【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】：
标签： ios xcode facebook image facebook-graph-api