Question

我想在关注this guide后自定义Facebook登录按钮。一切都正确集成，我可以登录Facebook，并顺利登出。

现在我的下一个目标是使屏幕看起来像我的模拟，这包括在故事板上正确放置登录按钮，但唯一的问题是它没有出现在故事板上，它只是出现在我运行模拟。我查看了其他溢出的答案，但它们并没有真正有用，因为它们面向早期版本的swift / Xcode，并且没有根据评论所说的工作。我的代码与指南完全相同，因为这是我尝试实现的第一个屏幕。

非常感谢帮助。

Answer 1

如果您想使用自定义Facebook SDK按钮，您可以在故事板中创建任何自定义按钮，并在viewcontroller中提供此类操作

在顶部导入

import FBSDKCoreKit
import FBSDKLoginKit

斯威夫特3：

  @IBAction func loginFacebookAction(sender: AnyObject) {//action of the custom button in the storyboard
    let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()
    fbLoginManager.logIn(withReadPermissions: ["email"], from: self) { (result, error) -> Void in
      if (error == nil){
        let fbloginresult : FBSDKLoginManagerLoginResult = result!
        // if user cancel the login 
        if (result?.isCancelled)!{
                return
        }
        if(fbloginresult.grantedPermissions.contains("email"))
        {
          self.getFBUserData()
        }
      }
    }
  }

  func getFBUserData(){
    if((FBSDKAccessToken.current()) != nil){
      FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).start(completionHandler: { (connection, result, error) -> Void in
        if (error == nil){
          //everything works print the user data
          print(result)
        }
      })
    }
  }

较旧的Swift版本：

 @IBAction func loginFacebookAction(sender: AnyObject) {//action of the custom button in the storyboard
        let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()
        fbLoginManager.logInWithReadPermissions(["email"], fromViewController: self) { (result, error) -> Void in
            if (error == nil){
                let fbloginresult : FBSDKLoginManagerLoginResult = result
                if(fbloginresult.grantedPermissions.contains("email"))
                {
                    self.getFBUserData()
                }
            }
        }
    }

    func getFBUserData(){
        if((FBSDKAccessToken.currentAccessToken()) != nil){
            FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).startWithCompletionHandler({ (connection, result, error) -> Void in
                if (error == nil){
                    //everything works print the user data
                    print(result)
                }
            })
        }
    }

如果您想要默认的Facebook登录按钮，您可以在身份检查器中使用UIView并设置自定义类**部分的Class *字段，我们必须设置FBLoginValue

参考：默认SDK登录按钮教程：http://www.appcoda.com/ios-programming-facebook-login-sdk/

参考：参数的自定义SDK登录按钮和更多信息：https://developers.facebook.com/docs/facebook-login/ios

Answer 2

POD INSTALL

source 'https://github.com/CocoaPods/Specs.git'
use_frameworks!
target “ProjectName” do
  pod 'FacebookCore'
  pod 'FacebookLogin'
  pod 'FacebookShare'
end

AppDelegate.swift

import FacebookLogin
import FBSDKLoginKit
import FacebookCore

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
    return true
}

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

ViewController.swift

import UIKit
import FacebookLogin
import FBSDKLoginKit
import FacebookCore

class ViewController: UIViewController {

override func viewDidLoad() {
    if(FBSDKAccessToken.current() == nil){
        print("Not logged in ")
    }else{
        print("Logged in already")
        getFacebookUserInfo()
    }
}

@IBAction func CustomButton_Click(_ sender: Any) {
    getFacebookUserInfo()
}

func getFacebookUserInfo(){
    let loginManager = LoginManager()
    loginManager.logIn([.publicProfile, .email ], viewController: self) { (result) in
        switch result{
        case .cancelled:
            print("Cancel button click")
        case .success:
            let params = ["fields" : "id, name, first_name, last_name, picture.type(large), email "]
            let graphRequest = FBSDKGraphRequest.init(graphPath: "/me", parameters: params)
            let Connection = FBSDKGraphRequestConnection()
            Connection.add(graphRequest) { (Connection, result, error) in
                let info = result as! [String : AnyObject]
                print(info["name"] as! String)
            }
            Connection.start()
        default:
            print("??")
        }
    }
}
}

的Info.plist

Info.plist - ＆gt;右键单击 - ＆gt; OpenAs - ＆gt;源代码 - ＆gt;添加＆lt; dict＆gt; ..＆lt; / dict＆gt;

<key>CFBundleURLTypes</key>
    <array>
        <dict>
            <key>CFBundleURLSchemes</key>
            <array>
                <string>YOUR APP ID</string>
            </array>
        </dict>
    </array>
    <key>FacebookAppID</key>
    <string>YOUR APP ID</string>
    <key>FacebookDisplayName</key>
    <string>YOUR APP NAME</string>

Answer 3

@IBAction函数按钮登录（_发件人：任意）{

    let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()

    fbLoginManager.logIn(withReadPermissions: ["public_profile","email"], from: self) { (result, error) in

        if (error == nil){
            let fbloginresult : FBSDKLoginManagerLoginResult = result!
            if fbloginresult.grantedPermissions != nil {
                if(fbloginresult.grantedPermissions.contains("email")) {
                    if((FBSDKAccessToken.current()) != nil){
                        FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).start(completionHandler: { (connection, result, error) -> Void in
                            if (error == nil){
                               let dict: NSDictionary = result as! NSDictionary
                                if let token = FBSDKAccessToken.current().tokenString {
                                    print("tocken: \(token)")

                                    let userDefult = UserDefaults.standard
                                    userDefult.setValue(token, forKey: "access_tocken")
                                    userDefult.synchronize()
                                }
                                if let user : NSString = dict.object(forKey:"name") as! NSString? {
                                    print("user: \(user)")
                                }
                                if let id : NSString = dict.object(forKey:"id") as? NSString {
                                    print("id: \(id)")
                                }
                                if let email : NSString = (result! as AnyObject).value(forKey: "email") as? NSString {
                                    print("email: \(email)")
                                }
                            }
                        })
                    }
                }
            }
        }
    }
 }

Answer 4

欢迎来到StackOverflow，Shika！该教程向您展示了如何添加Facebook提供的按钮作为其SDK的一部分。本教程告诉您将按钮置于设备屏幕中央。 Facebook允许您创建自己的按钮，如果您愿意。在我看来，我更喜欢它，因为你可以在故事板中使用它，不像在Swift中以编程方式创建的按钮。您可以使用Facebook文档here并向下滚动到“自定义登录按钮”。你的代码会改变，但不会太多！如果您选择此路线，请务必删除您复制并粘贴的代码以添加位于viewDidLoad中的按钮。此外，您可以删除在Swift文件顶部添加的FBSDKLoginButtonDelegate。

自定义Facebook登录按钮 - 集成后

4 个答案: