IOS系统分享UIActivityTypePostToWeibo怎么写

在做微信朋友圈多图分享时，遇到问题，像下面OC中的 UIActivityTypePostToFacebook 这样的常量，用JS应该怎么写？

//  
//  UIActivity.h  
//  UIKit  
//  
//  Copyright 2012-2016 Apple Inc. All rights reserved.  
//  

#import <Foundation/Foundation.h>  
#import <UIKit/UIKitDefines.h>  

NS_ASSUME_NONNULL_BEGIN  

@class UIImage, UIViewController;  

#if UIKIT_STRING_ENUMS  
typedef NSString * UIActivityType NS_EXTENSIBLE_STRING_ENUM;  
#else  
typedef NSString * UIActivityType;  
#endif  

UIKIT_EXTERN UIActivityType const UIActivityTypePostToFacebook     NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypePostToTwitter      NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypePostToWeibo        NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;    // SinaWeibo  
UIKIT_EXTERN UIActivityType const UIActivityTypeMessage            NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypeMail               NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypePrint              NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypeCopyToPasteboard   NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypeAssignToContact    NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypeSaveToCameraRoll   NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypeAddToReadingList   NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypePostToFlickr       NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypePostToVimeo        NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypePostToTencentWeibo NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypeAirDrop            NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;  
UIKIT_EXTERN UIActivityType const UIActivityTypeOpenInIBooks       NS_AVAILABLE_IOS(9_0) __TVOS_PROHIBITED;