上传 Facebook 照片和自动注销用户（自助服务终端应用程序）
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【中文标题】上传 Facebook 照片和自动注销用户（自助服务终端应用程序）【英文标题】：Upload Facebook Photo And Auto Log User Out (Kiosk App) 【发布时间】：2014-03-11 16:50:37 【问题描述】：我有一个 iPad 应用程序，专为在信息亭环境中使用而设计。
用户流应该是
拍照 从 iPad 相册视图中选择照片 分享到 Facebook 和/或 Twitter 图片发布后自动注销用户我的 Twitter 自动注销功能正常，我的问题在于 Facebook 部分。
我已经实现了用于内部测试的 Graph API，并且希望能够通过这种方式发布完整的故事，但我认为一旦授权和发布完成，我认为没有办法从 Facebook 应用程序中注销完成。
作为备用方案，我可以使用 Feed Dialog 并从那里自动注销，但据我所知，没有办法从那里上传本地图片以分享到 Facebook。
我的Facebook分享代码如下：
- (IBAction)facebookShare:(id)sender
/// Package the image inside a dictionary
NSArray* image = @[@@"url": self.mergeImages, @"user_generated": @"true"];
// Create an object
id<FBGraphObject> object =
[FBGraphObject openGraphObjectForPostWithType:@"me/feed:photo"
title:@"a photo"
image:self.mergeImages
url:nil
description:nil];
// Create an action
id<FBOpenGraphAction> action = (id<FBOpenGraphAction>)[FBGraphObject graphObject];
// Set image on the action
[action setObject:image forKey:@"image"];
// Link the object to the action
[action setObject:object forKey:@"photo"];
// Hardcode the location based on Facebook Place ID
id<FBGraphplace> place = (id<FBGraphPlace>)[FBGraphObject graphObject];
[place setId:@"279163865580772"]; // Singley + Mackie
[action setPlace:place];
// Check if the Facebook app is installed and we can present the share dialog
FBOpenGraphActionShareDialogParams *params = [[FBOpenGraphActionShareDialogParams alloc] init];
params.action = action;
params.actionType = @"me/feed:share";
// If the Facebook app is installed and we can present the share dialog
if([FBDialogs canPresentShareDialogWithOpenGraphActionParams:params])
// Show the share dialog
[FBDialogs presentShareDialogWithOpenGraphAction:action
actionType:@"photo_overlay:share"
previewPropertyName:@"photo"
handler:^(FBAppCall *call, NSDictionary *results, NSError *error)
if(error)
// An error occurred, we need to handle the error
// See: https://developers.facebook.com/docs/ios/errors
// NSLog([NSString stringWithFormat:@"Error publishing story: %@", error.description]);
else
// Success
NSLog(@"result %@", results);
];
// If the Facebook app is NOT installed and we can't present the share dialog
else
// Put together the Feed dialog parameters
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
@"name",
@"caption",
@"description",
@"link",
@"picture",
nil];
// Show the feed dialog
[FBWebDialogs presentFeedDialogModallyWithSession:nil
parameters:params
handler:^(FBWebDialogResult result, NSURL *resultURL, NSError *error)
if (error)
// An error occurred, we need to handle the error
// See: https://developers.facebook.com/docs/ios/errors
// NSLog([NSString stringWithFormat:@"Error publishing story: %@", error.description]);
else
if (result == FBWebDialogResultDialogNotCompleted)
// User cancelled.
NSLog(@"User cancelled.");
else
// Handle the publish feed callback
NSDictionary *urlParams = [self parseURLParams:[resultURL query]];
if (![urlParams valueForKey:@"post_id"])
// User cancelled.
NSLog(@"User cancelled.");
else
// User clicked the Share button
NSString *result = [NSString stringWithFormat: @"Posted story, id: %@", [urlParams valueForKey:@"post_id"]];
NSLog(@"result %@", result);
// Auto log the user out
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSLog(@"defaults fbDidLogout ........%@",defaults);
if ([defaults objectForKey:@"FBAccessTokenKey"])
[defaults removeObjectForKey:@"FBAccessTokenKey"];
[defaults removeObjectForKey:@"FBExpirationDateKey"];
[defaults synchronize];
NSHTTPCookie *cookie;
NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
for (cookie in [storage cookies])
NSString* domainName = [cookie domain];
NSRange domainRange = [domainName rangeOfString:@"facebook"];
if(domainRange.length > 0)
[storage deleteCookie:cookie];
[FBSession.activeSession closeAndClearTokenInformation];
];
// A function for parsing URL parameters.
- (NSDictionary*)parseURLParams:(NSString *)query
NSArray *pairs = [query componentsSeparatedByString:@"&"];
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
for (NSString *pair in pairs)
NSArray *kv = [pair componentsSeparatedByString:@"="];
NSString *val =
[kv[1] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
params[kv[0]] = val;
return params;
我已经在 Stack Overflow 上广泛搜索了这个问题的答案，但没有找到解决方案。
【问题讨论】：
【参考方案1】：我终于明白了！在这里发布答案，希望对处于相同情况的其他人有所帮助。
首先，将以下内容添加到您的 AppDelegate.m：
-(BOOL) application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
return [FBAppCall handleOpenURL:url sourceApplication:sourceApplication fallbackHandler:^(FBAppCall *call)
// Facebook SDK * App Linking *
// For simplicity, this sample will ignore the link if the session is already
// open but a more advanced app could support features like user switching.
if (call.accessTokenData)
if ([FBSession activeSession].isOpen)
NSLog(@"INFO: Ignoring app link because current session is open.");
else
[self handleAppLink:call.accessTokenData];
];
// Helper method to wrap logic for handling app links.
- (void)handleAppLink:(FBAccessTokenData *)appLinkToken
// Initialize a new blank session instance...
FBSession *appLinkSession = [[FBSession alloc] initWithAppID:nil
permissions:nil
defaultAudience:FBSessionDefaultAudienceNone
urlSchemeSuffix:nil
tokenCacheStrategy:[FBSessionTokenCachingStrategy nullCacheInstance] ];
[FBSession setActiveSession:appLinkSession];
// ... and open it from the App Link's Token.
[appLinkSession openFromAccessTokenData:appLinkToken
completionHandler:^(FBSession *session, FBSessionState status, NSError *error)
// Forward any errors to the FBLoginView delegate.
if (error)
//[self.loginViewController loginView:nil handleError:error];
];
无论您在应用中的何处调用发布操作，请将此行添加到您的头文件中：
@property (strong, nonatomic) FBRequestConnection *requestConnection;
以下是你的实现文件：
@synthesize requestConnection;
- (IBAction)facebookShare:(id)sender
NSArray *permissions = [[NSArray alloc] initWithObjects:
@"publish_actions", @"publish_checkins", nil];
UIImage *img = self.facebookImage;
[FBSession openActiveSessionWithPublishPermissions:permissions
defaultAudience:FBSessionDefaultAudienceEveryone allowLoginUI:YES
completionHandler:^(FBSession *session,FBSessionState s, NSError *error)
[FBSession setActiveSession:session];
if (!error)
// Now have the permission
[self processPostingImage:img WithMessage:@"Enter_your_message_here"];
else
// Facebook SDK * error handling *
// if the operation is not user cancelled
if (error.fberrorCategory != FBErrorCategoryUserCancelled)
[self presentAlertForError:error];
];
-(void)logout
[FBSession.activeSession closeAndClearTokenInformation];
[FBSession.activeSession close];
[FBSession setActiveSession:nil];
- (void)processPostingImage:(UIImage *) img WithMessage:(NSString *)message
FBRequestConnection *newConnection = [[FBRequestConnection alloc] init];
FBRequestHandler handler =
^(FBRequestConnection *connection, id result, NSError *error)
// output the results of the request
[self requestCompleted:connection forFbID:@"me" result:result error:error];
;
FBRequest *request=[[FBRequest alloc] initWithSession:FBSession.activeSession graphPath:@"me/photos" parameters:[NSDictionary dictionaryWithObjectsAndKeys:UIImageJPEGRepresentation(img, 0.7),@"source",message,@"message",@"'value':'EVERYONE'",@"privacy", nil] HTTPMethod:@"POST"];
[newConnection addRequest:request completionHandler:handler];
[self.requestConnection cancel];
self.requestConnection = newConnection;
[newConnection start];
// FBSample logic
// Report any results. Invoked once for each request we make.
- (void)requestCompleted:(FBRequestConnection *)connection
forFbID:fbID
result:(id)result
error:(NSError *)error
// not the completion we were looking for...
if (self.requestConnection &&
connection != self.requestConnection)
return;
// clean this up, for posterity
self.requestConnection = nil;
if (error)
else
[self logout];
;
- (void) presentAlertForError:(NSError *)error
// Facebook SDK * error handling *
// Error handling is an important part of providing a good user experience.
// When fberrorShouldNotifyUser is YES, a fberrorUserMessage can be
// presented as a user-ready message
if (error.fberrorShouldNotifyUser)
// The SDK has a message for the user, surface it.
[[[UIAlertView alloc] initWithTitle:@"Something Went Wrong"
message:error.fberrorUserMessage
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil] show];
else
注意：
要使用自动注销功能，您还必须在设备上禁用 Safari。这可以通过转到设置>常规>限制>允许Safari>关闭来完成。一旦关闭，Facebook IBAction 将在应用程序本身内弹出一个UIWebView。点击后，当前用户可以输入他们的 Facebook 凭据，然后该应用将发布图像，然后将用户注销，这样下一个用户就可以使用该应用，而无需访问前一个用户的 Facebook 详细信息。
【讨论】：
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