IOS Facebook SDK : what wrong with sharerDidCancel:(id<FBSDKSharing>)sharer delegate? - ios

Question

I use facebook sdk worked well except for delegate "sharerDidCancel:(id)sharer".
When i cancel my share with native dialog FB app, the delegate "sharer:(id)sharer didCompleteWithResults:(NSDictionary *)results" always called ? So i can't handle my users when they post or cancel the dialog share, is this a bug of Facebook SDK for IOS ?
Thanks for any helping!

Answer 1

I faced same issue during sharing in iOS 11. I have just changed native FB dialog to web dialog. As below:
Use below method:
dialog.mode = FBSDKShareDialogMode.feedWeb
instead of
dialog.mode = FBSDKShareDialogMode.native
Below is my code.It's work fine for me.
let content: FBSDKShareLinkContent = FBSDKShareLinkContent()
content.quote = "My Text"
content.contentURL = NSURL(string: String(format:"My Url"))! as URL!
let dialog: FBSDKShareDialog = FBSDKShareDialog()
dialog.fromViewController = self
dialog.shareContent = content
dialog.delegate = self
dialog.mode = FBSDKShareDialogMode.feedWeb
dialog.show()

Answer 2

I've just been digging through the Facebook SDK docs and found this:
sharer:didCompleteWithResults: when the user successfully shares. Furthermore there will also be a postId key in the results dictionary if the user gave the app publish_actions permissions. If that user has not logged in with Facebook Login, this method will also be called if the user clicks on Cancel.
So, unless you're logged in, checking cancel won't work (which is rubbish). Looks like you might be able to give some permissions and then check the postId though.

Answer 3

I found it is useful when you use FBSDKShareDialogModeWeb to share a link and FBSDKShareDialogModeNative to share a photo, then when you click cancel button, it will return to canceled delegate. But it only worked before iOS 9.1, and not support on iOS 9.1. I don't know why and how to solve it yet. Hope this answer is helpful.

Answer 4

I found a solution for this issue. Please match facebookdiplayname name in xcode plist and facebook developer account. If facebookdiplayname same then facebook delegate methods working right way.

Answer 5

I also have found that sharerDidCancel is never called when canceling.
You can do like Tejvansh suggested but checking if results is nil won't work because it's not nil when the user cancels, just empty.
The way I'm doing it is to check if the key "postId" exists, in which case the post was successful otherwise I assume the user canceled.
Swift example:
func sharer(sharer: FBSDKSharing!, didCompleteWithResults results: [NSObject : AnyObject]!) {
println("sharing results \(results)")
if results["postId"] != nil {
println("shared")
} else {
println("canceled")
}
}