Second view in UITableView will not display parsed data from JSON - iphone

Question

I have a parsed data from JSON file. It works like a charm in the first view of my UITableView. However, it displays a blank second view when I tap on an item.
MasterView.h
#interface MasterViewController : UITableViewController
{
NSArray *json;
}
#property (nonatomic, retain) NSArray *json;
#end
MasterView.m
#import "MasterViewController.h"
#import "InformationViewController.h"
#interface MasterViewController ()
#end
#implementation MasterViewController
#synthesize json;
- (void)viewDidLoad
{
[super viewDidLoad];
NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:#"http://j4hm.t15.org/ios/console.php"]];
[self performSelectorOnMainThread: #selector(fetchedData:) withObject: jsonData waitUntilDone: YES];
}
- (void)fetchedData:(NSData *)responseData
{
NSError *error;
self.json = [NSJSONSerialization JSONObjectWithData: responseData options: kNilOptions error: &error];
NSLog(#"String is %#", self.json);
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [json count];
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
cell.textLabel.text = [[json objectAtIndex: indexPath.row] objectForKey: #"Console"];
[cell setAccessoryType: UITableViewCellAccessoryDisclosureIndicator];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
InformationViewController *informationViewController = [[InformationViewController alloc] initWithStyle:UITableViewStylePlain];
informationViewController.title = [[json objectAtIndex: indexPath.row] objectForKey: #"Console"];
informationViewController.Information = [[json objectAtIndex: indexPath.row] objectForKey: #"Model"];
NSLog(#"String is %#", informationViewController.Information);
[self.navigationController pushViewController: informationViewController animated:YES];
}
InformationView.h
#interface InformationViewController : UITableViewController
#property (nonatomic, strong) NSArray * Information;
#end
InformationView.m
#interface InformationViewController ()
#end
#implementation InformationViewController
#synthesize Information;
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
cell.textLabel.text = [[Information objectAtIndex: indexPath.row] objectForKey: #"Model"];
[cell setAccessoryType: UITableViewCellAccessoryDisclosureIndicator];
return cell;
}

Answer 1

Here i Posted Another Answer Just Because i don't want to Generate Confusion.
The Project Code : http://www.cogzentappz.com/demo/iostutorial/TestJson.zip
instead of passing the Selected Value, Pass the Whole Array through NSUsedDefaults And Retrive them Using Following Code.
- (void)fetchedData:(NSData *)responseData
{
NSError *error;
self.json = [NSJSONSerialization JSONObjectWithData: responseData options: kNilOptions error: &error];
NSLog(#"String is %#", self.json);
NSUserDefaults *standardDefaults = [NSUserDefaults standardUserDefaults];
NSMutableArray *arrayObj = [[NSMutableArray alloc] init];
for(int i = 0 ; i<[self.json count] ; i++) {
[arrayObj addObject:[json objectAtIndex:i]]];
}
[standardDefaults setObject:arrayObj forKey:#"longArray"];
[arrayObj release];
}
In the Next View you can Retrive the data Using the Below method.
in ViewDidLoad of informationViewcontroller use This
//reading
NSUserDefaults *standardDefaults = [NSUserDefaults standardUserDefaults];
NSArray *arrayObj = [standardDefaults objectForKey:#"longArray"];
for(int i = 0 ; i<[arrayObj count] ; i++) {
NSLog(#"String is %#",[arrayObj objectAtIndex:i]);
}
As per Your Link The Json Output is like Below :
NSArray-->NSDictionary-->NSArray-->NSDictionary-->NSArray-->NSDictionary
Go to the link : http://json.bloople.net and Post all your json output and Hit enter.
So you have to get the values According to that format.
for(int i = 0 ; i<[self.json count] ; i++) {
NSArray *info_Array=[[self.json objectAtIndex:i ]valueForKey:#"Information"];
NSLog(#"info_Array is %#", info_Array);
for(int j = 0 ; j<[info_Array count] ; j++)
{
NSLog(#"Model is %#", [[info_Array objectAtIndex:j ]valueForKey:#"Model"]);
NSArray *title_Array=[[info_Array objectAtIndex:j ]valueForKey:#"Title"];
for(int k = 0 ; k<[title_Array count] ; k++)
{
NSLog(#"Game is %#", [[title_Array objectAtIndex:k ]valueForKey:#"Game"]);
NSLog(#"Publisher is %#", [[title_Array objectAtIndex:k ]valueForKey:#"Publisher"]);
}
}
NSString *Console_string= [[dataArray objectAtIndex:i ]valueForKey:#"Console"];
NSLog(#"String is %#", Console_string);
}
NSString *Console_string= [[self.Json objectAtIndex:i ]valueForKey:#"Console"];
NSLog(#"String is %#", Console_string);
}

Answer 2

I think you have to reloadData after you fetch your data. Right now, you specify that the NSArrray *json is empty, since the count returns 0. Thus, you prohibit the table view from being filled. Call [tableView reloadData]; after you fetch your data.

Answer 3

Change your code of MaterView.m with this
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
InformationViewController *informationViewController = [[InformationViewController alloc] initWithStyle:UITableViewStylePlain];
informationViewController.title = [[json objectAtIndex: indexPath.row] objectForKey: #"Console"];
informationViewController.Information = [[json objectAtIndex: indexPath.row] objectForKey: #"Model"];
NSLog(#"String is %#", informationViewController.Information);
[self.navigationController pushViewController: informationViewController animated:YES];
}
Hope it helps you...