UIPinchGestureRecognizer * pinchGesture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchGesture:)];
[redView addGestureRecognizer:pinchGesture];
[pinchGesture release];
- (void)pinchGesture:(UIPinchGestureRecognizer *)pinchGesture
{
pinchGesture.view.transform = CGAffineTransformScale(pinchGesture.view.transform, pinchGesture.scale, pinchGesture.scale);
将之前变化的比例置为 1 . .
pinchGesture.scale = 1.0;
[pinchGesture setScale:1.0];
}