使用 Facebook 登录 iOS

Login with Facebook for iOS

提问by iMash

I have application that is already running on iOS 5 as well as iOS 6. Now for next step I want to implement functionality of "Login with Facebook".

我有已经在 iOS 5 和 iOS 6 上运行的应用程序。现在下一步我想实现“使用 Facebook 登录”的功能。

My application already has login authentication so the facebook login will be additional one.I knew that iOS 6 has provided new framework for facebook but I have two questions:

我的应用程序已经有登录身份验证，所以 facebook 登录将是额外的。 我知道 iOS 6 为 facebook 提供了新的框架，但我有两个问题：

1. How do I implement this facebook functionality, so that it should work on both iOS 5 and iOS 6 devices? 2.How do I maintain session with facebook login?

1. 我如何实现这个 facebook 功能，以便它可以在 iOS 5 和 iOS 6 设备上运行？2.如何与facebook登录保持会话？

回答by barryjones

1) Follow these steps for facebook login instructions: https://developers.facebook.com/docs/howtos/login-with-facebook-using-ios-sdk/

1) 按照以下步骤获取 facebook 登录说明：https: //developers.facebook.com/docs/howtos/login-with-facebook-using-ios-sdk/

2) Once you implement the above using facebook sdk 3.x, this will also work for iOS 5 and iOS 6.

2) 一旦您使用 facebook sdk 3.x 实现了上述内容，这也适用于 iOS 5 和 iOS 6。

回答by Shaik Riyaz

1.To support login in ios 5 and ios 6 , you can use FBLoginView Class . it is the simplest way to login into facebook using Facebook sdk .

1.支持ios 5和ios 6登录，可以使用FBLoginView类。这是使用 Facebook sdk 登录 facebook 的最简单方法。

    FBLoginView * pFBLoginViewObj = [[FBLoginView alloc] init];
    [pFBLoginViewObj setFrame:self.view.frame];
    pFBLoginViewObj.delegate = self;//optional
    [self.view addSubview:pFBLoginViewObj];

implement delegate methods if needed .

如果需要，实现委托方法。

2.To maintain session you have to make changes in app dalagate file ....like

2.要保持会话，您必须在应用程序 dalagate 文件中进行更改....like

-(BOOL) application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    if (url != nil)
    {

        return [[FBSession activeSession] handleOpenURL:url];
    }

    return NO;
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{

    [[FBSession activeSession] handleDidBecomeActive];
}
- (void)applicationWillTerminate:(UIApplication *)application
{
    [[FBSession activeSession] close];
}

回答by User558

First of all we have to add this frameworks in our projects,

首先我们必须在我们的项目中添加这个框架，

after that you can import this methods in appDelegate

之后，您可以在 appDelegate 中导入此方法

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

after that didFinishLaunchingWithOptions we have to add this method

在 didFinishLaunchingWithOptions 之后我们必须添加这个方法

[[FBSDKApplicationDelegate sharedInstance] application:application
                         didFinishLaunchingWithOptions:launchOptions];

you can call Callback Methods,

你可以调用回调方法，

#pragma mark - Callback 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];
}

after that in your facebooklogin action method we have to write,

之后，在您的 facebooklogin 操作方法中，我们必须编写，

FBSDKLoginManager *loginManager = [[FBSDKLoginManager alloc] init];
        [loginManager logInWithReadPermissions:@[@"public_profile", @"email"] fromViewController:self handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
            //TODO: process error or result.
            if (error) {
                NSLog(@"Process error");
                [self facebookLoginFailed:YES];
            } else if (result.isCancelled) {
                [self facebookLoginFailed:NO];
            } else {
                if ([FBSDKAccessToken currentAccessToken]) {
                    NSLog(@"Token is available : %@",[[FBSDKAccessToken currentAccessToken]tokenString]);
                    NSMutableDictionary* parameters = [NSMutableDictionary dictionary];
                    [parameters setValue:@"id,name,email,first_name,last_name,picture.type(large)" forKey:@"fields"];
                    [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:parameters]
                     startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
                         if (!error) {
                             NSString *fbPhotoUrl = [[[result objectForKey:@"picture"]objectForKey:@"data"]objectForKey:@"url"];
                             lDefaults = [NSUserDefaults standardUserDefaults];
                             [lDefaults setObject:@"fbPhotoUrl" forKey:@"fbPhotoUrl"];
                             [lDefaults synchronize];
                             NSLog(@"%@",fbPhotoUrl);
                         }
                     }];
                }
                else {
                    [self facebookLoginFailed:YES];
                }
            }
        }]; 

if facebook login failed we can write this alert,

如果 facebook 登录失败，我们可以写这个警报，

- (void)facebookLoginFailed:(BOOL)isFBResponce{
if(isFBResponce){
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:NSLocalizedString(@"pop_attention", nil) message:NSLocalizedString(@"request_error", nil) delegate:self cancelButtonTitle:NSLocalizedString(@"pop_ok", nil) otherButtonTitles: nil];
    [alert show];
}
else{
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:NSLocalizedString(@"pop_attention", nil) message:NSLocalizedString(@"loginfb_cancelled", nil) delegate:self cancelButtonTitle:NSLocalizedString(@"pop_ok", nil) otherButtonTitles: nil];
    [alert show];
}
}

after that goto target-->info-->Url Types-->UrlSchmes(add your facebook id).

之后转到目标--> 信息--> Url 类型--> UrlSchmes（添加您的 facebook id）。

and more thing we have to do in www.developers.facebook.com go to ypur app-->under AppReview-->Make YourApp public? as YES.

还有更多我们必须在 www.developers.facebook.com 上做的事情，请转到 ypur 应用程序--> 在 AppReview 下--> 将您的应用程序设为公开？是的。

after that we need to add tis code in plist

之后我们需要在plist中添加tis代码

<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>fb1801381186770425</string>
        </array>
    </dict>
</array>
<key>FacebookAppID</key>
<string>AddYourID</string>
<key>FacebookDisplayName</key>
<string>YourAppName</string>
<key>LSApplicationQueriesSchemes</key>
<array>
    <string>fbapi</string>
    <string>fb-messenger-api</string>
    <string>fbauth2</string>
    <string>fbshareextension</string>
    <string>instagram</string>
</array>
<key>NSLocationWhenInUseUsageDescription</key>
<string>To access your current location</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>To share </string> 

that's it in Objective-C.

在Objective-C中就是这样。

In SwiftVersion

在Swift版本中

In appdelegate method we need to import this frameworks

在 appdelegate 方法中，我们需要导入这个框架

import FacebookCore
import FacebookLogin
import FBSDKLoginKit

after that in didFinishLaunchingWithOptions write

之后在 didFinishLaunchingWithOptions 中写入

FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

and call callback method

并调用回调方法

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

after that in your viewcontroller import same frameworks after that write thiese lines of code in your facebook login action

之后在您的视图控制器中导入相同的框架，然后在您的 facebook 登录操作中编写这些代码行

var dict : [String : AnyObject]!

let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()
    fbLoginManager.logIn(withReadPermissions: ["email"], from: self) { (result, error) in
        if (error == nil){
            let fbloginresult : FBSDKLoginManagerLoginResult = result!
            if fbloginresult.grantedPermissions != nil {
                if(fbloginresult.grantedPermissions.contains("email")) {
                    self.getFBUserData()
                }
            }
        }
    }

after that i am getting user data and storing in Dictionary

之后我正在获取用户数据并存储在字典中

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){
                self.dict = result as! [String : AnyObject]
                print(result!)
                print(self.dict)
            }
        })
    }
} 

回答by Usman

https://developers.facebook.com/features/whats-new-ios-sdk-3.1/

https://developers.facebook.com/features/whats-new-ios-sdk-3.1/

Take a look at this Facebook sdk work for both iOS5 and iOS6 as well.

看看这个 Facebook sdk 也适用于 iOS5 和 iOS6。