Question

I have an UIView. Over that Iam adding an UIImageView as subview. I want to zoom in the main view when Iam touching the UIImageview. When touch is not there, then it should zoom out. How can I do this?

Answer 1

what you do is give mainView’s tag 100, then write below code

   - (void)viewDidLoad
  {
        UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] init];
         [pinchRecognizer setDelegate:self];
        [self.view addGestureRecognizer:pinchRecognizer];
  }



  -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
     UITouch    *touch = [touches anyObject];
      if (!([touch view].tag == 100)) {




if([(UIPinchGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
    lastScale = 1.0;//lastscale is CGFLoat defiend in .h file
}

CGFloat scale = 1.0 - (lastScale - [(UIPinchGestureRecognizer*)sender scale]);

CGAffineTransform currentTransform = babyImage.transform;
CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, scale, scale);

[babyImage setTransform:newTransform];
lastScale = [(UIPinchGestureRecognizer*)sender scale];


     }
 }

let me know it is working or not!!!!!

Happy Coding!!!!!!!!!