[IOS UIalert模版]

1.alertview创建

UIAlertView *alert;
        alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"题库有更新，需要更新吗？" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:@"取消", nil];
        [alert setTag:];
        [alert show];

2.回调函数

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {

    if ([alertView tag] == ) {
        if (buttonIndex == ) {     // and they clicked OK.
           //更新题库
        }
    }

}