UIImageView旋转任意角度－－－实现方法

 

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

-(UIImageView *) makeRotation:(UIImageView *)image speedX:(float)X speedY:(float)Y
{

//    头文件中需要定义 PI
//    #define PI 3.14159265358979323846264338327950288

    if (Y<0) {
        image.transform = CGAffineTransformMakeRotation(atan(X/(-Y)));
    }else if(Y>0){
        image.transform = CGAffineTransformMakeRotation(atanf(X/(-Y))-PI);
    }
    return image;
}