UIButton - 没有显示复选标记

Question

我正在尝试创建一个uibutton作为复选框。一切都工作正常，但视图：我设置在点击时更改视图。如果它没有显示任何复选标记，那很好，但是当我需要显示复选标记时，它不起作用。这就是：

这是代码：

- (void)viewDidLoad {
    [super viewDidLoad];

    [self.myButton setTitle:@"\u2610" forState:UIControlStateNormal];
    [self.myButton setTitle:@"\u2610" forState:UIControlStateHighlighted];
    [self.myButton setTitle:@"\u2610" forState:UIControlStateDisabled];
    [self.myButton setTitle:@"\u2610" forState:UIControlStateNormal];
    [self.myButton setTitle:@"\u2611" forState:UIControlStateSelected];
}

//action sent to the button when touched up inside
- (IBAction)moneyButtonClicked:(id)sender {
    UIButton *button  = (UIButton *)sender;
    button.selected = !button.selected;
}

有什么问题？

问候！

Answer 1

我想您忘记在故事板或代码中添加动作事件

- (void)viewDidLoad {
    [super viewDidLoad];
    [self addMenuButton];

    [self.myButton setTitle:@"\u2610" forState:UIControlStateNormal];
    [self.myButton setTitle:@"\u2611" forState:UIControlStateSelected];

    [self.myButton addTarget:self action:@selector(moneyButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
}

- (IBAction)moneyButtonClicked:(UIButton *)sender {

    NSLog(@"%d",sender.selected);

    sender.selected = !sender.selected;
}

按钮类型必须是自定义，否则您将找到带有选择的按钮的色调颜色。

输出：

取消选择：

选择：

Answer 2

我只是创建一个新项目并添加以下代码。它像gif节目一样工作。你可以做比较。

- (void)viewDidLoad {
    [super viewDidLoad];
    self.checkButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.checkButton addTarget:self action:@selector(moneyButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
    self.checkButton.frame = CGRectMake(50, 50, 50, 50);
    self.checkButton.titleLabel.textColor = [UIColor redColor];
    self.checkButton.backgroundColor = [UIColor yellowColor];
    [self.checkButton setTitle:@"\u2610" forState:UIControlStateNormal];
    [self.checkButton setTitle:@"\u2611" forState:UIControlStateSelected];
    [self.view addSubview:self.checkButton];
}

- (IBAction)moneyButtonClicked:(id)sender {
    UIButton *button  = (UIButton *)sender;
    button.selected = !button.selected;
}

Answer 3

来自ooops和Ashish Kakkad的答案，但我的代码的问题是：在界面构建器中，我的按钮被设置为系统按钮而不是自定义。