Set image to imageView by ID programmatically in iOS - ios

Question

I'm developing an iOS app and i have a for loop to create images.
When an image receives the click, i would like to change the background of the image, only to that image. how can I do this?
This is my code:
for (int i =0; i<dim; i++) {
likeImageImageview = [[UIImageView alloc] initWithFrame:CGRectMake(paddWidth*20,7.5,39.6,39.6)];
img0 = [UIImage imageNamed:#"like"];
[likeImageImageview setImage:img0];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapImagesLike)];
singleTap.numberOfTapsRequired = 1;
likeImageImageview.userInteractionEnabled = YES; //l'utente può cliccare
[likeImageImageview setMultipleTouchEnabled:NO]; //non è consentito il multitouch
[likeImageImageview addGestureRecognizer:singleTap];
[row_like addSubview:likeImageImageview];
}
And this is the method:
-(void)tapImagesLike{
likeImageImageview.image = [UIImage imageNamed:#"mylike"];
}
With this code, only the last imageview changes its background. How can I use "i" like an ID?

Answer 1

for loop
UIImageView *imageView = …
imageView.tag = i;
So you need to get the view that was tapped
- (void)tapImagesLike:(UITapGestureRecognizer*)recognizer
{
UIImageView *imageView = (UIImageView*)recognizer.view;
int i = imageView.tag;
// Then you can do the change you need to do here
}
This is the method that should be called when the gesture recognizer tap occurs.

Answer 2

It only display the last image because your are creating a new instance in a for loop.
Try this
NSMutableArray *tempImageArray=[[NSMutableArray alloc]init];
for (int i =0; i<10; i++) {
UIImageView *likeImageImageview = [[UIImageView alloc] initWithFrame:CGRectMake(20,7.5,39.6,39.6)];
UIImage *img0 = [UIImage imageNamed:#"like"];
[likeImageImageview setImage:img0];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapImagesLike:)];
singleTap.numberOfTapsRequired = 1;
[self.view addGestureRecognizer:singleTap];
[row_like addSubview:likeImageImageview];
[tempImageArray addObject:likeImageImageview];
}
self.imageArray=tempImageArray;
[tempImageArray release];
And
- (void)tapImagesLike:(UITapGestureRecognizer*)recognizer{
UIImageView *imageView = (UIImageView *)[self.imageArray objectAtIndex:0];
imageView.image=[UIImage imageNamed:#"0.png"];
}