Issue with scroll view and accessing its subviews - objective-c

Question

I have a scroll view that contains image view sized 68x78:
As you could see, all that images except from the centered one have a shadow. It changes when user scrolls, center image is always clear. It goes perfect until for the left edge image:
Here is the code:
-(void) buildSlideView{
fotosJugadores = [[NSArray alloc] initWithObjects:#"cara5.png", #"cara7.png", #"cara8.png", #"cara9.png", #"cara11.png", #"cara13.png", #"cara14.png", #"cara15.png", #"cara18.png",#"cara19.png", #"cara20.png", #"cara32.png",#"cara44.png",#"cara51.png", #"cara100.png", #"cara101.png", #"cara102.png",#"cara103.png", #"cara104.png", #"cara105.png",#"cara106.png",#"cara107.png", nil];
numberOfViews = [fotosJugadores count];
for (int i = 0; i < [fotosJugadores count]; i++) {
UIImage *myImage = [UIImage imageNamed:[fotosJugadores objectAtIndex:i]];
CGFloat yOrigin = i * (myImage.size.width+3) + 120;
UIImageView *awesomeView = [[UIImageView alloc] initWithFrame:CGRectMake(yOrigin, 0, myImage.size.width, myImage.size.height)];
awesomeView.tag = i;
awesomeView.image = myImage;
awesomeView.alpha = 0.5f;
awesomeView.backgroundColor = [UIColor blackColor];
[self.jugadorSlide addSubview:awesomeView];
awesomeView=nil;
}
[jugadorSlide setBackgroundColor:[UIColor blackColor]];
jugadorSlide.contentSize = CGSizeMake(68 * numberOfViews+240,78);
jugadorSlide.layer.cornerRadius = 11;
jugadorSlide.layer.masksToBounds = YES;
[jugadorSlide setContentOffset:CGPointMake(((68 * numberOfViews)/2), 0)];
//jugadorSlide.decelerationRate = UIScrollViewDecelerationRateNormal;
[self scrollViewDidEndDragging:jugadorSlide willDecelerate:NO];
}
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
currentIndex = roundf(scrollView.contentOffset.x / 68);
NSLog(#"current end %d", currentIndex);
UIImageView *currentImage = [scrollView viewWithTag:currentIndex];
if (currentIndex>0&&currentIndex<=21){
if (currentIndex==currentImage.tag){
currentImage.alpha=1.0f;
[self changePerfilImage:currentImage.tag];}
CGPoint pointZero= CGPointMake(scrollView.contentOffset.x, currentImage.frame.origin.y);
[jugadorSlide setContentOffset:pointZero animated:YES];
}else {
UIImageView *currentImage = [scrollView viewWithTag:0];
NSLog(#"end dragging image tag %d", currentImage.tag);
currentImage.alpha=1.0f;
[self changePerfilImage:currentImage.tag];}
CGPoint pointZero= CGPointMake(currentImage.frame.origin.x+15, 0);
//[jugadorSlide setContentOffset:pointZero animated:YES];
}
As you can see, in the scrollViewDidEndDragging: "else" , I forced the tag as a desesperate solution, but images doesn't get clear.

Answer 1

You are incrementing the tag twice...
awesomeView.tag = i++;
Should just be:
awesomeView.tag = i+1;
I use i+1 because I never use a tag of 0 since any subview that hasn't been assigned a tag will have a tag of 0.
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
NSInteger currentIndex = roundf(scrollView.contentOffset.x / 68.0) + 1;
UIImageView *currentImage = [scrollView viewWithTag:currentIndex];
...
}
If this doesn't work you should NSLog the currentIndex each time you land on a new image and see what is happening when you land on the first one.