我一直在努力使用Swift将Parse的Facebook登录功能实施到我的应用程序中超过一个月,并且似乎无法解决这个问题。我成功地将我的应用程序分别链接到Facebook和Parse,但我无法使用Facebook登录来创建Parse用户。我相信AppDelegate设置正确,所以我只会展示我的LoginViewController,希望有人知道他们正在做什么可以帮助我:
import UIKit
import Parse
import FBSDKCoreKit
import FBSDKLoginKit
protocol LoginViewControllerDelegate {
func onRegister(loginViewController : LoginViewController)
func onFacebookLogin(loginViewController : LoginViewController)
func onLogin(loginViewController : LoginViewController)
}
class LoginViewController: UIViewController, FBSDKLoginButtonDelegate {
//MARK: - Outlets
@IBOutlet weak var lblStatus: UILabel!
//var delegate : LoginViewControllerDelegate?
// Set permissions required from the facebook user account
let permissions = [ "user_about_me", "user_relationships", "user_location", "user_birthday", "public_profile", "user_friends", "user_email", "user_gender"]
//MARK: - Initial Load
override func viewDidLoad() {
super.viewDidLoad()
self.lblStatus.alpha = 0
//Facebook
if (FBSDKAccessToken.currentAccessToken() != nil)
{
// User is already logged in, do work such as go to next view controller.
}
else
{
let loginView : FBSDKLoginButton = FBSDKLoginButton()
// self.view.addSubview(loginView)
// loginView.center = self.view.center
// loginView.readPermissions = ["public_profile", "email", "user_friends"]
loginView.delegate = self
}
// ---------------------------- Check if user is logged in ---------------------
if PFUser.currentUser() != nil {
println("parse: User already logged in")
performSegueWithIdentifier("loggedIn", sender: self)
}
}
//MARK: - Facebook Login Button
func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {
if ((error) != nil) {
println(error) // Process error
} else if result.isCancelled { // Handle cancellations
} else {
// If you ask for multiple permissions at once, you
// should check if specific permissions missing
if result.grantedPermissions.contains("email")
{
// Do work
}
}
returnUserData()
}
@IBAction func facebookLoginDidPress(sender: AnyObject) {
self.lblStatus.alpha = 0
PFFacebookUtils.logInInBackgroundWithReadPermissions(self.permissions, block: {
(user: PFUser?, error: NSError?) -> Void in
if (user == nil) {
if (error == nil) {
println("User cancelled FB login")
self.lblStatus.alpha = 1
}else{
println("FB login error: \(error)")
self.lblStatus.alpha = 1
}
} else if user!.isNew {
println("User signed up and logged in with Facebook! \(user)")
self.requestFacebook()
self.returnUserData()
self.performSegueWithIdentifier("loggedIn", sender: self)
} else {
println("User logged in via Facebook \(user)")
self.performSegueWithIdentifier("loggedIn", sender: self)
}
})
}
func requestFacebook() {
let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: nil)
graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in
if ((error) != nil)
{
// Process error
println("Error: \(error)")
}
else if error == nil
{
var userData: NSDictionary = NSDictionary(objectsAndKeys: result)
var facebookID: AnyObject? = userData["id"]
var name: AnyObject? = userData["first_name"]
var gender: AnyObject? = userData["gender"]
var birthday: AnyObject? = userData["birthday"]
var pictureURL = "https://graph.facebook.com/\(facebookID)/picture?type=large&return_ssl_resources=1"
var URLRequest = NSURL(string: pictureURL)
var URLRequestNeeded = NSURLRequest(URL: URLRequest!)
NSURLConnection.sendAsynchronousRequest(URLRequestNeeded, queue: NSOperationQueue.mainQueue(), completionHandler: {(response: NSURLResponse!,data: NSData!, error: NSError!) -> Void in
if error == nil {
var picture = PFFile(data: data)
PFUser.currentUser()!.setObject(picture, forKey: "profilePicture")
PFUser.currentUser()!.saveInBackground()
}
else {
println("Error: \(error.localizedDescription)")
}
})
}
})
}
func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {
println("User Logged Out")
}
func returnUserData()
{
let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: nil)
graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in
if ((error) != nil)
{
// Process error
println("Error: \(error)")
}
else
{
if let userName : NSString = result.valueForKey("name") as? NSString {
println("User Name is: \(userName)")
} else {println("No username fetched")}
if let userEmail : NSString = result.valueForKey("email") as? NSString {
println("User Email is: \(userEmail)")
} else {println("No email address fetched")}
if let userGender : NSString = result.valueForKey("gender") as? NSString {
println("User Gender is: \(userGender)")
} else {println("No gender fetched") }
}
})
}
}
要做的一些重要说明:
我使用的是最新版本的Parse(1.7.4)和FBSDK(4.1),因此我在网上找到的大多数其他方法都不再适用,因为从那时起某些功能或成员已被删除
" func loginButton"是我用于FBSDKLoginButton,而#34; @IBAction func facebookLoginDidPres"是我尝试用于登录的常规UIButton。基于我最近学到的东西,我相信UIButton方法是我应该使用的方法,但是那个方法会导致线程1:Signal SIGABRT错误说明:
由于未捕获的异常终止应用程序' NSInvalidArgumentException',原因:' + [PFFacebookUtils logInInBackgroundWithReadPermissions:block:]:无法识别的选择器发送到类0x10ed3ed80' ***首先抛出调用堆栈:
...
libc ++ abi.dylib:以NSException类型的未捕获异常终止 (lldb)""
所以我放置了一个异常断点,它结束于" logInInBackgroundWithReadPermissions"在我的IBAction中使用控制台说明:
" [PFFacebookUtils logInInBackgroundWithReadPermissions:block:]:无法识别的选择器发送到类0x10dbe2db0(lldb)"
我会永远感激能够帮助我解决这个问题的人,这个问题让我困惑了很长时间。提前谢谢!
答案 0 :(得分:2)
我删除了旧的PFFacebookUtils框架,但保留了PFFacebookUtilsV4框架,这解决了我的问题!希望这可以帮助其他人解决这个问题:)
答案 1 :(得分:1)
我遇到同样的问题,我的解决方案是定义Login behavior = Web
PFFacebookUtils.facebookLoginManager().loginBehavior = FBSDKLoginBehavior.Web
当我在调用loginInBackground之前调用它时...,在单击“确定”按钮后,我的应用程序收到了用户回拨(不是nil),PFUser.currentUser随该用户更新。