UIAlert没有显示

Question

新鲜绿色的新手在这里。我刚刚开始编程，已经被UIAlert困住了。我在这个网站上搜索过，但有很多帖子，我说我对这一切都是新手，所以我不知道该找什么。这就是我所拥有的。

-(void)showError {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                message:@"Please try again later. Have a nice day."
                                               delegate:nil
                                      cancelButtonTitle:@"Dismiss"
                                      otherButtonTitles:nil];
}

Answer 1

需要做

[alert show];

出席

Answer 2

代码应该是：

-(void)showError {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                message:@"Please try again later. Have a nice day."
                                               delegate:nil
                                      cancelButtonTitle:@"Dismiss"
                                      otherButtonTitles:nil];
[alert show];
[alert release];
}

Answer 3

[alert show];

我也总是忘记这一点。快乐的编码。

Answer 4

- （无效）showError {

   UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                  message:@"Please try again later. Have a nice day."
                                  delegate:nil
                                  cancelButtonTitle:@"Dismiss"
                                  otherButtonTitles:nil];

   [alert show];

}