대리 방법"clickedButtonAtIndex:"은 불

Question

을 만들었 경고 보기는 두 개의 버튼으로 다음 코드를 사용하면 사용:

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle: title 
message: msg delegate:nil cancelButtonTitle:@"Replay" otherButtonTitles:@"Highscore", nil];
[alertView show];

내가 코드를 실행하려는 경우 하나의 버튼 클릭합니다.그렇게하기 위해서는,추가했 다음과 같은 방법을 다할 수 있습니다.m file:

 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
 if (buttonIndex==0) //Run some code 
 else //Other code
 }

하지만 이 메소드는 호출하지 않는 경우 하나의 버튼!할 수 있는 누군가가 나에게 왜?

사전에 감사합니다,

Sagiftw

Answer 1

delegate:nil

how will the alert view associate a delegate if you specified there will be no delegates? Replace that part with

delegate:self

instead.

Answer 2

도 설정 대리인이 자신의 전무합니다.

Answer 3

I was calling UIAlertView's dismissWithClickedButtonIndex:animated: method from UITextField delegate method because I wanted to handle the keyboard return key as well:

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    if (textField.tag == 1001) {
        [textField resignFirstResponder];
        [_alert dismissWithClickedButtonIndex:1 animated:YES];
    }
    return YES;
}

This way method alertView:clickedButtonAtIndex: never gets called even if you set up proper delegate. Instead alertView:didDismissWithButtonIndex: does get called. So implement this method instead:

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
    // your code here
}

If you just want to handle alert view's buttons only, those first call clickedButtonAtIndex and then didDismissWithButtonIndex.

Answer 4

in .h put UIActionSheetDelegate and in .m while creating a alertView put the delegate to self not nil as being done in the above case

Answer 5

The correct answer for this question is delegate:nil. But in case that the delegate is already set to self, and the clickedButtonAtIndex is still not working, try checking if you are popping another view controller ([self.navigationController popViewControllerAnimated:YES];) after showing the alertview. This can also result to clickedButtonAtIndex not being called. This is what happened to me.

Hope this helps someone.