Question

I have a uiscrollview and i am showing some dynamically generated uiimageview over it. Now i want to do an action on touch at any of these images. I tried using touchbegn method but it is not being called. Please advice me what i am doing wrong.

int numofRows = [arrMyPhotos count]/3;
    if([arrMyPhotos count]%3>0)
        numofRows++;
    scrlPhotoList.contentSize = CGSizeMake(320, numofRows*100);
    for(int i = 0;i<numofRows;i++) {
        x = 10;
        j = 0;
        while (j<3 && k<[arrMyPhotos count]) {
            NSString *pngFilePath = [[NSString stringWithFormat:@"%@/",docDir] stringByAppendingFormat:@"%@",[(NSDictionary*)[arrMyPhotos objectAtIndex:k] objectForKey:@"picName"]];
            NSLog(@"%@",pngFilePath);
            UIImage *img = [UIImage imageWithContentsOfFile:pngFilePath];
            if(img!=nil) {
                UIImageView *imgVw = [[UIImageView alloc] init];
                imgVw.image = [self imageByScalingAndCroppingForSize:CGRectMake(0, 0, 95, 95) image:img];
                imgVw.tag = k;
                imgVw.frame = CGRectMake(x, y, 95, 95);
                imgVw.userInteractionEnabled = TRUE;
                imgVw.multipleTouchEnabled = TRUE;

                [scrlPhotoList addSubview:imgVw];
                //k++;
                x = x+105;
                j++;
            }
            k++;
        }
        y = y+105;
    }
    [self.view addSubview:scrlPhotoList];



-(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {
    UITouch *touch = [[event allTouches] anyObject];
    //CGPoint touchLocation = [touch locationInView:self.view];

    if(([touch view]).tag>0) {
        NSLog(@"%d",([touch view]).tag);
    }
}

Answer 1

Your code seems to be in the UIControllerView, for handling touch events you need to extend the view you want to implement the touch on and the controller!.

If what you want, is a basic touch events you’ll need to have UIButton or some other UIView that supports touch events