调用UIAlertController时为其添加action使按

创建UIAlertController时 addAction: 使只做信息展示和按钮展示，不添加按钮响应事件

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"xxxx" message:@"他大大爷和他二大爷都是他大爷" preferredStyle:UIAlertControllerStyleAlert];

        UIAlertAction *updateAction = [UIAlertAction actionWithTitle:@"xxxx" style:UIAlertActionStyleDefault handler:nil];

        [alert addAction:updateAction];

        alert.view.userInteractionEnabled = NO;

        [self presentViewController:alert animated:YES completion:nil];