text: //
  //  Item50ViewController.h
  //  EffectiveObjective-C
  //
  //  Created by Insomnia on 2018/9/11.
  //  Copyright © 2018年 Insomnia. All rights reserved.
  //
  
  #import <UIKit/UIKit.h>
  
  @interface Item50ViewController : UIViewController
  
  @end
  