IOS 7 zooming is not working in a scroll view - ios

Question

I am building a ViewController just to show one image. I added the ImageView programmatically to a scroll view. I would like to allow the user to zoom in and out. This is my code
#interface ImageViewerViewController ()<UIScrollViewDelegate>
#property (nonatomic, strong) UIImageView *ImageView;
#property (weak, nonatomic) IBOutlet UIScrollView *Scroll;
#end
#implementation ImageViewerViewController
-(UIView*) viewForZoomingInScrollView{
return self.ImageView;
}
-(void) viewDidLoad{
self.Scroll.minimumZoomScale = 0.2;
self.Scroll.maximumZoomScale = 1.5;
self.Scroll.delegate = self;
NSLog(#"View did load");
if(self.imageName)
[self updateImage];
}
-(void)setImageName:(NSString *)imageName{
NSLog(#"set Image");
_imageName = imageName;
}
-(void)updateImage{
self.ImageView =[[UIImageView alloc]init];
self.ImageView.image = [UIImage imageNamed:self.imageName];
[self.ImageView sizeToFit];
self.Scroll.contentSize = self.imageName? self.ImageView.image.size: CGSizeZero;
[self.Scroll addSubview:self.ImageView];
}
#end
As you see, I already set the delegate of the scroll to self and I added the protocol header and the needed message.
But the zooming feature is not working.
Could you help me please?
I appreciate your time and efforts.
Regards,

Answer 1

This will work as I created a demo of it. If anything do else let me know.
-(void)viewDidLoad
{
float minimumScale = [_floorPlanImageView frame].size.width /[_floorPlanScrollView frame].size.width;
_floorPlanScrollView.maximumZoomScale = 5; //Change as per you need
_floorPlanScrollView.minimumZoomScale = minimumScale; //Change as you need
_floorPlanScrollView.zoomScale = minimumScale;
_floorPlanScrollView.delegate =self;
_floorPlanScrollView.clipsToBounds = YES;
}
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return _floorPlanImageView;
}