使用动画块从中心缩放UIImageView

[UIView animateWithDuration:0.5 
                      delay:0
                    options:UIViewAnimationOptionBeginFromCurrentState
                 animations:(void (^)(void)) ^{
                     myImageView.transform=CGAffineTransformMakeScale(1.2, 1.2);
                 }
                 completion:^(BOOL finished){
                     myImageView.transform=CGAffineTransformIdentity;
                 }];

[UIView animateWithDuration:2
   animations:^{
       float zoomScal = 5; //want 5x zoom
       CGPoint CenterPoint = CGPointMake(200, 300); // want center point to this
       imgArtifactImage.frame = CGRectMake(- CenterPoint.x * (zoomScal-1),- CenterPoint.y * (zoomScal-1),self.view.frame.size.width * zoomScal,self.view.frame.size.height * zoomScal);
} completion:^(BOOL finished){}];

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:GROW_ANIMATION_DURATION_SECONDS];
theView.transform = CGAffineTransformMakeScale(1.2, 1.2);

[UIView commitAnimations];