ios - 使用 native Facebook 帐户(在设置中)登录 Facebook，无需网页 View

Question

我使用 Swift 3 在 iOS 上创建了一个 Facebook 登录按钮，它可以工作，但我想知道如何让我的按钮不打开新的 Web View 页面来请求权限。我想向用户展示这个:

有人知道怎么做吗？

我到处搜索，但我不知道该怎么做。

Answer 1

下面的代码可帮助您提供已登录设备的用户的访问 token 。用户个人资料的此访问 token 可帮助您直接登录 Facebook。

在 AppDelegate 中:

func application(_ application: UIApplication,      didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool 
{
    return FBSDKApplicationDelegate .sharedInstance() .application(application, didFinishLaunchingWithOptions: launchOptions)
}

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool
{
    return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
}

在 View Controller 中:

import Social
import Accounts

@IBAction func fbLoginButton(_ sender: Any) 
{

    var facebookAccount: ACAccount?

    let accountStore = ACAccountStore()
    let accountType = accountStore.accountType(
        withAccountTypeIdentifier: ACAccountTypeIdentifierFacebook)

    let options = [ACFacebookAppIdKey: "YOUR_FB_APP_ID_KEY", ACFacebookPermissionsKey: ["public_profile","email"],ACFacebookAudienceKey:ACFacebookAudienceFriends] as [String : Any]

    let facebookAccountType = accountStore.accountType(withAccountTypeIdentifier: ACAccountTypeIdentifierFacebook)

    accountStore.requestAccessToAccounts(with: facebookAccountType, options: options) { (success, error) -> Void in
        if success
        {
            let accounts = accountStore.accounts(with: accountType)
            facebookAccount = accounts?.last as? ACAccount
            let accountsArray=accountStore.accounts(with: accountType) as NSArray
            facebookAccount=accountsArray.lastObject as? ACAccount

            print(facebookAccount!)

            var dict:NSDictionary
            dict=NSDictionary()
            dict=facebookAccount!.dictionaryWithValues(forKeys: ["properties"]) as NSDictionary
            let properties:NSDictionary=dict["properties"] as! NSDictionary
            print("facebook Response is ::::",properties)

            print((facebookAccount?.credential.oauthToken)!)

        }
        else
        {
            print("Access denied")
            print((error?.localizedDescription)!)

        }
    }

}