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];
    
}