我正在嘗試使用Facebook登錄，它在登錄時成功，但不返回到應用程序

Question

此後我無法回到應用程序（如下圖所示），並且無法檢索任何用戶的數據。

我已經搜索，但沒有得到任何合適的答案給我的查詢。

登錄的圖片：

結束了像以下所示的畫面，不回來到應用程序，不存在用戶數據：

Answer 1

Step-1. Download latest Facebook SDK (it includes major changes). 

Step-2. Add FBSDKCoreKit.framework and FBSDKLoginKit.framework to 
     your project. 

Step-3. Now go to Project > Build Phases > add 
     SafariServices.framework 

Step-4. There are three changes in info.plist we need to verify. 

4.1 Make sure you have below in your info.plist file 



<key>CFBundleURLTypes</key> 
<array> 
    <dict> 
    <key>CFBundleURLSchemes</key> 
    <array> 
    <string><your fb id here eg. fbxxxxxx></string> 
    </array> 
    </dict> 
</array> 
    <key>FacebookAppID</key> 
    <string><your FacebookAppID></string> 
    <key>FacebookDisplayName</key> 
<string><Your_App_Name_Here></string> 

4.2 Now add below for White-list Facebook Servers, this is must for  iOS 9 

    <key>NSAppTransportSecurity</key> 
<dict> 
    <key>NSExceptionDomains</key> 
    <dict> 
    <key>facebook.com</key> 
    <dict> 
     <key>NSIncludesSubdomains</key> 
     <true/> 
     <key>NSExceptionRequiresForwardSecrecy</key> 
     <false/> 
    </dict> 
    <key>fbcdn.net</key> 
    <dict> 
     <key>NSIncludesSubdomains</key> 
     <true/> 
     <key>NSExceptionRequiresForwardSecrecy</key> 
     <false/> 
    </dict> 
    <key>akamaihd.net</key> 
    <dict> 
     <key>NSIncludesSubdomains</key> 
     <true/> 
     <key>NSExceptionRequiresForwardSecrecy</key> 
     <false/> 
    </dict> 
    </dict> 
</dict> 

4.3 Add URL schemes 
    <key>LSApplicationQueriesSchemes</key> 
    <array> 
     <string>fbapi</string> 
     <string>fb-messenger-api</string> 
     <string>fbauth2</string> 
     <string>fbshareextension</string> 
    </array> 
Step-5. Now open AppDelegate.m file 

5.1 Add below import statements 

#import <FBSDKLoginKit/FBSDKLoginKit.h> 
#import <FBSDKCoreKit/FBSDKCoreKit.h> 

5.2 update following following methods 



- (BOOL)application:(UIApplication *)application 
      openURL:(NSURL *)url 
    sourceApplication:(NSString *)sourceApplication 
     annotation:(id)annotation { 
    return [[FBSDKApplicationDelegate sharedInstance] application:application 
                 openURL:url 
               sourceApplication:sourceApplication 
                 annotation:annotation]; 
} 

- (void)applicationDidBecomeActive:(UIApplication *)application { 
    [FBSDKAppEvents activateApp]; 
} 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
    return [[FBSDKApplicationDelegate sharedInstance] application:application 
            didFinishLaunchingWithOptions:launchOptions]; 
} 

Step-6. Now we need to modify our Login Controller, where we do Login task 

6.1 Add these imports in Login ViewController.m 

#import <FBSDKCoreKit/FBSDKCoreKit.h> 
#import <FBSDKLoginKit/FBSDKLoginKit.h> 

6.2 Add Facebook Login Button 

    FBSDKLoginButton *loginButton = [[FBSDKLoginButton alloc] init]; 
loginButton.center = self.view.center; 
[self.view addSubview:loginButton]; 

6.3 Handle Login button click 



-(IBAction)facebookLogin:(id)sender 
{ 
    FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init]; 

    if ([FBSDKAccessToken currentAccessToken]) 
    { 
     NSLog(@"Token is available : %@",[[FBSDKAccessToken currentAccessToken]tokenString]); 
     [self fetchUserInfo]; 
    } 
    else 
    { 
     [login logInWithReadPermissions:@[@"email"] fromViewController:self handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) 
     { 
      if (error) 
      { 
       NSLog(@"Login process error"); 
      } 
      else if (result.isCancelled) 
      { 
       NSLog(@"User cancelled login"); 
      } 
      else 
      { 
       NSLog(@"Login Success"); 

       if ([result.grantedPermissions containsObject:@"email"]) 
       { 
        NSLog(@"result is:%@",result); 
        [self fetchUserInfo]; 
       } 
       else 
       { 
        [SVProgressHUD showErrorWithStatus:@"Facebook email permission error"]; 

       } 
      } 
     }]; 
    } 
} 
6.4 Get user info (name, email etc.) 

    -(void)fetchUserInfo 
{ 
    if ([FBSDKAccessToken currentAccessToken]) 
    { 
     NSLog(@"Token is available : %@",[[FBSDKAccessToken currentAccessToken]tokenString]); 

     [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"id, name, email"}] 
     startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) { 
      if (!error) 
      { 
       NSLog(@"results:%@",result); 

       NSString *email = [result objectForKey:@"email"]; 
       NSString *userId = [result objectForKey:@"id"]; 

       if (email.length >0) 
       { 
        //Start you app Todo 
       } 
       else 
       { 
        NSLog(@「Facebook email is not verified"); 
       } 
      } 
      else 
      { 
       NSLog(@"Error %@",error); 
      } 
     }]; 
    } 
} 

Answer 2

整合了Facebook API和閱讀文檔here

這是一個示例代碼

if ([FBSDKProfile currentProfile]) //checking the login status 
{ 
    NSLog(@"User name: %@",[FBSDKProfile currentProfile].name); 
    NSLog(@"User ID: %@",[FBSDKProfile currentProfile].userID); 
} 

Answer 3

錯誤導致不因facebook集成。 它可能是viewDidLoad中顯示視圖的問題。將其更改爲viewDidAppear。是指複製@（whose view is not in the window hierarchy）