Building a Camera Application... UIScrollView will not zoom

Question

I'm building a camera application, and I can't get the zooming on the image to work. I honestly don't know where to go from here, I'm sure it's some dumb mistake that I'm missing though. The app sets the chosenImageView to the workingImage (picture from the camera). When I try to zoom, nothing happens.

ViewController.h

@interface ViewController : UIViewController <UIActionSheetDelegate, UIImagePickerControllerDelegate, UIScrollViewDelegate>

@property (strong, nonatomic) UIImage *workingImage;
@property (weak, nonatomic) IBOutlet UIImageView *chosenImageView;
@property (weak, nonatomic) IBOutlet UIScrollView *imageScroller;

-(IBAction)cameraButtonPressed;

@end

ViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.imageScroller.minimumZoomScale = 0.01f;
    self.imageScroller.maximumZoomScale = 6.0f;
    self.imageScroller.contentSize = self.imageScroller.frame.size;
    self.imageScroller.scrollEnabled = YES;

    self.navigationController.navigationBar.tintColor = [UIColor blackColor];

}

-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
    return self.chosenImageView;
}

Answer 1

Here was the problem. You have to control+drag from the UIScrollView to the View Controller to set the delegate.