UIAlert不显示

Question

这里是新鲜和绿色的新手。我刚开始编程，并且已经被UIAlert卡住了。我在这个网站上搜索过，但是有很多帖子，而且我说我对这些都有点新鲜，所以我不知道该找什么。这是我的。

-(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

[警报显示]

我总是忘记这一点。快乐编码。

Answer 2

需要做

[alert show]; 

呈现

Answer 3

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 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]; 

}