有时候需要用户确认一些操作，比如退出，删除数据等等，用UIActionSheetDelegate实现比较友好，实现也很简单，controller实现UIActionSheetDelegate协议就可以了，示例如下:
01 #pragma mark-
02 #pragma mark UIActionSheetDelegate with logOff
03
04 - (void) onLogOffButtonClick:(id)sender{
05 UIActionSheet actionSheet = [[UIActionSheet alloc] initWithTitle:@“确认要退出登录吗？” delegate:self cancelButtonTitle:@“不退出” destructiveButtonTitle:@“退出” otherButtonTitles:nil, nil];
06
07 [actionSheet showFromTabBar:self.navigationController.tabBarController.tabBar];
08 XX_RELEASE_SAFELY(actionSheet);
09 }
10 - (void)logOff{
11
12 //do logoff
13
14 [self.navigationController popViewControllerAnimated:YES];
15 }
16
17 - (void)actionSheet:(UIActionSheet )actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex; {
18 switch (buttonIndex) {
19 case 0:
20 [self logOff];
21 break;
22 case 1:
23 [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];
24 break;
25 default:
26 break;
27 }
28 }
02 #pragma mark UIActionSheetDelegate with logOff
03
04 - (void) onLogOffButtonClick:(id)sender{
05 UIActionSheet actionSheet = [[UIActionSheet alloc] initWithTitle:@“确认要退出登录吗？” delegate:self cancelButtonTitle:@“不退出” destructiveButtonTitle:@“退出” otherButtonTitles:nil, nil];
06
07 [actionSheet showFromTabBar:self.navigationController.tabBarController.tabBar];
08 XX_RELEASE_SAFELY(actionSheet);
09 }
10 - (void)logOff{
11
12 //do logoff
13
14 [self.navigationController popViewControllerAnimated:YES];
15 }
16
17 - (void)actionSheet:(UIActionSheet )actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex; {
18 switch (buttonIndex) {
19 case 0:
20 [self logOff];
21 break;
22 case 1:
23 [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];
24 break;
25 default:
26 break;
27 }
28 }