iOS Facebook本地登录（不含Facebook SDK） [英] iOS Facebook native login (without Facebook SDK)

问题描述

我正在尝试使用本机（iOS 6-7x）库来授权用户从我的应用程序的Facebook。当登录成功时，我想将认证令牌传递到我的服务器。

I am trying to use native (iOS 6-7x) libraries to authorize a user with Facebook from my app. I would like to pass the auth token to my server when login is successful.

以下代码可以正常工作，除非用户尚未在操作系统中设置自己的Facebook帐户。在这种情况下，我收到以下错误：

The code below works fine except when the user has not set up their Facebook account in the OS. I get the following error in this case:

错误Domain = com.apple.accounts Code = 6操作无法完成（com.apple.accounts error 6。）

Error Domain=com.apple.accounts Code=6 "The operation couldn’t be completed. (com.apple.accounts error 6.)

-(void) initFacebookLogin
{
    LRAppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];

    if (appDelegate.accountStore == nil)
        appDelegate.accountStore = [[ACAccountStore alloc] init];

    __block ACAccount *facebookAccount = nil;

    ACAccountType *facebookAccountType = [appDelegate.accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];

    NSArray * permissions = @[@"publish_stream", @"publish_actions", @"email"];

    NSMutableDictionary *options = [[NSMutableDictionary alloc] initWithObjectsAndKeys:FACEBOOK_APP_ID, ACFacebookAppIdKey, permissions, ACFacebookPermissionsKey, ACFacebookAudienceOnlyMe, ACFacebookAudienceKey, nil];

    [appDelegate.accountStore requestAccessToAccountsWithType:facebookAccountType
        options: options
        completion: ^(BOOL granted, NSError *error) {

           if ( granted )
           {
               NSArray *accounts = [appDelegate.accountStore accountsWithAccountType:facebookAccountType];

               facebookAccount = [accounts lastObject];

               ACAccountCredential* accountCredential = [facebookAccount credential];

               NSString* token = [accountCredential oauthToken];

               NSLog( @"token=%@", token );
           }
           else {
               // WHAT DO I DO HERE???
               // Error Domain=com.apple.accounts Code=6 "The operation couldn’t be completed. (com.apple.accounts error 6.)"
               NSLog(@"%@", [error description]);
           }
       }];
}

我仍然需要使用Facebook SDK来要求用户登录？是否有另一个iOS本机库可以用来提示用户在iOS中设置Facebook访问？

Do I still need to use the Facebook SDK to ask the user to log in? Is there another iOS native library I could use to prompt the user to set up Facebook access in iOS?

或者，有没有更好的方法来做简化的Facebook认证（不要求用户登录，如果他们已经在操作系统中这样做）？

OR, is there a better way to do streamlined Facebook auth (not asking the user to log in if they have already done so in the OS)?

推荐答案

你应该看看这里的Facebook文档（有一个简单的登录示例）：

You should take a look at Facebook docs here (there's a simple login example):

https://developers.facebook.com/docs/ios / ios-sdk-tutorial / authenticate /

在我看来，我将使用Facebook SDK执行登录，可以这样做：

In my opinion, I would use the Facebook SDK to perform the login, you can do something like this:

/* Constants */
#define K_FACEBOOK_REQUEST_CREDENTIALSURL @"me/?fields=id,location,name,username,bio,picture,gender,website,birthday,email"
#define K_FACEBOOK_PERMISSIONS @[@"user_about_me",@"user_birthday",@"email"]

/* Facebook Keys */
#define K_FACEBOOK_REQUEST_ID @"id"
#define K_FACEBOOK_REQUEST_USERNAME @"username"
#define K_FACEBOOK_REQUEST_LOCATION @"location"
#define K_FACEBOOK_REQUEST_FULLNAME @"name"
#define K_FACEBOOK_REQUEST_BIO @"bio"
#define K_FACEBOOK_REQUEST_WEBSITE @"website"
#define K_FACEBOOK_REQUEST_EMAIL @"email"
#define K_FACEBOOK_REQUEST_BIRTHDAY @"birthday"
#define K_FACEBOOK_REQUEST_GENDER @"gender"

- (void)initWithLoginFacebook
{
  [PFFacebookUtils logInWithPermissions:K_FACEBOOK_PERMISSIONS block:^(PFUser *user, NSError *error) {
    if (!user) {
        if (!error) 
          NSLog("ERROR_CAUSE_AUTH_USERCANCELLED");
        else 
          NSLog("ERROR_CAUSE_AUTH_FAILEDLOGIN");
    } else if (user.isNew) {
        FBRequest *request = [FBRequest requestForMe];
        [request startWithCompletionHandler:^(FBRequestConnection *connection,id result,NSError *error) {
            if (error) 
              NSLog("ERROR_CAUSE_AUTH_FAILEDLOGIN");
            else 
              [self requestLoginFacebook:result];
        }];
    } else
        NSLog("User logged and not new!");
  }];
}

- (void)requestLoginFacebook:(id)result
 {
    NSDictionary *userData = (NSDictionary *)result;
    // Do something with the data... For example
    NSString *facebookId = userData[K_FACEBOOK_REQUEST_ID];
    NSString *name = userData[K_FACEBOOK_REQUEST_FULLNAME];
    NSString *username = [userData[K_FACEBOOK_REQUEST_USERNAME] lowercaseString];
    NSString *bio = userData[K_FACEBOOK_REQUEST_BIO];
    NSString *website = userData[K_FACEBOOK_REQUEST_WEBSITE];
    NSString *location = userData[K_FACEBOOK_REQUEST_LOCATION][@"name"];
    NSString *gender = userData[K_FACEBOOK_REQUEST_GENDER];
    NSString *birthday = userData[K_FACEBOOK_REQUEST_BIRTHDAY];
    NSString *email = userData[K_FACEBOOK_REQUEST_EMAIL];
    NSString *profileImage = [NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?width=180&height=180",userData[@"id"]];

}

您必须在appDelegate中配置Facebook SDK .plist文件。

You have to configure the Facebook SDK in the appDelegate and in the .plist file.

如果用户在设备设置中设置了一个Facebook帐户，您的代码只能工作正常。

Your code only will work fine if the user has a Facebook account set in the device Settings.

I。

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