ios - UIButton - 复选标记未显示

Question

我正在尝试创建一个 uibutton 作为复选框。一切正常，但 View :我正在设置单击时更改 View 。当它应该不显示复选标记时很好，但是当我需要显示复选标记时，它不起作用。这就是发生的事情:




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;
}

怎么了？

问候!

Answer 1

我只是创建一个新项目并添加以下代码。它就像 gif 显示的那样工作。你可以做一个比较。

- (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;
}