text: //
  //  NSString+XQExt.h
  //  HBLive
  //
  //  Created by xx on 16/1/19.
  //  Copyright © 2016年 haibian. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  #import <UIKit/UIKit.h>
  
  @interface NSString (XXExt)
  - (float) heightWithFont: (UIFont *) font withinWidth: (float) width;
  - (float) widthWithFont: (UIFont *) font;
  - (NSString *)md5;
  - (NSString *)URLEncodedString;
  @end
  