Set Individual Title of UIButtons in IBOutletCollection

问题

Does anybody know how to set the title of each individual button in an array of buttons using an IBOutletCollection? This is what I have tried, but the code sets the title of all the buttons. I have connected the outlet to the buttons and set their respective tags.

.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];
       }
}

回答1:

If you only want to set the title of the button you've clicked on, get rid of the for loop,

- (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];
}

回答2:

Try this:

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

来源：https://stackoverflow.com/questions/22867120/set-individual-title-of-uibuttons-in-iboutletcollection