Facebook登录错误无效范围：users_friends

Question

I have created an App using the Facebook Login and when I run the App I get this below error.

error: canOpenURL: failed for URL: "fbauth2:/" - error: "The operation couldn't be completed. (OSStatus error -10814.)"

class ViewController: UIViewController, FBSDKLoginButtonDelegate {

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    if(FBSDKAccessToken.current()==nil){
        print("Not Logged In")
    }
    else{
        print("Logged In..")
    }

    let loginButton = FBSDKLoginButton()
    loginButton.delegate = self
    loginButton.readPermissions = ["public_profile","email","users_friends"]
    loginButton.center = self.view.center
    self.view.addSubview(loginButton)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) {

    if(error == nil){
        print("login complete")

    }
    else{
        print(error.localizedDescription)
    }

}

func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) {
    print("Logged out..")
}
}

What I've got on Info.plist

The error I get on the App

Answer 1

It is user_friends not users_friends . Permissions Reference - Facebook Login

Answer 2

Add this line into your info.plist file.

<key>LSApplicationQueriesSchemes</key>
    <array>
        <string>fbapi</string>
        <string>fbapi20130214</string>
        <string>fbapi20130410</string>
        <string>fbapi20130702</string>
        <string>fbapi20131010</string>
        <string>fbapi20131219</string>
        <string>fbapi20140410</string>
        <string>fbapi20140116</string>
        <string>fbapi20150313</string>
        <string>fbapi20150629</string>
        <string>fbauth</string>
        <string>fbauth2</string>
        <string>fb-messenger-api20140430</string>
    </array>