createIndexOfSponsorsInOrganizations

SponsorTableVC.m

// this method creates an index of the sponsors within organizations
- (void)createIndexOfSponsorsInOrganizations {
    // sort first
    [self createdSortedArrayOfSponsors];
    // prepare new mutable array
    NSMutableArray *sponsors    = [[NSMutableArray alloc] init];
    for (int i = 0; (i < [self.sortedArray count]); i++) {
        // check each org and add those with organizationSposorLevel > 0
        int sponsorLevel = [self.sortedArray[i] organizationSponsorLevel];
        // add
        if (sponsorLevel > 0) {
            // ok to add
            NSNumber *orgIndex = [self.sortedArray[i] organizationId];
            [sponsors addObject:orgIndex];
        }
    }
    self.sponsorIndex = [sponsors copy];
    // NSLog(@"index array count: %lu", [self.sponsorIndex count]);
}

// optional method - create array sorted by name
- (void)createdSortedArrayOfSponsors {
    // sort in ascending order
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"organizationName" ascending:YES];
    NSArray *descriptors = [NSArray arrayWithObject:sortDescriptor];
    self.sortedArray = [SharedConferenceObject.organizationsArray sortedArrayUsingDescriptors:descriptors];
}