text: //
  //  SecondViewController.h
  //  DataSynchronizedDemo
  //
  //  Created by 呼哈哈 on 2019/8/5.
  //  Copyright © 2019 piu. All rights reserved.
  //
  
  #import <UIKit/UIKit.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  @interface SecondViewController : UIViewController
  
  @end
  
  NS_ASSUME_NONNULL_END
  