过一种动画的效果来切换，CoreAnimation提供了CATransition实现转场效果。
- (void)viewDidLoad { [super viewDidLoad]; UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 120, 120)]; imageView.image = [UIImage imageNamed:@"5.png"]; [self.view addSubview:imageView]; UIImageView *imageView2 = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 120, 120)]; imageView2.image = [UIImage imageNamed:@"4.png"]; [self.view addSubview:imageView2]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { CATransition *transition = [CATransition animation]; transition.type = kCATransitionMoveIn; transition.subtype = kCATransitionFromLeft;
transition.duration = 1;
[self.view.layer addAnimation:transition forKey:nil]; [self.view exchangeSubviewAtIndex:2 withSubviewAtIndex:3]; }
CATransition中又两个关键参数需要设置：type和subtype，前者控制转场动画的类型，后者控制转场动画的方向
type支持以下取值
kCATransitionFade 渐隐效果
kCATransitionMoveIn 移入效果
kCATransitionPush 推入效果
kCATransitionReveal 揭开效果
除了上面四种值，type还支持以下的私有动画
cube 立方体旋转
suckEffect 被吸入效果
oglFlip 翻转
rippleEffect 水波动画
pageCurl 页面揭开
pageUnCurl 页面放下
cameraIrisHollowOpen 镜头打开
cameraIrisHollowClose 镜头关闭
subtype提供四个动画方向，支持以下取值
kCATransitionFromRight
kCATransitionFromLeft
kCATransitionFromTop
kCATransitionFromBottom
此外，也可以通过UIView的beginAnimation:context:和commitAnimation实现转场动画
- (void)viewDidLoad { [super viewDidLoad]; UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 120, 120)]; imageView.image = [UIImage imageNamed:@"5.png"]; [self.view addSubview:imageView]; UIImageView *imageView2 = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 120, 120)]; imageView2.image = [UIImage imageNamed:@"4.png"]; [self.view addSubview:imageView2]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.5]; [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:YES]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; [self.view exchangeSubviewAtIndex:2 withSubviewAtIndex:3]; [UIView commitAnimations]; }
setAniamtionTransition支持以下属性
UIViewAnimationTransitionNone 无动画
UIViewAnimationTransitionFlipFromLeft 从左边滑入
UIViewAnimationTransitionFlipFromRight 从右边滑入
UIViewAnimationTransitionCurlUp 翻开书页
UIViewAnimationTransitionCurlDown 放下书页
setAniamtionCurve支持以下属性
UIViewAnimationCurveEaseInOut // slow at beginning and end
UIViewAnimationCurveEaseIn // slow at beginning
UIViewAnimationCurveEaseOut // slow at end
UIViewAnimationCurveLinear
标签：style blog color io os ar for sp div
原文地址：http://www.cnblogs.com/zanglitao/p/4047978.html
