text: //
  //  UINavigationBar+Extensions.h
  //  XTAttributeLabel
  //
  //  Created by zjwang on 16/7/26.
  //  Copyright © 2016年 夏天然后. All rights reserved.
  //
  
  #import <UIKit/UIKit.h>
  @interface UINavigationBar (Extensions)
  - (void)xtSetBackgroundColor:(UIColor *)backgroundColor;
  - (void)xtSetElementsAlpha:(CGFloat)alpha;
  - (void)xtSetTranslationY:(CGFloat)translationY;
  - (void)xtReset;
  @end
  