Zooming and Rotation an UIImageView - objective-c

Question

I would like to zoom and rotate an UIImageView. Here is my code:
#synthesize immagine, velocita, locationManager, direzione;
- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading{
double degrees = newHeading.magneticHeading;
double radians = degrees * M_PI / 180;
[UIView animateWithDuration:0.05 animations:^{
self.immagine.transform = CGAffineTransformMakeRotation(-radians);
}];
}
-(UIView *) viewForZoomingInScrollView:(UIScrollView *)scrollView {
return immagine;
}
- (void)viewDidLoad
{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate=self;
locationManager.desiredAccuracy=kCLLocationAccuracyBestForNavigation;
[scrollView setDelegate:self];
[scrollView setContentSize:CGSizeMake(320, 460)];
immagine = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"mappa1"]];
immagine.frame = CGRectMake(0, 0, 320, 460);
immagine.contentMode = UIViewContentModeScaleAspectFit;
[scrollView addSubview:immagine];
locationManager.headingFilter = kCLHeadingFilterNone;
[locationManager startUpdatingHeading];
[super viewDidLoad];
}
But when I'm zooming, the UIImageView exit from the View. Can anyone help me? Thanks in advance!

Answer 1

I have problem like this and these two function will solve your problem
- (void)twoFingerPinch:(UIPinchGestureRecognizer *)recognizer
{
CGRect originalFrame=recognizer.view.frame;
CGRect newFrame=CGRectMake(originalFrame.origin.x, originalFrame.origin.y, originalFrame.size.width*recognizer.scale, originalFrame.size.height*recognizer.scale);
if (newFrame.size.width>70&&newFrame.size.width<150)
{
recognizer.view.frame=newFrame;
}
}
- (void)twoFingersRotate:(UIRotationGestureRecognizer *)recognizer
{
[self.view bringSubviewToFront:[(UIRotationGestureRecognizer*)recognizer view]];
if([(UIRotationGestureRecognizer*)recognizer state] == UIGestureRecognizerStateEnded) {
lastRotation = 0.0;
return;
}
CGFloat rotation = 0.0 - (lastRotation - [(UIRotationGestureRecognizer*)recognizer rotation]);
CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)recognizer view].transform;
CGAffineTransform newTransform = CGAffineTransformRotate(currentTransform,rotation);
[[(UIRotationGestureRecognizer*)recognizer view] setTransform:newTransform];
lastRotation = [(UIRotationGestureRecognizer*)recognizer rotation];
// recognizer.view.transform=CGAffineTransformMakeRotation(([recognizer rotation] * 180) / M_PI);
}