我在 swift 中有登录和注册代码，用于检查用户是否是新的登录和注册用户。这是我的代码：
登录
let spinningActivity = MBProgressHUD.showHUDAddedTo(self.view, animated: true)
spinningActivity.label.text = "Just a Moment"
spinningActivity.detailsLabel.text = "Logging in"
if reachabilityStatus == kNOTREACHABLE {
spinningActivity.hideAnimated(true)
self.displayError("No Internet Connection", message: "Please connect to the internet before continuing")
} else {
let permissions = ["public_profile"]
PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions) { (user:PFUser?, error:NSError?) -> Void in
if error != nil {
spinningActivity.hideAnimated(true)
self.displayError("Error", message: error!.localizedDescription)
} else if let user = user {
if user.isNew {
spinningActivity.hideAnimated(true)
PFUser.currentUser()?.deleteInBackground()
self.displayNoticeWithTwoActions("Account Not Found", message: "This Facebook account is not in our system. You have to sign up first.", firstButtonTitle: "Sign Up",closeButtonTitle: "Ok", segue: "dontHaveAccountSegue")
} else {
spinningActivity.hideAnimated(true)
self.performSegueWithIdentifier("successfulLoginSegue", sender: self)
}
} else {
PFUser.currentUser()?.deleteInBackground()
spinningActivity.hideAnimated(true)
self.displayError("Error", message: "Unless you tapped on 'Cancel' or 'Done', something went wrong. Please try again.")
}
}
}
报名
我有一个注册按钮，然后是一个在登录按钮中实现的功能，称为“loadFacebookUserDetails”
let spinningActivity = MBProgressHUD.showHUDAddedTo(self.view, animated: true)
spinningActivity.label.text = "Just a Moment"
spinningActivity.detailsLabel.text = "Loading Details"
if reachabilityStatus == kNOTREACHABLE {
spinningActivity.hideAnimated(true)
self.displayError("No Internet Connection", message: "Please connect to the internet before continuing")
} else {
let permissions = ["public_profile", "email"]
PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions) { (user:PFUser?, error:NSError?) -> Void in
if let user = user {
if !user.isNew {
spinningActivity.hideAnimated(true)
PFUser.logOut()
self.displayNoticeWithTwoActions("Account Found", message: "This Facebook account already in our system. You have to log in first.", firstButtonTitle: "Log In", closeButtonTitle: "Cancel", segue: "haveAccountSegue")
} else if error != nil {
spinningActivity.hideAnimated(true)
self.displayError("Error", message: error!.localizedDescription)
} else if error == nil {
spinningActivity.hideAnimated(true)
self.loadFacebookUserDetails()
}
}
else {
spinningActivity.hideAnimated(true)
self.displayError("Something Went Wrong", message: "Unless you tapped on 'Cancel' or 'Done', something went wrong. Please try again")
}
}
}
func loadFacebookUserDetails() {
let spinningActivity = MBProgressHUD.showHUDAddedTo(self.view, animated: true)
spinningActivity.mode = MBProgressHUDMode.AnnularDeterminate
spinningActivity.label.text = "Just a Moment"
spinningActivity.detailsLabel.text = "Loading Details"
let requestPerameters = ["fields": "id, email, first_name, last_name, name"]
let userDetails = FBSDKGraphRequest(graphPath: "me", parameters: requestPerameters)
userDetails.startWithCompletionHandler { (connection, result, error:NSError!) -> Void in
if error != nil {
spinningActivity.hideAnimated(true)
self.displayError("Error", message: error!.localizedDescription)
PFUser.logOut()
} else {
let userID:String = result["id"] as! String
let userEmail:String = result["email"] as! String
let userFirstName:String = result["first_name"] as! String
let userLastName:String = result["last_name"] as! String
// Get Facebook Profile Picture
let userProfile = "https://graph.facebook.com/" + userID + "/picture?type=large"
let usernameLink = "https://graph.facebook.com/" + userID
let username = usernameLink.stringByReplacingOccurrencesOfString("https://graph.facebook.com/", withString: "")
let profilePictureUrl = NSURL(string: userProfile)
let profilePictureData = NSData(contentsOfURL: profilePictureUrl!)
if profilePictureData != nil {
let profilePictureObject = PFFile(data: profilePictureData!)
PFUser.currentUser()?.setObject(profilePictureObject!, forKey: "profile_picture")
}
PFUser.currentUser()?.setObject(userFirstName, forKey: "first_name")
PFUser.currentUser()?.setObject(userLastName, forKey: "last_name")
PFUser.currentUser()?.setObject(username, forKey: "facebook_link")
if userEmail == userEmail {
PFUser.currentUser()?.email = userEmail
}
PFUser.currentUser()?.saveInBackgroundWithBlock({ (success:Bool, error:NSError?) -> Void in
if error != nil {
spinningActivity.hideAnimated(true)
self.displayError("Error", message: error!.localizedDescription)
PFUser.logOut()
} else if success == true {
if !userID.isEmpty {
spinningActivity.hideAnimated(true)
NSUserDefaults.standardUserDefaults().setObject("authData", forKey: "facebookAuth")
NSUserDefaults.standardUserDefaults().synchronize()
self.performSegueWithIdentifier("facebookUserDetailsSegue", sender: self)
}
} else {
spinningActivity.hideAnimated(true)
self.displayError("Something Went Wrong", message: "Please try again")
PFUser.logOut()
}
})
}
}
}
如果您在转换到目标 c 时遇到问题，我打赌您可以找到有关如何执行此操作的 YouTube 视频。