iOS 使用图片叠加做动画，类似Tom猫

//图片对象

UIImageView *speakerImageView=[[UIImageView alloc] initWithFrame:CGRectMake(15,12,29,29)];

//一个动画从执行到结束的要的时间

speakerImageView.animationDuration=0.4;

//重复次数 0 无数次

speakerImageView.animationRepeatCount=0;

speakerImageView.backgroundColor=[UIColor clearColor];

//适用

speakerImageView.contentMode=UIViewContentModeScaleAspectFit;

//动画经历图片数组（放有图片名）

speakerImageView.animationImages=[[NSArray alloc] initWithObjects:[UIImage imageNamed:@"baby_rremind_one@3x"],[UIImage imageNamed:@"baby_rremind_two@3x"],[UIImage imageNamed:@"baby_rremind_three@3x"],nil];

//开始动画

[speakerImageView startAnimating];