text: //
  //  UIDevice+Category.h
  //  RecordObjective-C
  //
  //  Created by Apple on 2017/7/3.
  //  Copyright © 2017年 Xz Studio. All rights reserved.
  //
  
  #import <UIKit/UIKit.h>
  
  @interface UIDevice (Category)
  
  + (double)systemVersion;
  
  @property (nonatomic, assign, readonly) BOOL isPad;
  
  @property (nonatomic, assign, readonly) BOOL isSimulator;
  
  // 是否越狱
  @property (nonatomic, assign, readonly) BOOL isJailbroken;
  
  @end
  
  
  