UIButton pressed, other one doesn't press - ios

Question

hi I have some code that creates two buttons and when a button is pressed an trigger is set and it changes the background and the text colour.
How could i make it so that once one is pressed the other cannot be pressed.
This creates the buttons
//learnmore button
UIButton *learnmorebutton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.view addSubview:learnmorebutton];
learnmorebutton.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.3];
learnmorebutton.frame = CGRectMake(0.0, 518.0, 159.0, 50.0);
[learnmorebutton setTitle:#"learn more" forState:UIControlStateNormal];
[learnmorebutton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
learnmorebutton.titleLabel.font = [UIFont fontWithName:#"Helvetica Light" size:17.0];
//signup button
UIButton *signup = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[self.view addSubview:signup];
signup.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.3];
signup.frame = CGRectMake(162.0, 518.0, 160.0, 50.0);
[signup setTitle:#"sign up" forState:UIControlStateNormal];
signup.titleLabel.font = [UIFont fontWithName:#"Helvetica Light" size:17.0];
signup.titleLabel.textColor = [UIColor whiteColor];
These are the two triggers
[learnmorebutton addTarget:self action:#selector(learnMoreClickEvent:) forControlEvents:UIControlEventTouchUpInside];
[signup addTarget:self action:#selector(signupClickEvent:) forControlEvents:UIControlEventTouchUpInside];
These are the two events
- (void)learnMoreClickEvent:(UIButton *)sender
{
//sender is the button that was tapped
[sender setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
sender.backgroundColor = [UIColor whiteColor];
}
- (void)signupClickEvent:(UIButton *)sender
{
//sender is the button that was tapped
[sender setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
sender.backgroundColor = [UIColor whiteColor];
}
thanks all ...

Answer 1

You start by keep a reference to the button, preferably properties on the viewController that creates these buttons.
#interface MyViewController : UIViewController
#property (nonatomic, strong) UIButton *learnmorebutton;
#property (nonatomic, strong) UIButton *signup;
#end;
Then in the method either disable the button:
<button>.enabled = NO:
Or hide it:
<button>.hidden = YES:

Answer 2

like rckoenes mentioned you can declare those UIButton as properties and do that.. or
Assign Tags like this
//learnmore button
UIButton *learnmorebutton = [UIButton buttonWithType:UIButtonTypeCustom];
learnmorebutton.tag = 10;
learnmorebutton.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.3];
learnmorebutton.frame = CGRectMake(0.0, 518.0, 159.0, 50.0);
[learnmorebutton setTitle:#"learn more" forState:UIControlStateNormal];
[learnmorebutton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
learnmorebutton.titleLabel.font = [UIFont fontWithName:#"Helvetica Light" size:17.0];
[learnmorebutton addTarget:self action:#selector(learnMoreClickEvent:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:learnmorebutton];
//signup button
UIButton *signup = [UIButton buttonWithType:UIButtonTypeRoundedRect];
signup.tag = 20;
signup.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.3];
signup.frame = CGRectMake(162.0, 518.0, 160.0, 50.0);
[signup setTitle:#"sign up" forState:UIControlStateNormal];
signup.titleLabel.font = [UIFont fontWithName:#"Helvetica Light" size:17.0];
signup.titleLabel.textColor = [UIColor whiteColor];
[self.view addSubview:signup];
[signup addTarget:self action:#selector(signupClickEvent:) forControlEvents:UIControlEventTouchUpInside];
By Using tags to access the buttons
- (void)learnMoreClickEvent:(UIButton *)sender
{
UIButton *signUp = (UIButton*)[self.view viewWithTag:20]
signUp.enabled = NO;
//sender is the button that was tapped
[sender setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
sender.backgroundColor = [UIColor whiteColor];
}
- (void)signupClickEvent:(UIButton *)sender
{
UIButton *learnmorebutton = (UIButton*)[self.view viewWithTag:10]
learnmorebutton.enabled = NO;
//sender is the button that was tapped
[sender setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
sender.backgroundColor = [UIColor whiteColor];
}
Hope this gives you an Idea.
Basically if your looking for toggling, you can always use UISegementControl. I mean it depends on your requirements.

Answer 3

Set the enabled property of the button you want to disable to NO: <button>.enabled = NO;