add UISwipeGestureRecognizer to UIimageView that made by array - ios

Question

Code:
Header file:
#interface game : UIViewController
{
UIImageView *anh[8][8];
}
-(void)SwipeToMove:(id)sender;
#end
Implementation file:
- (void)viewDidLoad
{
[super viewDidLoad];
UISwipeGestureRecognizer *move = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:#selector(SwipeToMove:)];
[move setDirection:(UISwipeGestureRecognizerDirectionUp)];
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
anh[i][j]=[[UIImageView alloc] initWithFrame:CGRectMake(0+40*i,200 + 40*j,40,40)];
anh[i][j].userInteractionEnabled = YES;
[self.view addSubview:anh[i][j]];
anh[i][j].image = [UIImage imageNamed:#"Earth.png"];
[anh[i][j] addGestureRecognizer:move];
}
}
}
-(void)SwipeToMove:(id)sender{
NSLog(#"ok");
}
The UIImageView works as expected, but UISwipeGestureRecognizer is not working. Then, I tried this:
- (void)viewDidLoad
{
[super viewDidLoad];
UIImageView *image1 = [[UIImageView alloc]initWithFrame:CGRectMake(100,50,40,40)];
label1.image = [UIImage imageNamed:#"Ceres.png"];
[self.view addSubview:image1];
image1.userInteractionEnabled = YES;
image1.image = [UIImage imageNamed:#"Earth.png"];
UISwipeGestureRecognizer *move = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:#selector(SwipeToMove:)];
[move setDirection:(UISwipeGestureRecognizerDirectionUp)];
[image1 addGestureRecognizer:move];
-(void)SwipeToMove:(id)sender{
NSLog(#"OK");
}
It's working, but I need an array of UIImageViews to make my app. Please help me.

Answer 1

Your code is only creating one gesture recognizer, but you try to add it many image views. You need to create the gesture recognizer inside the loop so you create a new one for each image view.
(void)viewDidLoad
{
[super viewDidLoad];
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
UISwipeGestureRecognizer *move = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:#selector(SwipeToMove:)];
[move setDirection:(UISwipeGestureRecognizerDirectionUp)];
anh[i][j]=[[UIImageView alloc] initWithFrame:CGRectMake(0+40*i,200 + 40*j,40,40)];
anh[i][j].userInteractionEnabled = YES;
[self.view addSubview:anh[i][j]];
anh[i][j].image = [UIImage imageNamed:#"Earth.png"];
[anh[i][j] addGestureRecognizer:move];
}
}
}

Answer 2

You are adding the same gesture recognizer all the time to the different images, so it will take just the last one for my understanding, because you have just created one. Create an aux recognizer like an aux var inside the loop and give a tag to every UIImageView so you can access to the tag and distinguish every swipe in every image, when it has happened in your app. It should work. But basically :
for (....){
// create aux gesture recognizer and assign it to the UIImageView
}
Hope it helps.