iOS/objective C: Display JSON feed in table - ios

Question

I am trying to display a JSON feed in a tableview. While there are many tutorials and questions on SO about json, none seem to address this question (without suggesting complex frameworks).
So far, I have been able to get the JSON feed into an array. I know how to display a table once you have an object as the datasource. However, I am missing the code to convert the feed into an object suitable for display in the table.
Code so far:
- (void)viewDidLoad
{
[super viewDidLoad];
//get JSON feed
dispatch_async(kBgQueue, ^{
NSData* data = [NSData dataWithContentsOfURL: kLatestKivaLoansURL];
[self performSelectorOnMainThread:#selector(fetchedData:) withObject:data waitUntilDone:YES];
});
}
//convert to array
- (void)fetchedData:(NSData *)responseData {
NSError* error;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseData
NSLog(#"about to print json: %#",json);
NSArray* latestLoans = [json objectForKey:#"loans"];
}
//Code to convert FEED INTO OBJECT IS NOT WORKING: I have...
- (NSArray*) convertFeedtoObject:(NSArray*)feed {
loanObject *loan = nil;
NSMutableArray * loans = [NSMutableArray array];
NSInteger loansCount = 10;
int i;
for (i = 0; i < loansCount; i++) {
[loans addObject: loan]
}
}
//In the tableview delegate method:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//This sets datasource:
//getloans method does not exist
Loans *loan = [self.getLoans objectAtIndexPath:indexPath];
//This sets place in storyboard VC
IDTVCell *cell = [self.tableView dequeueReusableCellWithIdentifier:#"Cell"];
cell.loan = loan;
if (cell == nil) {
cell = [[IDTVCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:#"Cell"];
}
NSString * loanTitle = loan.loan;
cell.Name = loanTitle;
return cell;
}
Would appreciate any suggestions on how to get this working.

Answer 1

Well after fetching data you need to call
[self.tableView reloadData] and please write down the other delegate and datasource methods of tableview tableViewNumberOfRows is needed for this to work, and do set the tableview datasource and delegate to self.
EDIT
This should be your code
- (void)viewDidLoad
{
[super viewDidLoad];
dispatch_async(kBgQueue, ^{
NSData* data = [NSData dataWithContentsOfURL: kLatestKivaLoansURL];
[self performSelectorOnMainThread:#selector(fetchedData:) withObject:data waitUntilDone:YES];
});
}
- (void)fetchedData:(NSData *)responseData {
NSError* error;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseData
NSLog(#"about to print json: %#",json);
NSArray* latestLoans = [json objectForKey:#"loans"];
[self.getLoans removeAllObjects];
self.getLoans = [self convertFeedtoObject:latestLoans]; //add this line
}
- (NSArray*) convertFeedtoObject:(NSArray*)feed {
loanObject *loan = nil;
NSMutableArray * loans = [NSMutableArray array];
NSInteger loansCount = 10;
int i;
for (i = 0; i < loansCount; i++) {
[loans addObject: loan]
}
[self.tableview reloadData]; //add this line
}
//add this method
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.getLoans count];
}