text: //
  //  ZXDropDownView.h
  //  ZXDropDownMenuDemo
  //
  //  Created by 郑旭 on 2017/9/11.
  //  Copyright © 2017年 郑旭. All rights reserved.
  //
  
  #import <UIKit/UIKit.h>
  @class ZXDropDownView;
  @protocol ZXDropDownViewDataSource <NSObject>
  - (NSInteger)numberOfRowsForDropDownView;
  - (NSString *)titleForRow:(NSInteger)row;
  @end
  @protocol ZXDropDownViewDelegate <NSObject>
  - (void)didSelectAtRow:(NSInteger)row;
  @end
  
  @interface ZXDropDownView : UIView
  - (instancetype)init;
  - (void)shouldToShowDropDownView;
  - (void)shouldToHideDropDownView;
  - (void)reloadData;
  @property (nonatomic,weak) id<ZXDropDownViewDataSource> dataSource;
  @property (nonatomic,weak) id<ZXDropDownViewDelegate> delegate;
  @property (nonatomic,assign) NSInteger column;
  @property (nonatomic,assign) NSInteger currentSelectedIndex;
  @end
  