If JSON response is "true", don't show results in Table View - ios

Question

I'm getting this JSON:
{
"timestamp": "2013-05-03T22:03:45Z",
"resultsOffset": 0,
"status": "success",
"resultsLimit": 10,
"breakingNews": [],
"resultsCount": 341,
"feed": [{
"headline": "This is the first headline",
"lastModified": "2013-05-03T21:33:32Z",
"premium": false,
"links": {
"api": {
And use this to load it in a UITableView:
#property (strong, nonatomic) NSArray *headlinesArray;
- (void)viewDidLoad
{
[[RKObjectManager sharedManager] loadObjectsAtResourcePath:[NSString stringWithFormat:#"/now/?leafs=%#&teas=%#&apikey=xxxxx", leafAbbreviation, teaID] usingBlock:^(RKObjectLoader *loader) {
loader.onDidLoadObjects = ^(NSArray *objects){
premiumArray = objects;
[_tableView reloadData];
};
[loader.mappingProvider setMapping:[Feed mapping] forKeyPath:#"feed"];
loader.onDidLoadResponse = ^(RKResponse *response){
//NSLog(#"BodyAsString: %#", [response bodyAsString]);
};
}];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"standardCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
Feed *feedLocal = [headlinesArray objectAtIndex:indexPath.row];
NSString *headlineText = [NSString stringWithFormat:#"%#", feedLocal.headline];
cell.textLabel.text = headlineText;
return cell;
}
Headline class model:
#property (strong, nonatomic) NSString *headline;
#property (strong, nonatomic) Links *linksHeadline;
Is there any way to check if premium is true in the JSON, to not show the headline in the UITableView?
EDIT 1
I added #property (strong, nonatomic) NSArray *premiumArray; which is pulling in the correct data associated with premium, so now I just need help looking thru that array for links that say TRUE so my UITableView won't show any headlines that premium = TRUE.
EDIT 2
I posted the viewDidLoad code above.
EDIT 3
Feed.h
#property (nonatomic, strong) NSString *headline;
#property (nonatomic, strong) NSString *premium;
Feed.m
+ (RKObjectMapping *)mapping {
RKObjectMapping *objectMapping = [RKObjectMapping mappingForClass:[self class] usingBlock:^(RKObjectMapping *mapping) {
[mapping mapKeyPathsToAttributes:
#"headline", #"headline",
#"premium", #"premium",
nil];
}];
return objectMapping;
}
EDIT
I added this per some answers, but still couldn't get it working, any thoughts?
#property (strong, nonatomic) NSArray *premiumArray;
#property (strong, nonatomic) NSMutableArray *myMutable;
[[RKObjectManager sharedManager] loadObjectsAtResourcePath:[NSString stringWithFormat:#"/now/?leagues=%#&teams=%#&apikey=5qqpgrsnfy65vjzswgjfkgwy", leagueAbbreviation, teamID] usingBlock:^(RKObjectLoader *loader) {
loader.onDidLoadObjects = ^(NSArray *objects){
//sports = objects;
premiumArray = objects;
[_tableView reloadData];
};
[loader.mappingProvider setMapping:[Feed mapping] forKeyPath:#"feed"];
loader.onDidLoadResponse = ^(RKResponse *response){
//NSLog(#"BodyAsString: %#", [response bodyAsString]);
};
}];
self.myMutable = [[premiumArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"premium = YES"]] mutableCopy];

Answer 1

You will need to create some sort of UITableView data source. Having the UITableView handle this is much more difficult than simply setting up a data structure and then pass that data in to the UITableView data source.
A NSMutableArray would work just fine for what you need done. Whatever JSON parser toolkit you are using, you are likely given an arrayed response, which looks like is stored in headlinesArray, each containing the example code above.
You simply need to enumerate through headlinesArray and IF the [post objectForKey:#"premium"] == TRUE then add it to the NSMutableArray.
Place all of this in the viewDidLoad so that it is processed before the UITableView is built and then in the TableView you simply need to access that newly built array.
.h
#interface YourClass: YourClassSuperclass
{
NSMutableArray *a;
}
.m
//In ViewDidLoad
a = [NSMutableArray array]; //Allocs and Inits a new array.
for (Feed *f in headlinesArray) //For all feeds in the headlines array. (f is the local var)
{
//check if premium == TRUE. If yes, add to a.
}
//Then in your data source methods you just use the array named 'a'
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"standardCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
Feed *feedLocal = [a objectAtIndex:indexPath.row]; //Replaced headlinesArray with a
NSString *headlineText = [NSString stringWithFormat:#"%#", feedLocal.headline];
cell.textLabel.text = headlineText;
return cell;
}

Answer 2

In your table view data source, you will want an NSMutableArray. When you get the data, use this:
NSArray *someFeedArray = ...;
self.mutableArray = [[NSMutableArray alloc] init];
for (NSDictionary *dict in someFeedArray)
{
BOOL isPremium = [[[(NSArray *)dict[#"feed"] objectAtIndex:0] objectForKey:"premium"] boolValue] isEqualToString:#"true"]; //Assuming stored as string
if (!isPremium) [self.mutableArray addObject:dict];
}
In your numberOfRowsInSection method, you should do this:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.mutableArray.count;
}
And you're done.