How to fill UITableView with ASIHttpRequest JSON data? - objective-c

Question

i'm trying to fill my UITableView with this JSON data using the ASIhttprequest, but ik get the following exception: __NSArrayM objectForKey:]: unrecognized selector sent to instance
I use the following code in my controller to achieve this:
#import <UIKit/UIKit.h>
#interface tableListViewController : UITableViewController {
NSDictionary *data;
}
#end
And the main file:
#import "tableListViewController.h"
#import "ASIHTTPRequest.h"
#import "ASIFormDataRequest.h"
#interface tableListViewController ()
#end
#implementation tableListViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSURL *url = [NSURL URLWithString:#"http://api.glennzo.nl/glow/index.json"];
ASIHTTPRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setTag:100];
[request setDelegate:self];
[request startSynchronous];
//Set the title
self.navigationItem.title = #"Events";
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (void) requestFinished:(ASIHTTPRequest *) request
{
if (request.tag == 100) {
NSData *responseData = [request responseData];
NSError *error;
NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&error];
if(!JSON || ![JSON count])
{
NSLog(#"%#", #"geen correcte json data van request gekregen");
}
else
{
data = JSON;
}
}
}
- (void) requestFailed:(ASIHTTPRequest *) request
{
NSError *error = [request error];
NSLog(#"Error: %#",error.localizedDescription);
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [data count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil)
{
cell = [UITableViewCell alloc];
}
NSArray *namen = [data objectForKey:#"name"];
cell.textLabel.text = [namen objectAtIndex:indexPath.row];
return cell;
}
Thanks to some debugging i now know that the ASIHttpRequest works, but the NSdictionary that i create (and intent to use around the entire app) gives me the trouble. Can somebody set me in the right direction?

Answer 1

The error seems to be at:
NSArray *namen = [data objectForKey:#"name"];
So I think data type isn't correct (NSDictionary), is nil or it is filled with another type:
[NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&error];
Try seeing what arrives to you via JSON. For example:
NSError *jsonError = nil;
id jsonObject = [NSJSONSerialization JSONObjectWithData:jsonData options:kNilOptions error:&jsonError];
if ([jsonObject isKindOfClass:[NSArray class]]) {
NSLog(#"its an array!");
NSArray *jsonArray = (NSArray *)jsonObject;
NSLog(#"jsonArray - %#",jsonArray);
} else {
NSLog(#"its probably a dictionary");
NSDictionary *jsonDictionary = (NSDictionary *)jsonObject;
NSLog(#"jsonDictionary - %#",jsonDictionary);
}