Question

I am trying to make a button in my IPhone app which changes an existing image (simple, I know! but I’ve spent 2 days on this 🙂

I have a button:

- (IBAction)myButton {  
    myUIImageView.image = [UIImage imageNamed:@"image.jpg"];
    NSLog(@"my button");
}

I am attempting to find out why the button is not doing anything. “my button” does get logged to the console so I know its mapped correctly. Firstly, I was hoping someone could tell me if I could perhaps log some more important info here, like the image file path? Or perhaps you see why this isn’t working.

I synthesize myUIImageView above this:

@synthesize myUIImageView;

And I declare it in my .h file:

- (IBAction)myButton;
    @property(retain, nonatomic) IBOutlet UIImageView* myUIImageView;

Answer 1

Two things to try:

1. Make sure that your UIImageView is
   actually being displayed. Do do this, just set its background color to something
   visible, e.g.,
   myUIImageView.backgroundColor =
[UIColor redColor];.
2. Make sure that your image file
   (“image.jpg”) is part of your
   project.