Facebook iOS Swift SDK: Not getting callback - ios

Question

I'm using the facebook getting started guide to create a simple facebook login. (https://developers.facebook.com/docs/swift/login)
Whenever I tap the button it opens the facebook login view, lets me log in but afterwards doesn't fire a callback. The view just stays open and white.
let loginButton = LoginButton(readPermissions: [ .publicProfile ])
loginButton.center = view.center
view.addSubview(loginButton)
All I'm getting in the console is the following, if that's of any help:
2016-09-27 01:14:41.294 app[48118:6370539] -canOpenURL: failed for URL: "fbauth2:/" - error: "The operation couldn’t be completed. (OSStatus error -10814.)"

Answer 1

Turns out I was missing the AppDelegate part to handle url opens:
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
return SDKApplicationDelegate.shared.application(application,
open: url,
sourceApplication: sourceApplication,
annotation: annotation)
}

Answer 2

You have to allow Key-Chain sharing for iOS10: https://stackoverflow.com/a/39568942/3463712
and you have to add below code in your info.plist file
<key>NSAppTransportSecurity</key>
<dict>
<!--Include to allow all connections (DANGER)-->
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>
and also
<key>LSApplicationQueriesSchemes</key>
<array>
<string>fbapi</string>
<string>fb-messenger-api</string>
<string>fbauth2</string>
<string>fbshareextension</string>
</array>
<!--You need only fbauth2, other parameters are reference for more functionality of Facebook-->
Do this and let me know if your problem solves. Thanks.
EDIT:
May be problem is in your loginbutton.
below code is working fine for me.
let loginbtn = FBSDKLoginButton()
loginbtn.center = view.center
loginbtn.readPermissions = ["public_profile"];
self.view.addSubview(loginbtn)