Why FBSDK Share Dialog does not work with image attachment? - ios

Question

I want to share image on Facebook, for this I do:
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)
but it does not show me ShareViewController. But when I'm trying this code:
let content: FBSDKShareLinkContent = FBSDKShareLinkContent()
content.contentURL = NSURL(string: "http://")
content.contentTitle = "App Testing"
content.contentDescription = "I'm working over the app!"
How can I fix the first snippet?

Answer 1

I know this is an old question but just in case anyone faces the same issue:
According to the documentation, You need the native Facebook app to be installed in order to use FBSDKSharePhotoContent and you cannot use FBSDKShareDialog in that case.
A close workaround to achieve almost the same result is using FBSDKShareDialog (which only supports FBSDKShareLinkContent) as follows:
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()
You can find the protocol's methods here.

Answer 2

It only works when Facebook app is installed. Also, specify mode = .native explicitly.
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()
If not, it will use SLComposeViewController, and you will get error
SLComposeViewController isAvailableForServiceType got serviceType com.apple.social.facebook isAvailable 0
Good practice is to debug on FBSDKShareDialog.m to see if things don't work for you
- (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;
}
Lesson learned:
Be aware of FB changes.
Check for change log every morning
Things that work today may not work tomorrow