Error:Incompatible Pointer (data not passing to another viewcontroller)

Question

i want to pass a data to anotherViewController from TableView.But i don't know how to pass the data.here is my code.

    -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
     PeripheralManager    * objSelectedDevice=[device objectAtIndex:indexPath.row];

   // [self prepareForSegue:@"TableDetails" sender:objSelectedDevice];
   // detailViewObject.objCurrentDevice=objSelectedDevice;
}

-(void) prepareForSegue:(UIStoryboardSegue *)segue selectedDevice:(PeripheralManager *)pobjSelectedDevice sender:(id)sender
{


    if ([segue.identifier isEqualToString:@"TableDetails"]) {

        MeBleDetailViewController *detailViewObject=segue.destinationViewController;


        detailViewObject.dataArray=device;

        detailViewObject.title=@"Supported Services";

        detailViewObject.objCurrentDevice=pobjSelectedDevice;
    }
}

score 3 · Accepted Answer · answered Oct 27 '12 at 12:00

3

You need to make an instance variable, set it before making the call to performSegueWithIdentifier:, and grab its value in prepareForSegue:, like this:

In the header:

@interface MyViewController {
    //... your ivars ...
    PeripheralManager *selectedManager;
}
//... more stuff ...
@end

In the implementation:

-(void)tableView:(UITableView *)tableView
    didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // set your ivar
    selectedManager = [device objectAtIndex:indexPath.row];
    [self performSegueWithIdentifier:@"TableDetails" sender:self];
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"TableDetails"]) {

        MeBleDetailViewController *detailViewObject=segue.destinationViewController;

        detailViewObject.dataArray=device;

        detailViewObject.title=@"Supported Services";

        // read your ivar
        detailViewObject.objCurrentDevice=selectedManager;
    }
}

answered Oct 27 '12 at 12:00

Sergey Kalinichenko

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shows 3 warnings 1)nested push animation... 2)finishing up a navigation....3)unbalanced call... – prem Oct 27 '12 at 12:16
@prem I suspect that the errors are coming from some other places. – Sergey Kalinichenko Oct 27 '12 at 12:21
http://pastebin.com/83DD02ku check this link this is my code – prem Oct 27 '12 at 12:25
@prem Ah, I think I know what's going on: you have that same segue called in the storyboard, right? In this case, remove this line: `[self performSegueWithIdentifier:@"TableDetails" sender:self];`, it is redundant, and it causes the unbalanced warning. – Sergey Kalinichenko Oct 27 '12 at 12:37
yup i remove already but table view data not displayed in nextview controller – prem Oct 27 '12 at 12:45
@prem Add `NSLog` calls in the `didSelectRowAtIndexPath:` and `prepareForSegue`, and see if they are called in the right sequence. – Sergey Kalinichenko Oct 27 '12 at 13:05
ok i will add and inform to you – prem Oct 27 '12 at 15:48

score 2 · Answer 2 · answered Oct 27 '12 at 11:50

2

You don't call prepareForSegue: in your code; call performSegueWithIdentifier: instead and you will have prepareForSegue: called for you.

answered Oct 27 '12 at 11:50

Phillip Mills

30,888
4
42
57

thanks warning cleared but data not displayed in next ViewController shows 'null' – prem Oct 27 '12 at 11:57
Now two data loading to the viewcontroller(unbalanced) – prem Oct 27 '12 at 12:00
Sorry but I don't understand what "two data" means. – Phillip Mills Oct 27 '12 at 12:05
shows 3 warnings 1)nested push animation... 2)finishing up a navigation....3)unbalanced call... – prem Oct 27 '12 at 12:18

Error:Incompatible Pointer (data not passing to another viewcontroller)

2 Answers2