text: //
  //  UIViewController+frame.h
  //  ZPCategoryDemo
  //
  //  Created by 张文军 on 2019/4/1.
  //  Copyright © 2019 hare. All rights reserved.
  //
  
  #import <UIKit/UIKit.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  @interface UIViewController (frame)
  
  @property (nonatomic, assign, readonly) CGFloat top;
  @property (nonatomic, assign, readonly) CGFloat bottom;
  
  @end
  
  NS_ASSUME_NONNULL_END
  