Question

The user can create a unlimited number of UIImageViews with a button press with this code:

- (IBAction) addPicture:(id)sender { 
    imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0.0, 45.0, 324, 52.0)]; 
    imageView.tag = a;
    imageView.image = [UIImage imageNamed:@"Picture.png"];
    a = a + 1;
    [self.view addSubview:imageView]; 
    [imageView release];
}

So the first UIImageView gets the tag 1 and the second 2 and so on… Now how can I find out, which UIImageView was select by the user with a touch? I think, I have to do this in touchesBegan, but as I said, I don´t know how to get the right UIImageView.

For example in my app-idea the user can create images with a button and then he select a picture with a touch and can move it and resize it.

Thanks for your help.

Answer 1

Instead of using tag of UIImageView, why don’t you create your own subclass of UIImageView?
You can overwrite touchesBegan method in the subclass, so you can detect a touch.
Then in the subclass, you can move or resize a picture which the subclass has.