FBSDKSharingDelegate 回调不起作用，即使发布工作正常

Posted 2023-03-16

【中文标题】FBSDKSharingDelegate 回调不起作用，即使发布工作正常

【英文标题】：FBSDKSharingDelegate callback not working, even when post works fine

【发布时间】：2015-08-18 18:30:43

【问题描述】：

FBSDKSharingDelegate 回调不起作用。我可以使用 ios SDK 正常发布到 facebook，但我想检测发布是否成功并采取额外措施通知用户。但是，回调对我不起作用。委托方法没有被调用，我不知道为什么。

使用 ios8，Parse 作为我的后端。在 Parse 中，用户链接到 FB。我正在使用IOS模拟器。

我尝试过的： 我已确保授予、保存和链接到 Parse 用户的发布权限。我进行了检查，检测到“publish_actions”正常。发布工作正常，因为我可以在 facebook 帐户上看到该帖子。只是回调不起作用。我检查了我的 fb 设置，它看起来不错。为了在最底部进行良好的衡量，我已经包含了我的应用程序委托中的相关代码。我已经用 XXXX 屏蔽了机密密钥。

代码：

1st：查看用户是否登录 Parse，如果没有，发送登录并链接到 Facebook 帐户。完成后，我请求“发布”权限并将该附加权限链接到 Parse 用户。我知道这在我重新编译时可以正常工作，它会记住“发布”权限并直接进入帖子。

@interface FacebookAPIPost () <FBSDKSharingDelegate>
@end

@implementation FacebookAPIPost
-(void)shareSegmentFacebookAPI     //if statement below

    //1) logged in?, if not send to sign up screen
    //2) else if logged in, link account to facebook account, then send post
    //3) else send to post b/c signed up and linked already.
    PFUser *currentUser = [PFUser currentUser];
    if(!currentUser) 
        [self pushToSignIn];
     else if(![PFFacebookUtils isLinkedWithUser:currentUser])
        [self linkUserToFacebook:currentUser];
        NSLog(@"user account not linked to facebook");
     else 
        [self shareSegmentWithFacebookComposer];
    



-(void)linkUserToFacebook:currentUser

    [PFFacebookUtils linkUserInBackground:currentUser withPublishPermissions:@[@"publish_actions"] block:^(BOOL succeeded, NSError *error) 
        if(error)
            NSLog(@"There was an issue linking your facebook account. Please try again.");
        
        else 
            NSLog(@"facebook account is linked");
            //Send the facebook status update
            [self shareSegmentWithFacebookComposer];
        
    ];



-(void)shareSegmentWithFacebookComposer
if ([[FBSDKAccessToken currentAccessToken] hasGranted:@"publish_actions"]) 
    [self publishFBPost]; //publish
 else 
    NSLog(@"no publish permissions"); // no publish permissions so get them, then post


    [PFFacebookUtils linkUserInBackground:[PFUser currentUser]
                   withPublishPermissions:@[ @"publish_actions"]
                                    block:^(BOOL succeeded, NSError *error) 
                                        if (succeeded) 
                                            NSLog(@"User now has read and publish permissions!");
                                            [self publishFBPost];
                                        
    ];

这里是发帖的地方：

-(void) publishFBPost
        FBSDKShareLinkContent *content = [FBSDKShareLinkContent new];
        content.contentURL = [NSURL URLWithString:[self.selectedSegment valueForKey:@"linkToContent"]];
        content.contentTitle = [self.selectedProgram valueForKey:@"programTitle"];
        content.contentDescription = [self.selectedSegment valueForKey:@"purposeSummary"];

    PFFile *theImage = [self.selectedSegment valueForKey:@"segmentImage"];
    NSString *urlString = theImage.url;
    NSURL *url = [NSURL URLWithString:urlString];
    content.imageURL = url;

    FBSDKShareDialog *shareDialog = [FBSDKShareDialog new];

    [shareDialog setMode:FBSDKShareDialogModeAutomatic];
//    [FBSDKShareDialog showFromViewController:self.messageTableViewController withContent:content delegate:self];
    [shareDialog setShareContent:content];
    [shareDialog setDelegate:self];
    [shareDialog setFromViewController:self.messageTableViewController];
    [shareDialog show];

以下委托方法不起作用。意思是贴完后，我可以在FB账号上看到，但是这些委托方法都没有执行。

#pragma mark - delegate methods

- (void)sharer:(id<FBSDKSharing>)sharer didCompleteWithResults:(NSDictionary *)results 
//    if ([sharer isEqual:self.shareDialog]) 
        NSLog(@"I'm going to go crazy if this doesn't work.%@",results);

        // Your delegate code
//    


    - (void)sharer:(id<FBSDKSharing>)sharer didFailWithError:(NSError *)error
    
        NSLog(@"sharing error:%@", error);
        NSString *message = error.userInfo[FBSDKErrorLocalizedDescriptionKey] ?:
        @"There was a problem sharing, please try again later.";
        NSString *title = error.userInfo[FBSDKErrorLocalizedTitleKey] ?: @"Oops!";

        [[[UIAlertView alloc] initWithTitle:title message:message delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
    

    - (void)sharerDidCancel:(id<FBSDKSharing>)sharer
    
        NSLog(@"share cancelled");
    

控制台输出： 发布后我收到的唯一消息是几秒钟后出现此消息：

plugin com.apple.share.Facebook.post invalidated

请帮忙！

脚注：appDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 

    // Initialize Parse.
    [Parse enableLocalDatastore];
    [Parse setApplicationId:@"XXXX"
                  clientKey:@"XXX"];
    [PFFacebookUtils initializeFacebookWithApplicationLaunchOptions:launchOptions];


    //Initialize Facebook
    [FBSDKAppEvents activateApp];
    return [[FBSDKApplicationDelegate sharedInstance] application:application didFinishLaunchingWithOptions:launchOptions];



//Method added for facebook integration
- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation 
    return [[FBSDKApplicationDelegate sharedInstance] application:application
                                                          openURL:url
                                                sourceApplication:sourceApplication
                                                       annotation:annotation];


- (void)applicationDidBecomeActive:(UIApplication *)application 
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
    [FBSDKAppEvents activateApp];

【参考方案1】：

我认为我回答这个问题为时已晚，但其他人也可能陷入困境，这就是分享我的知识的原因。

As per Facebook API documentation

sharer:didCompleteWithResults: Sent to the delegate when the share completes without error or cancellation.
The results from the sharer. This may be nil or empty.

这可能是因为只有在帖子成功共享时才会调用此委托方法。如果失败，则调用另一个委托方法sharer:didFailWithError:get。我认为 Facebook API 不需要添加 result 参数就是这种情况。

所以根据我的经验，如果 sharer:didCompleteWithResults 每当调用它就意味着成功。

【讨论】：

我已经测试了很多案例，并且sharer:didCompleteWithResults被调用并不意味着帖子已经发布成功。您可以打开共享对话框并按“完成”按钮或“关闭”按钮取消发布，仍然看到 sharer:didCompleteWithResults 方法已被调用。