Question

我想在Facebook上分享图片，为此我做了：

let photo: FBSDKSharePhoto = FBSDKSharePhoto()
photo.image = croppedImage
photo.userGenerated = true
photo.caption = "Add Your caption"

let content: FBSDKSharePhotoContent = FBSDKSharePhotoContent()
content.photos = [photo]

FBSDKShareDialog.showFromViewController(self, withContent: content, delegate: nil)

但它没有显示我的ShareViewController。但是当我尝试这段代码时：

let content: FBSDKShareLinkContent = FBSDKShareLinkContent()
content.contentURL = NSURL(string: "http://")
content.contentTitle = "App Testing"
content.contentDescription = "I'm working over the app!"

如何修复第一个代码段？

Answer 1

我知道这是一个老问题，但万一有人面临同样的问题：

根据documentation，您需要安装原生Facebook应用才能使用FBSDKSharePhotoContent，在这种情况下您无法使用FBSDKShareDialog。

使用FBSDKShareDialog（仅支持FBSDKShareLinkContent）使用{em>几乎相同的结果的近似解决方法如下：

let content: FBSDKShareLinkContent = FBSDKShareLinkContent()
content.imageURL = URL(string: "www.example.com/my_image.jpg")
content.contentURL = URL(string: "www.example.com/target_url")
content.contentTitle = "My Title"
content.contentDescription = "My Description"

let dialog: FBSDKShareDialog = FBSDKShareDialog()
dialog.fromViewController = self
dialog.delegate = self      // make sure to conform to FBSDKSharingDelegate protocol
dialog.shareContent = content
if !dialog.canShow() {
    // fallback to non-native mode
    dialog.mode = .feedBrowser
}
dialog.show()

您可以找到协议的方法here。

Answer 2

仅在安装Facebook应用程序时才有效。另外，明确指定mode = .native。

let content = FBSDKSharePhotoContent()
    let photo = FBSDKSharePhoto(image: image, userGenerated: true)
    content.photos = [photo].flatMap({ $0 })

    let dialog = FBSDKShareDialog()
    dialog.fromViewController = viewController
    dialog.shareContent = content
    dialog.delegate = self
    dialog.mode = .native

    dialog.show()

如果没有，它将使用SLComposeViewController，您将收到错误

SLComposeViewController isAvailableForServiceType got serviceType com.apple.social.facebook isAvailable 0

良好的做法是在FBSDKShareDialog.m上进行调试，看看事情是否适合您

- (BOOL)show
{
  BOOL didShow = NO;
  NSError *error = nil;

  if ([self _validateWithError:&error]) {
    switch (self.mode) {
      case FBSDKShareDialogModeAutomatic:{
        didShow = [self _showAutomatic:&error];
        break;
      }
      case FBSDKShareDialogModeBrowser:{
        didShow = [self _showBrowser:&error];
        break;
      }
      case FBSDKShareDialogModeFeedBrowser:{
        didShow = [self _showFeedBrowser:&error];
        break;
      }
      case FBSDKShareDialogModeFeedWeb:{
        didShow = [self _showFeedWeb:&error];
        break;
      }
      case FBSDKShareDialogModeNative:{
        didShow = [self _showNativeWithCanShowError:&error validationError:&error];
        break;
      }
      case FBSDKShareDialogModeShareSheet:{
        didShow = [self _showShareSheetWithCanShowError:&error validationError:&error];
        break;
      }
      case FBSDKShareDialogModeWeb:{
        didShow = [self _showWeb:&error];
        break;
      }
    }
  }
  if (!didShow) {
    [self _invokeDelegateDidFailWithError:error];
  } else {
    [self _logDialogShow];
    [FBSDKInternalUtility registerTransientObject:self];
  }
  return didShow;
}

获得的经验：

了解FB的变化。
每天早上检查更改日志
今天有效的事情可能明天无效

为什么FBSDK共享对话框不适用于图像附件？

2 个答案: