我想要通过UIPinchGestureRecognizer
来对图片操作,但是代码运行之后不是很理想,而且不能缩放
代码如下:
-(void) pinching: (UIPinchGestureRecognizer *) sender {
CGAffineTransform myTransformation =
CGAffineTransformMakeScale(sender.scale, sender.scale);
sender.view.transform = myTransformation;
}
- (void)viewDidLoad
{
UIPinchGestureRecognizer *pinch =
[[UIPinchGestureRecognizer alloc]
initWithTarget:self
action:@selector(pinching:)];
pinch.delegate = self;
[imageBG addGestureRecognizer:pinch];
[imageBG setUserInteractionEnabled:YES];
[imageBG setMultipleTouchEnabled:YES];
}