ios - UIButton 按下，另一个不按下

Question

嗨，我有一些代码可以创建两个按钮，当按下一个按钮时，会设置一个触发器，它会更改背景和文本颜色。

我怎样才能做到一旦按下一个就不能按下另一个。

这将创建按钮

//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];

这是两个触发器

   [learnmorebutton addTarget:self action:@selector(learnMoreClickEvent:) forControlEvents:UIControlEventTouchUpInside];
    [signup addTarget:self action:@selector(signupClickEvent:) forControlEvents:UIControlEventTouchUpInside];

这是两个事件

- (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];


}

谢谢大家...

Answer 1

您首先保留对按钮的引用，最好是创建这些按钮的 viewController 上的属性。

@interface MyViewController : UIViewController

@property (nonatomic, strong) UIButton *learnmorebutton;
@property (nonatomic, strong) UIButton *signup;

@end;

然后在方法中禁用按钮:

<button>.enabled = NO:

或者隐藏它:

<button>.hidden = YES: