UIAlert不顯示

Question

這裏是新鮮和綠色的新手。我剛開始編程，並且已經被UIAlert卡住了。我在這個網站上搜索過，但是有很多帖子，而且我說我對這些都有點新鮮，所以我不知道該找什麼。這是我的。

-(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

[警報顯示]

我總是忘記這一點。快樂編碼。

Answer 2

需要做

[alert show]; 

呈現

Answer 3

代碼應該是：

-(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

- （無效）showError {

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

    [alert show]; 

}