text: //
  //  UIApplication+JFUtil.h
  //  DingTalkDylib
  //
  //  Created by 耿建峰 on 17/1/18.
  //
  //
  
  #import <UIKit/UIKit.h>
  
  @interface UIApplication (JFUtil)
  
  - (void)jf_setDelegate:(id<UIApplicationDelegate>)delegate;
  
  @end
  