Question

I have retrieved data from Json URL and displayed it in a table view. I have also inlcuced a button in table view. On clicking the button the data must be transferred to a another table view. The problem is that i could send the data to a view and could display it on a label. But i couldnt bind the dat to table view … Here’s some of the code snippets…

Buy Button…

-(IBAction)Buybutton{
    Product *selectedProduct = [[data products]objectAtIndex:0];    
    CartViewController *cartviewcontroller = [[[CartViewController alloc] initWithNibName:@"CartViewController" bundle:nil]autorelease];    
    cartviewcontroller.product= selectedProduct;
    [self.view addSubview:cartviewcontroller.view]; 
}

CartView…

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad 
{
    [super viewDidLoad];    
    data = [GlobalData SharedData]; 
    NSMutableArray *prod =[[NSMutableArray alloc]init];     
    prod = [data products]; 
    for(NSDictionary *product in prod){
        Cart *myprod = [[Cart alloc]init];
        myprod.Description = [product Description];

        myprod.ProductImage =[product ProductImage];
        myprod.ProductName = [product ProductName];
        myprod.SalePrice = [product SalePrice];

        [data.carts addObject:myprod];
        [myprod release];
    }
    Cart *cart = [[data carts]objectAtIndex:0];
    NSString *productname=[cart ProductName];
    self.label.text =productname;

    NSLog(@"carts");
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
   return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [data.carts count];
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath  {
    return 75;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NSLog(@"cellforrow");
    static NSString *CellIdentifier = @"Cell";

    ProductCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if(cell ==nil)
    {
        cell = [[[ProductCell alloc]initWithFrame:CGRectZero reuseIdentifier:CellIdentifier]autorelease];
    }
    NSUInteger row = [indexPath row];
    Cart *cart = [[data carts]objectAtIndex:row];
    cell.productNameLabel.text = [cart ProductName];

    return cell;    
}

I am also getting the following error in the console

2010-06-11 18:34:29.169 navigation[4109:207] *** -[CartViewController tableView:numberOfRowsInSection:]: message sent to deallocated instance 0xcb4d4f90

Answer 1

Your view controller is autoreleased that’s why you have the error in the console.

CartViewController *cartviewcontroller =
    [[[CartViewController alloc] 
            initWithNibName:@"CartViewController" 
            bundle:nil] ***autorelease***];

You should store your view controller in a member variable.