我有一个iPad应用程序，专为在自助服务终端环境中使用而设计。
用户流程应为
我自动注销Twitter工作正常，我的问题是Facebook部分。
我已经实现了用于内部测试的Graph API，并且希望能够以这种方式发布完整的故事，但我不认为一旦获得授权，就有办法从Facebook应用程序注销帖子已经完成。
对于后备，我可以使用Feed对话框并从那里自动注销，但据我所知，没有办法从那里上传本地图像以便与Facebook共享。
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;
}
我已经搜索了Stack Overflow以获得答案，但没有找到解决方案。
答案 0 :(得分：1)
我终于弄清楚了！在这里发布答案，希望有利于处于相同情况的其他人。
首先，将以下内容添加到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];
}
}];
}
无论您何时在应用中调用发布操作，请将此行添加到您的标题文件中：
@property (strong, nonatomic) FBRequestConnection *requestConnection;
以下是您的实施文件：
@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：
要使此功能与自动注销一起使用，您还必须在设备上禁用Safari。这可以通过转到设置＆gt;来完成。一般＆gt;限制＆gt;允许Safari＆gt;关闭。一旦关闭，Facebook IBAction将在应用程序内部弹出UIWebView。点击后，当前用户可以输入他们的Facebook凭据，然后应用程序将发布图像，并将用户注销，以便下一个用户可以使用该应用程序，而无需访问以前用户的Facebook详细信息。