如何在点击时更改UIButton的标题颜色？

Question

我有一个视图，我在那里编程创建了一些8个按钮。按钮的标题颜色是白色。点击时，我想将按钮标题的颜色更改为绿色。如果我点击任何其他按钮，以前点击的按钮标题颜色应该变成白色，并且当前按钮标题颜色应该变成绿色。

如何做到这一点？

Answer 1

初始化所有的按钮，这样

[mybutton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
[mybutton setTitleColor:[UIColor greenColor] forState:UIControlStateSelected]; 
[mybutton addTarget:self action:@selector(onclick:) forControlEvents:UIControlEventTouchUpInside]; 

然后点击按钮

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

Answer 2

为所有按钮创建IBAction，创建属性@property (strong, nonatomic) UIButton *currentButton。在操作执行以下操作：

-(IBAction)buttonClicked:(id)sender 
{ 
    UIButton *buttonSender = (UIButton *)sender; 

    [self.currentButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
    self.currentButton = buttonSender; 
    [self.currentButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal]; 
} 

Answer 3

设置控制状态时，改变你的按钮的选中状态：

[btnOk setTitleColor:[UIColor yellowColor] forState:UIControlStateSelected]; 
[btnOk setTitleColor:[UIColor yellowColor] forState:UIControlStateHighlighted]; 
[btnOk setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];