UIbutton在水龍頭後改變顏色

Question

我有一個UIButton，它具有預設的文本字體和顏色，我需要在點擊tap按鈕時立即更改。

我嘗試：

- (IBAction)tapAction : (id)sender 
{ 
    // determine button from tag .. 
    [crtBtn setTitleColor:self.selectedTextColor forState:UIControlStateSelected]; 
    [crtBtn setTitleColor:self.selectedTextColor forState:UIControlStateNormal]; 
    [crtBtn setTitleColor:self.selectedTextColor forState:UIControlStateApplication]; 
    [crtBtn setTitleColor:self.selectedTextColor forState:UIControlStateHighlighted];  
    [crtBtn setNeedsDisplay]; 
} 

任何想法如何解決這一問題？

Answer 1

試試這個代碼：

- (IBAction)tapAction : (id)sender 
    { 
    [sender setTitleColor:self.selectedTextColor forState:UIControlStateNormal] 
    } 

Answer 2

我想，你不爲你按鈕（帶crtBtn）設置IBOutlet中。

- (IBAction)tapAction : (id)sender 
{ 
    [crtBtn setTitleColor:self.selectedTextColor forState:UIControlStateNormal]; 
// or 
    [sender setTitleColor:self.selectedTextColor forState:UIControlStateNormal] 
} 

Answer 3

這個工作對我來說：

-(IBAction)tapAction: (UIButton *)sender 

{ 

[crtBtn setTitleColor:self.selectedTextColor forState:UIControlStateNormal]; 

}