ios - UIButton:单击时更改标题颜色，单击其他按钮时更改回来

Question

我希望 aButton 在我单击时将 titleColor 从白色更改为红色

但是当我点击其他按钮时，我希望 aButton 变回白色

我该怎么做？

这是我写的代码，但它不能按我想要的方式运行。

[aButton setTitleColor:[UIColor redColor] forState:UIControlStateSelected];

Answer 1

使用setSelected:改变按钮的选择状态。

在viewDidLoad中:

[aButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[aButton setTitleColor:[UIColor redColor] forState:UIControlStateSelected];

[bButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[bButton setTitleColor:[UIColor redColor] forState:UIControlStateSelected];

aButton.selected = YES;


- (IBAction)aButton_or_bButtonClicked:(id)sender {

    if(aButton.selected) {
        aButton.selected = NO;
        bButton.selected = YES;
    }
    else {
        aButton.selected = YES;
        bButton.selected = NO;
    }
}