text: //
  //  MyManager.h
  //  ObjectiveC
  //
  //  Created by hello on 2018/12/2.
  //  Copyright © 2018 William. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  @interface MyManager : NSObject
  
  + (instancetype)sharedManager;
  
  @end
  
  NS_ASSUME_NONNULL_END
  