how to change uiimageview image's programmatically - ios

Question

In my ios application i create uiimageviews programmatically like that,
for (int i=0; i<20; i++) {
productID=[products objectAtIndex:i];
UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setFrame:CGRectMake(column*197+38 , row*350+8, 159, 45)];
//[button setImage:redButtonImage forState:UIControlStateNormal];
[button addTarget:self
action:#selector(buttonAction:)
forControlEvents:UIControlEventTouchUpInside];
button.tag = productID;
[scrollView addSubview:button];
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)];
imageView.tag=productID;
UIImage *image = [UIImage imageNamed:#"redImage.png"];
[imageView setImage:image];
[scrollView addSubview:imageView];
}
in my buttonActon, i want to change that uiimageview's image to another image. But i can not do that. Can anyone help me? Thank You.

Answer 1

try like this ,
for (int i=0; i<20; i++) {
productID=[products objectAtIndex:i];
UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setFrame:CGRectMake(column*197+38 , row*350+8, 159, 45)];
//[button setImage:redButtonImage forState:UIControlStateNormal];
[button addTarget:self
action:#selector(buttonAction:)
forControlEvents:UIControlEventTouchUpInside];
button.tag = 100+productID;
[scrollView addSubview:button];
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)];
imageView.tag=productID;
UIImage *image = [UIImage imageNamed:#"redImage.png"];
[imageView setImage:image];
[scrollView addSubview:imageView];
}
keep this one in button action method and pass the imageview tag in the place of imgview.tag
UIImageView *img=(UIImageView *)[scrollView viewWithTag:imgview.tag];
img.image=[UIImage imageNamed:#"name.png"];

Answer 2

Instead of this:
imageView.tag=UrunId;
Write:
imageView.tag = productID + 100;
Because you need a unique tag for each Image View.
Then implement the buttonAction: like:
- (void)buttonAction:(UIButton *)sender
{
UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:(sender.tag+100)];
[imageView setImage:yourImage];
}

Answer 3

Please try to use this one
You should have different tag for button and image.So please give first different tag like this....
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)];
imageView.tag=button.tag+1;
UIImage *image = [UIImage imageNamed:#"redImage.png"];
[imageView setImage:image];
[scrollView addSubview:imageView];
After that do this...
- (void)buttonAction:(UIButton *)sender
{
UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:sender.tag+1];
imageView.image=[UIImage imageNamed:#"imageName"];
}