text: //
  //  NSObject+VDProgressing.h
  //  VDKit
  //
  //  Created by FTET on 15/1/28.
  //  Copyright (c) 2015年 Vilyever. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  
  #ifndef VDCheckProgressing
  #define VDCheckProgressing \
  if ( [self vd_checkProgressing] )\
  {\
      return;\
  }
  #endif
  
  
  @interface NSObject (VDProgressing)
  
  #pragma Methods
  #pragma Public Class Method
  
  #pragma Public Instance Method
  - (BOOL)vd_checkProgressing;
  - (BOOL)vd_checkProgressingWithProgressingInterval:(float)interval;
  - (BOOL)vd_checkProgressingWithIdentifier:(NSString *)identifier;
  - (BOOL)vd_checkProgressingWithIdentifier:(NSString *)identifier withProgressingInterval:(float)interval;
  
  @end
  