[IOS programming] How To Get facebook notifications on iOS

Two header files, Social. h and Accounts. h, are to be referenced.

Read account information from the facebook program installed on the iPhone to access facebook and obtain the content.

- (id)init{    self = [super init];    if (self) {        self.isRequesting = NO;        self.accountStore = [[ACAccountStore alloc] init];        ACAccountType *facebookTypeAccount = [self.accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];                NSMutableDictionary *optionsDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"376722425766807",ACFacebookAppIdKey, @[@"email"], ACFacebookPermissionsKey,nil];        、        [self.accountStore requestAccessToAccountsWithType:facebookTypeAccount                                                   options:optionsDict                                                completion:^(BOOL granted, NSError *error)        {                        if (granted) {                [optionsDict setObject:@[@"manage_notifications"/*,@"read_mailbox"*/] forKey:ACFacebookPermissionsKey];                                [self.accountStore requestAccessToAccountsWithType:facebookTypeAccount                                                           options:optionsDict                                                        completion:^(BOOL granted, NSError *error)                {                                        if (granted) {                        self.isConnect = YES;                        NSArray *accounts = [self.accountStore accountsWithAccountType:facebookTypeAccount];                        self.account = [accounts lastObject];                    } else {                        NSLog(@"Facebook Error:%@", [error localizedDescription]);                        self.isConnect = NO;                        facebookCount = @"x";                    }                                    }];                            } else {                //fail                NSLog(@"Facebook Error:%@", [error localizedDescription]);                self.isConnect = NO;                facebookCount = @"x";            }         }];    }    return self;}

When you see the second requestAccessToAccountsWithType, you will be confused. Why don't you read manage_configurations and emails at one time? I also tried this method here, but it always fails. Then I refer to the example above in stackoverflow. They access master permissions such as EMail first, and then access sub-permissions. It turns out that this is correct.

The next step is how to read the number of notifications:

- (void)requestForNotifcation{    if (self.account == nil || self.isRequesting) {        return;    }    self.isRequesting = YES;    NSString *urlStr = @"https://graph.facebook.com/fql";    NSURL *requestUrl = [NSURL URLWithString:urlStr];    NSDictionary *fql = [NSDictionary dictionaryWithObject:@"SELECT title_text FROM notification WHERE recipient_id=me() AND is_unread =1" forKey:@"q"];        //Token:read_mailbox    //SELECT unread_count FROM mailbox_folder WHERE folder_id=0        SLRequest *request = [SLRequest requestForServiceType:SLServiceTypeFacebook                                            requestMethod:SLRequestMethodGET                                                      URL:requestUrl                                               parameters:fql];    request.account = self.account;    [request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {        //process        //NSLog(@"%@", [[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding]);        self.isRequesting = NO;        if (responseData != nil) {            if (urlResponse.statusCode >= 200 && urlResponse.statusCode < 300) {                id json = [NSJSONSerialization JSONObjectWithData:responseData                                                          options:NSJSONReadingAllowFragments                                                            error:nil];                                if (json != nil) {                    NSDictionary *mainDict = json;                    NSDictionary *unreadNotifications = [mainDict objectForKey:@"data"];                    NSInteger count = [unreadNotifications count];                    if ([self.delegate respondsToSelector:@selector(didGetNotificationCount:)]) {                        [self.delegate didGetNotificationCount:count];                    }                }            }        } else {            facebookCount = @"x";        }    }];}

The SQL-like language here is a method provided by facebook webAPI, called fql. It is similar to SQL usage. For details, refer to the facebook developer website, there are a variety of fql details, you can get friends and other things.

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