Facebook (iOS): Main Thread Checker: UI API called on a background thread: -[UIApplication canOpenURL:]

[leshik]

On iOS, I'm getting

Main Thread Checker: UI API called on a background thread: -[UIApplication canOpenURL:]

in XCode when "Sign In with Facebook" dialog pops up. Shouldn't we wrap LoginManager calls in DispatchQueue.main.async { }?

For me this solved the issue...

[moberwasserlechner]

Hi,

this plugin's iOS part was my first contact with Swift, so you're suggestions are very welcome.

Would it be possible for you to share the whole wrapping code, so I can change the docs.

thx & BR

[leshik]

I'm neither experienced with Swift, sorry – was just hit by the issue and then started looking for solutions at Stack Overflow.
I wrapped this part:

...
         DispatchQueue.main.async {
             self.loginManager!.logIn(readPermissions: [ ReadPermission.publicProfile ],
                                viewController: viewController, completion: { loginResult in
                                 switch loginResult {
                                 case .failed(let error):
                                     failure(error)
                                 case .cancelled:
                                     cancelled()
                                 case .success(let grantedPermissions, let declinedPermissions, let accessToken):
                                     success(accessToken.authenticationToken)
                                 }
             })
         }
...

[moberwasserlechner]

Tried the change with my app. FB still works. Thanks for this.