ios - 无法为 uialertview 设置标签

Question

这是我使用的设置标签的 UIAlertView

 UIAlertView *alertViewDelete = [[UIAlertView alloc] initWithTitle:@"delete User"
                                                                        message:@"can't restore data after deletion"
                                                                       delegate:nil
                                                              cancelButtonTitle:@"delete"
                                                              otherButtonTitles:@"cancel", nil];
                alertViewDelete.tag = 97;
                [alertViewDelete show];

使用这段代码读取点击的按钮

- (void)alertView:(UIAlertView *)alertView1 clickedButtonAtIndex:(NSInteger)buttonIndex {
    if(alertView1.tag == 97)
    {
    if(buttonIndex == 1)
    {
        NSLog(@"ok");
    }
        else
        {
            NSLog(@"bye");
        }
    }
}

iOS 应用程序 Objective-C ... 我一遍又一遍地检查这段代码，找不到哪里或哪里做错了。

Answer 1

你忘记了两件事

在 viewcontroller.h 中添加 UIAlertviewDelegate

设置

 alertViewDelete.delegate = self;
 alertViewDelete.tag = 97;
 [alertViewDelete show];