Question

I am having an issue with TTImagViews inside UIScrollview. I searched high and low, but coul’dnt really find a solution. Interestingly, the tap gesture works on the last TTImageview inside the scrollview. For instance i have 10 images, that the user can scroll and the touch gesture works only on the 10th image on page 2 or rather, the last image. This is my code; any suggestions?

 UIScrollView *imageScroll=[[UIScrollView alloc] initWithFrame:CGRectMake(70, postMessageLabel.frame.size.height+10, 250, 78)];
    [imageScroll setContentSize:CGSizeMake(70 * ([[images objectAtIndex:0]count])+10,64)];        
    int startAtX=5;
    for(int i=0;i<[[images objectAtIndex:0]count];i++){
        if([[GlobalFunctions sharedGlobalFunctions] isValidURL:[[images objectAtIndex:0] objectAtIndex:i]]){
            TTImageView *imageView=[[TTImageView alloc] initWithFrame:CGRectMake(startAtX, 5, 64, 64)] ;
            imageView.userInteractionEnabled=YES;  
            [imageView addGestureRecognizer:thumbnailTap];                 
            imageView.urlPath=[[images objectAtIndex:0] objectAtIndex:i];
            imageView.autoresizesToImage=NO;
            imageView.defaultImage=nil;
            imageView.delegate=self;    
            [imageView setBackgroundColor:[UIColor blackColor]];
            [imageScroll addSubview:imageView];
            [imageView release];

        }
            startAtX+=70;            
    }

    [imageScroll setBounces:YES];
    [imageScroll setDelaysContentTouches:YES];
    [imageScroll setCanCancelContentTouches:NO];
    [self.view addSubview:imageScroll];
    [imageScroll release];

And yeah, the tap gesture works perfectly if there is only one ttimageview inside the uiscrollview. I have no clue why!

Answer 1

Well, Looks’ like there is nothing wrong with my code; the only difference is how i am attaching the gesture recognizer. Even though i fixed i am not sure about why it went wrong. This is what happened

1. I have declared a gesture recognizer in my viewdidload with the typical alloc init.
2. Hence, i assumed, the gesture recognizer is available througout the view. I just kept adding it to a loop of images.

Step 2; seemed to be the problem. The problem went away when i declared a gesture recognizer for each and every image and released it after assigning it.

So technically for each image

---Create a gesture recognizer
   |-Attach it to the TTImageView
---Release the gesture recognizer

That solved the problem. But am still curious, why the gesture recognizer works when assigned to a single and image and fails when i assign it to multiple imageviews.

Thanks Abdullah for trying, but your solution got me nowhere.