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Calling Facebook APIs with the 3.0 SDK
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| // #1: Graph API: /me | |
| - (void)requestMe { | |
| [FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection, | |
| NSDictionary<FBGraphUser> *me, | |
| NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting /me" error:error]; | |
| return; | |
| } | |
| NSLog(@"My name is %@", me.name); | |
| }]; | |
| } | |
| // #2: Graph API: /me/friends | |
| -(void)requestFriends { | |
| [FBRequestConnection startForMyFriendsWithCompletionHandler:^(FBRequestConnection *connection, id data, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting /me/friends" error:error]; | |
| return; | |
| } | |
| NSArray* friends = (NSArray*)[data data]; | |
| NSLog(@"You have %d friends", [friends count]); | |
| }]; | |
| } | |
| // #3: Graph API: /me/albums && /{albums[0]}/photos | |
| -(void)requestAlbums { | |
| [FBRequestConnection startWithGraphPath:@"/me/albums" | |
| completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting /me/albums" error:error]; | |
| return; | |
| } | |
| NSArray* collection = (NSArray*)[result data]; | |
| NSLog(@"You have %d albums", [collection count]); | |
| NSDictionary* album = [collection objectAtIndex:0]; | |
| NSLog(@"Album ID: %@", [album objectForKey:@"id"]); | |
| // /albums[0]/photos | |
| NSString* photos = [NSString stringWithFormat:@"%@/photos", [album objectForKey:@"id"]]; | |
| [FBRequestConnection startWithGraphPath:photos | |
| completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| NSArray* photos = (NSArray*)[result data]; | |
| NSLog(@"You have %d photo(s) in the album %@", | |
| [photos count], | |
| [album objectForKey:@"name"]); | |
| }]; | |
| }]; | |
| } | |
| // #4: Graph API: /me/groups | |
| -(void)requestGroups { | |
| [FBRequestConnection startWithGraphPath:@"/me/groups" completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting /me/groups" error:error]; | |
| return; | |
| } | |
| NSArray* collection = (NSArray*)[result data]; | |
| NSLog(@"You have %d groups", [collection count]); | |
| }]; | |
| } | |
| // #5: FQL via Graph API "SELECT uid, name, pic_square FROM user WHERE uid = me()" | |
| -(void)requestMeWithFQL { | |
| NSString* meFql = @"SELECT uid, name, pic_square FROM user WHERE uid = me()"; | |
| [FBRequestConnection startWithGraphPath:@"/fql" | |
| parameters:@{ @"q" : meFql } | |
| HTTPMethod:@"GET" | |
| completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting me via FQL" error:error]; | |
| return; | |
| } | |
| if([[result objectForKey:@"data"] count] > 0) { | |
| // {data: [{user1}, {user2}]} | |
| NSLog(@"FQL name: %@", [result objectForKey:@"data"][0][@"name"]); | |
| } else { | |
| NSLog(@"No users found"); | |
| } | |
| }]; | |
| } | |
| // #6: Graph API: batch request for /me, /me/groups, /me/albums | |
| -(void)requestWithBatch { | |
| FBRequestConnection* conn = [[FBRequestConnection alloc] init]; | |
| [conn addRequest:[FBRequest requestForMe] completionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *me, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting /me via batch" error:error]; | |
| return; | |
| } | |
| NSLog(@"Batched: My name is %@", me.name); | |
| }]; | |
| FBRequest* groups = [FBRequest requestForGraphPath:@"/me/groups"]; | |
| [conn addRequest:groups completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting /me/groups via batch" error:error]; | |
| return; | |
| } | |
| if([[result objectForKey:@"data"] count] > 0) { | |
| NSLog(@"You have %d groups", [[result objectForKey:@"data"] count]); | |
| } else { | |
| NSLog(@"No groups returned"); | |
| } | |
| }]; | |
| FBRequest* albums = [[FBRequest alloc] initWithSession:[FBSession activeSession] | |
| graphPath:@"/me/albums" | |
| parameters:@{@"fields": @"name,id"} | |
| HTTPMethod:@"GET"]; | |
| [conn addRequest:albums completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error requesting /me/albums via batch" error:error]; | |
| return; | |
| } | |
| NSArray* collection = (NSArray*)[result data]; | |
| NSLog(@"You have %d albums", [collection count]); | |
| }]; | |
| [conn start]; | |
| } | |
| // #7: Graph API: post a status. | |
| -(void)postStatusAsHelper { | |
| [FBRequestConnection startForPostStatusUpdate:@"Hello World?" completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error posting status using static" error:error]; | |
| return; | |
| } | |
| NSLog(@"Post ID: %@", result[@"id"]); | |
| }]; | |
| } | |
| // #8: Graph API: post an Open Graph action | |
| -(void)postAction { | |
| id<BirdSightingAction> action = (id<BirdSightingAction>)[FBGraphObject graphObject]; | |
| action.bird = @"http://samples.ogp.me/377812905594754"; | |
| FBRequest* newAction = [[FBRequest alloc]initForPostWithSession:[FBSession activeSession] graphPath:@"/me/birdsighting:see" graphObject:action]; | |
| FBRequestConnection* conn = [[FBRequestConnection alloc] init]; | |
| [conn addRequest:newAction completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error posting action" error:error]; | |
| return; | |
| } | |
| NSLog(@"Bird sighting action ID: %@", result[@"id"]); | |
| }]; | |
| [conn start]; | |
| } | |
| // #9: FQL via Graph API | |
| -(void)requestFriendsWithFQL { | |
| NSString* fql = | |
| @"{" | |
| @"'allfriends':'SELECT uid2 FROM friend WHERE uid1=me()'," | |
| @"'frienddetails':'SELECT id, name, url, pic FROM profile WHERE id in (SELECT uid2 FROM #allfriends)'," | |
| @"}"; | |
| [FBRequestConnection startWithGraphPath:@"/fql" | |
| parameters:@{ @"q" : fql} | |
| HTTPMethod:@"GET" | |
| completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { | |
| if(error) { | |
| [self printError:@"Error reading friends via FQL" error:error]; | |
| return; | |
| } | |
| NSMutableArray* friends = [[NSMutableArray alloc]init]; | |
| NSArray* friendIds = ((NSArray*)[result data])[0][@"fql_result_set"]; | |
| NSArray* friendInfo = ((NSArray*)[result data])[1][@"fql_result_set"]; | |
| for(int i = 0; i < [friendIds count]; i++) { | |
| NSDictionary* friend = [[NSDictionary alloc]initWithObjectsAndKeys: | |
| [[friendInfo objectAtIndex:i] objectForKey:@"id"], @"id", | |
| [[friendInfo objectAtIndex:i] objectForKey:@"name"], @"name", | |
| [[friendInfo objectAtIndex:i] objectForKey:@"pic"], @"pic", | |
| [[friendInfo objectAtIndex:i] objectForKey:@"url"], @"url", nil]; | |
| [friends addObject:friend]; | |
| } | |
| int count = [friends count]; | |
| NSLog(@"You have %d friends", count); | |
| for(int i = 0; i < [friends count]; i++) { | |
| NSLog(@"Name: %@", [[friends objectAtIndex:i] objectForKey:@"name"]); | |
| } | |
| }]; | |
| } | |
| // #10: Shared error handler | |
| -(void)printError:(NSString*)message error:(NSError*)error { | |
| if(message) { | |
| NSLog(@"%@", message); | |
| } | |
| // works for 1 FBRequest per FBRequestConnection | |
| int userInfoCode = [error.userInfo[@"com.facebook.FBiOSSDK:ParsedJSONResponseKey"][0][@"body"][@"error"][@"code"] integerValue]; | |
| NSString* userInfoMessage = error.userInfo[@"com.facebook.FBiOSSDK:ParsedJSONResponseKey"][0][@"body"][@"error"][@"message"]; | |
| // works for batches of > 1 FBRequest per FBRequestConnection | |
| // int userInfoCode = [error.userInfo[@"com.facebook.FBiOSSDK:ParsedJSONResponseKey"][@"body"][@"error"][@"code"] integerValue]; | |
| // NSString* userInfoMessage = error.userInfo[@"com.facebook.FBiOSSDK:ParsedJSONResponseKey"][@"body"][@"error"][@"message"]; | |
| // outer error | |
| NSLog(@"Error: %@", error); | |
| NSLog(@"Error code: %d", error.code); | |
| NSLog(@"Error message: %@", error.localizedDescription); | |
| // inner error | |
| NSLog(@"Error code: %d", userInfoCode); | |
| NSLog(@"Error message: %@", userInfoMessage); | |
| if(userInfoCode == 2500) { | |
| UIAlertView* view = [[UIAlertView alloc]initWithTitle:@"Facebook" | |
| message:@"You're not logged in." | |
| delegate:nil | |
| cancelButtonTitle:@"OK" | |
| otherButtonTitles:nil]; | |
| dispatch_async(dispatch_get_main_queue(), ^{ | |
| [view show]; | |
| }); | |
| } | |
| } |
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