Getting index in NSMutableArray of selected or tapped image - iphone

Question

I am developing an app where I add images to an NSMutableArray and display them in an image view.
My problem is that I will don't know how to get the index of the selected or tapped image in my app.
FrontsCards=[[NSMutableArray alloc]initWithObjects:#"cloub1.png",#"cloub2.png",#"cloub3.png",#"cloub4.png", nil];
for(int m=0; m< [FrontsCards count];m++)
{
NSString *imageName=[FrontsCards objectAtIndex:m];
NSString *fullImageName=[NSString stringWithFormat:#"%#",imageName];
int padding=25;
CGRect imageViewFrame=CGRectMake(scrollView.frame.size.width*m+padding, scrollView.frame.origin.y, scrollView.frame.size.width-2*padding, scrollView.frame.size.height);
ImgView=[[UIImageView alloc]initWithFrame:imageViewFrame];
[ImgView setImage:[UIImage imageNamed:fullImageName]];
[ImgView setContentMode:UIViewContentModeScaleAspectFill];
[scrollView addSubview:ImgView];
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(doubleTapImgView:)];
doubleTap.numberOfTapsRequired = 2;
doubleTap.delegate = self;
[self.ImgView addGestureRecognizer:doubleTap];
self.ImgView.userInteractionEnabled=YES;
}
CGSize scrollViewSize=CGSizeMake(scrollView.frame.size.width*[FrontsCards count], scrollView.frame.size.height);
[scrollView setContentSize:scrollViewSize];
[self.view addSubview:scrollView];
What should I do in my tap gesture recognizer to get the index of the image?
- (void)doubleTapImgView:(UITapGestureRecognizer *)gesture
{
NSLog(#"double-tap");
}

Answer 1

set a tag to each imageView you using like this :
ImgView=[[UIImageView alloc]initWithFrame:imageViewFrame];
ImgView.tag = m;
and then replace this method:
- (void)doubleTapImgView:(UITapGestureRecognizer *)gesture
{
NSLog(#"double-tap");
NSLog(#"%d", gesture.view.tag);
}
it will print you the index of the image in the imageView

Answer 2

maybe you can use something like this:
first add the name of the image as the accessibilityIdentifier of the the imageview
[imgView setAccessibilityIdentifier:imageName];
then in the tapRecognizer:
-(void)doubleTapImgView:(UITapGestureRecognizer *)gesture{
UIImageView *imgView = (UIImageView *)gesture.view;
int idx = [FrontCards indexOfObject:[imgView accessibilityIdentifier]];
}