Question

I’m a beginner to Iphone Development 🙂

I am trying to make a button change an image. So I have my button

- (IBAction)myButton { 
    myUIImageView.image = [UIImage imageNamed:@"myPhoto.png"];
}

I created a UIImageView in IB and I named the label and the name of this ‘myUIImageView’ but XCode is telling me that it’s undeclared. So my question is how do I associate this UIImageView with myUIImageView. Or perhaps how do I reference this UIImage in my myButton IBAction?

Any advice would help, thanks alot!

Answer 1

In your .h, you need this ivar between the curly braces

UIImageView* myUIImageView;

And after the close and before the @end, you need

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

and in the .m, after the @implementation line

@synthesize myUIImageView;

(release in your dealloc and viewDidUnload)

Now,

1. Open up Interface Builder for the .xib for this view controller
2. Click on File’s Owner icon in the Document dialog
3. Bring up the Inspector
4. Go to the connections tab
5. You should see an outlet named myUIImageView with a circle next to it
6. Click and drag the circle to the UIImageView in your view (this connects the outlet to the view)
7. Save, close, rebuild