iOS UIAlertController使用方法如何使用

UIAlertController *alertController = [UIAlertControlleralertControllerWithTitle:@"密码"message:nilpreferredStyle:UIAlertControllerStyleAlert];

[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {

                // 可以在这里对textfield进行定制，例如改变背景色

textField.placeholder = @"请输入私人直播室的密码";

     }];

 UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel"  style:UIAlertActionStyleCancelhandler:^(UIAlertAction *action) {

               NSLog(@"The \"Okay/Cancel\" alert's cancel action occured.");

            }];

            UIAlertAction *otherAction = [UIAlertActionactionWithTitle:@"OK"style:UIAlertActionStyleDefaulthandler:^(UIAlertAction *action) {

                NSLog(@"The \"Okay/Cancel\" alert's other action occured.");

            }];

            // Add the actions.

            [alertController addAction:cancelAction];

            [alertController addAction:otherAction];

            

            [selfpresentViewController:alertController animated:YEScompletion:nil];