- (IBAction)scale:(id)sender {

CGFloat scaleOffset = 0.9;

_imageView.transform = CGAffineTransformScale(_imageView.transform, scaleOffset, scaleOffset);

}

//图片的移动

- (IBAction)move:(id)sender {

CGFloat moveOffset = 50;

_imageView.transform = CGAffineTransformTranslate(_imageView.transform, 0, moveOffset);

}

//图片的旋转

- (IBAction)rotate:(id)sender {

CGFloat rotateOffset = M_PI_4;

_imageView.transform = CGAffineTransformRotate(_imageView.transform, rotateOffset);

}