在IBOutletCollection中設置單個標題的UIButtons

Question

是否有人知道如何使用IBOutletCollection來設置按鈕數組中每個單獨按鈕的標題？這是我試過的，但代碼設置了所有按鈕的標題。我已將插座連接到按鈕並設置其各自的標籤。

.h file 
@property (nonatomic, retain) IBOutletCollection(UIButton) NSArray *buttonCollection; 

.m file 
- (IBAction)switchAction:(id)sender { 

    for (UIButton *btn in buttonCollection) { 
     if (btn.tag == 0) { 
      [btn setTitle:@"1st Button" forState:UIControlStateNormal]; 
     } else if (btn.tag == 1) { 
      [btn setTitle:@"2nd Button" forState:UIControlStateNormal]; 
     } else if (btn.tag == 2) { 
      [btn setTitle:@"3rd Button" forState:UIControlStateNormal]; 
     } 
} 

Answer 1

如果你只是想設置你點擊按鈕的標題，擺脫for循環，

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

    if (sender.tag == 0) { 
      [sender setTitle:@"1st Button" forState:UIControlStateNormal]; 
    } else if (sender.tag == 1) { 
      [sender setTitle:@"2nd Button" forState:UIControlStateNormal]; 
    } else if (sender.tag == 2) { 
     [sender setTitle:@"3rd Button" forState:UIControlStateNormal]; 
} 

Answer 2

試試這個：

for (int i = 0; i < [buttonCollection count]; ++i) 
{ 
    [((UIButton*)self.buttonCollection[i]) setTitle: [NSString stringWithFormat: @"%d button", i] forState: UIControlStateNormal]; 
}