Zoom not working in Custom UIScrollView - ios

Question

I have a problem with a custom class of UIScrollView that I use to hold an UIImageView inside of it.
I have another ViewController with a Main UIScrollView that I add some objects of the CustomScrollViewClass Class. I am trying to enable zooming inside this custom UIScrollvView but with no sucess!!!
Everything seems to work fine BUT I cannot zoom the UIImageView inside my object from CustomScrollViewClass! I have tried a lot of things but nothing worked by now.
//CustomScrollViewClass .h file
#import <UIKit/UIKit.h>
#interface CustomScrollViewClass : UIScrollView <UIScrollViewDelegate>
{
BOOL iPad;
BOOL iPhone5;
NSString *imageName;
UIImageView *imageView;
}
#property (nonatomic,strong) NSString *imageName;
#property (nonatomic,strong) UIImageView *imageView;
- (id)initWithImageAndFrame:(CGRect)frame imageName:(NSString*)image;
#end
This is the .m file
//CustomScrollViewClass .m file
#import "CustomScrollViewClass.h"
#implementation CustomScrollViewClass
#synthesize imageName,imageView;
- (id)initWithImageAndFrame:(CGRect)frame imageName:(NSString*)image
{
self = [super initWithFrame:frame];
if (self) {
CGRect imagef;
CGSize screenSize = [[UIScreen mainScreen] bounds].size;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
if (screenSize.height > 480.0f) {
iPhone5 = YES;
imagef = CGRectMake(0, 0, 320, 388);
} else {
iPhone5 = NO;
imagef = CGRectMake(0, 0, 320, 420);
}
iPad = NO;
} else {
iPad = YES;
iPhone5 = NO;
imagef = CGRectMake(0, 0, 768, 824);
}
self.contentSize = imagef.size;
self.maximumZoomScale = 2.0;
self.minimumZoomScale = 1.0;
self.zoomScale = 1.0;
self.userInteractionEnabled = YES;
self.multipleTouchEnabled = YES;
imageName = image;
UIImageView *imageAux = [[UIImageView alloc] initWithImage:[UIImage imageNamed:imageName]];
imageAux.frame = imagef;
imageAux.contentMode = UIViewContentModeScaleAspectFit;
imageView = imageAux;
[self addSubview:imageView];
NSLog(#"%#",imageName);
}
return self;
}
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
NSLog(#"%#",#"viewForZoomingInScrollView");
return self.imageView;
}
- (void)scrollViewDidZoom:(UIScrollView *)scrollView {
NSLog(#"%#",#"scrollViewDidZoom");
}
#end
As you can see it should work with zoom but it does not! The image appears noarmally. The part of the code I use to add custom views of it is this one (in this example I add 5 custom views in the Main UIScrollView):
//Method in MainView that I add objects from CustomScrollViewClass
-(void)PrepareScrollView
{
CGSize scrollviewc;
//Add Main ScrollView
UIScrollView *scroll = [[UIScrollView alloc] init];
if (iPad) {
scrollviewf = CGRectMake(0, 200, 768, 824);
scrollviewc = CGSizeMake((768 * 5), 824);
}
else {
if (iPhone5){
scrollviewf = CGRectMake(0, 180, 320, 388);
scrollviewc = CGSizeMake((320 * 5), 388);
} else {
scrollviewf = CGRectMake(0, 60, 320, 420);
scrollviewc = CGSizeMake((320 * 5), 420);
}
}
scroll.frame = scrollviewf;
scroll.contentSize = scrollviewc;
scroll.pagingEnabled = YES;
for (int i = 0; i < 5; i++) {
CGRect imagef;
if (iPad) {
imagef = CGRectMake((i * 768), 0, 768, 824);
} else {
if (iPhone5){
imagef = CGRectMake((i * 320), 0, 320, 388);
} else {
imagef = CGRectMake((i * 320), 0, 320, 420);
}
}
//Add Custom ScrollView with UIImageView
CustomScrollViewClass *AUX = [[ImageView alloc] initWithImageAndFrame:imagef imageName:[NSString stringWithFormat:#"%i%#",i+1,#"_pt.jpg"]];
[scroll addSubview:AUX];
}
self.scrollView = scroll;
[self.view addSubview:self.scrollView];
}