Question

I am a beginner in Xcode, and I have a problem.
I have 2 buttons:

- (IBAction) HIGH1: (id) sender
- (IBAction) HIGH2: (id) sender

When the user clicks the HIGH1button, I want to change the background (with image) of the button HIGH2.

How can I achieve this?

Answer 1

You need to create IBOutlet for the buttons to change them.

Control+drag the buttons from Interface Builder to the .h file to create the outlets. Something like this:

@property (weak, nonatomic) IBOutlet UIButton *HIGH1;
@property (weak, nonatomic) IBOutlet UIButton *HIGH2;
//Dont forget to @synthesize

On the IBAction method you then call:

- (IBAction) HIGH1: (id) sender
{
    self.HIGH2 setBackgroundImage:[UIImage imageNamed:@"myButtonImage"] forState:UIControlStateNormal];
}

Make sure you have an image with the name you choose in your application bundle, and that the IBOutlet to the buttons is properly connected (The gray circle on the left size of the IBOutlet must have a small black circle inside it)