iphone动画物体沿圆形轨迹移动并同时改变大小

// // RotateAnimation.h // Layer // // Created by on 12-8-23. // Copyright (c) 2012年 __MyCompanyName__. All rights reserved. // #import <UIKit/UIKit.h> //定义三个圆 enum { firstArc = 1, secondArc, thirdArc, }; @interface RotateAnimation : UIView { UIImageView *circleView1; UIImageView *circleView2; UIImageView *circleView3; } //由于此动画是圆形, 传入的frame需要设置成正方形 - (id)initWithFrame:(CGRect)frame; -(void)setRotateAnimationBackgroundColor:(UIColor *)aColor; @end