UIAlertView使用

 1 // Called when a button is clicked. The view will be automatically dismissed after this call returns
 2 //當用戶單擊警告框中得某個按鈕時激發該方法，buttonIndex代表用戶單擊的按鈕的索引，從0開始
 3 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex;
 4 
 5 // Called when we cancel a view (eg. the user clicks the Home button). This is not called when the user clicks the cancel button.
 6 // If not defined in the delegate, we simulate a click in the cancel button
 7 //取消按鈕時（用戶單擊home鍵）激發
 8 - (void)alertViewCancel:(UIAlertView *)alertView;
 9 
10 // before animation and showing view
11 //警告框將要顯示出來時激發
12 - (void)willPresentAlertView:(UIAlertView *)alertView;  
13 
14  // after animation
15 //警告框完全顯示出來后激發
16 - (void)didPresentAlertView:(UIAlertView *)alertView; 
17 
18 // before animation and hiding view
19 //當用戶通過單擊某個按鈕將要隱藏該警告框時激發
20 - (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex; 
21 
22 // after animation
23 //當用戶通過單擊某個按鈕完全隱藏該警告框時激發
24 - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex;  
25 
26 // Called after edits in any of the default fields added by the style
27 //每次編輯輸入框時會調用
28 - (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView;

1    UIAlertViewStyleDefault = 0,//默認的警告框風格
2     UIAlertViewStyleSecureTextInput,//警告框中包含一個密碼輸入框
3     UIAlertViewStylePlainTextInput,//警告框中包含一個普通輸入框
4     UIAlertViewStyleLoginAndPasswordInput//警告框中包含用戶名、密碼兩個輸入框