UIImageView旋转任意角度－－－实现方法

转自:http://blog.csdn.net/trandy/article/details/6626281

1. -(UIImageView *) makeRotation:(UIImageView *)image speedX:(float)X speedY:(float)Y
2. {
3. //    头文件中需要定义 PI
4. //    #define PI 3.14159265358979323846264338327950288
5. if (Y<0) {
6. image.transform = CGAffineTransformMakeRotation(atan(X/(-Y)));
7. }else if(Y>0){
8. image.transform = CGAffineTransformMakeRotation(atanf(X/(-Y))-PI);
9. }
10. return image;
11. }