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不知不觉iOS的动画系列文章已经写到第五篇了，在这里，能方便的找到我之前写的四篇关于动画的文章。
前言：CATransition 是CAAnimation的子类，最主要的用途是用来定义view reload的转场动画。使用这个集成好的类，可以几行代码就创建出不错的效果。
动图
核心代码，
CATransition * transition = [CATransition animation]; transition.type = kCATransitionFade; transition.duration = 1.0; [self.imageview.layer addAnimation:transition forKey:@"ToNext"]; self.imageview.image = nextImage;
完整的代码
要在先在Storyboard上拖拽一个imageview，并拖拽outlet
@interface ViewController ()@property (weak, nonatomic) IBOutlet UIImageView *imageview;@property (assign,nonatomic)NSInteger currentIndex;@end@implementation ViewController-(NSArray *)imagesNamesArray{ return @[@"meidui1.jpg", @"meidui2.jpg"];}- (void)viewDidLoad { [super viewDidLoad]; UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(changeToNextImage)]; self.imageview.userInteractionEnabled = true; [self.imageview addGestureRecognizer:tap]; self.currentIndex = 0;}-(void)changeToNextImage{ self.currentIndex = (self.currentIndex + 1) % 2; NSString * imageName = [[self imagesNamesArray] objectAtIndex:self.currentIndex]; UIImage * nextImage = [UIImage imageNamed:imageName]; CATransition * transition = [CATransition animation]; transition.type = kCATransitionFade; transition.duration = 1.0; [self.imageview.layer addAnimation:transition forKey:@"ToNext"]; self.imageview.image = nextImage;}动图
代码
CATransition * transition = [CATransition animation]; transition.duration = 1.0;//动画间隔 transition.type = kCATransitionMoveIn;//主要种类，决定动画效果 transition.startProgress = 0.0;//开始 transition.endProgress = 1.0;//结束 transition.subtype = kCATransitionFromRight;//次要种类，决定动画方向 transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];//时间函数 [self.imageview.layer addAnimation:transition forKey:@"ToNext"]; self.imageview.image = nextImage;
主要种类有四种
NSString * const kCATransitionFade; //消退NSString * const kCATransitionMoveIn;//移入NSString * const kCATransitionPush;//pushNSString * const kCATransitionReveal;//退出
次要种类也有四种
NSString * const kCATransitionFromRight;NSString * const kCATransitionFromLeft;NSString * const kCATransitionFromTop;NSString * const kCATransitionFromBottom;
