Question

I have a uitableview ‘A’ which has cells, on clicking one of the cell, it needs to push another table view ‘B’. and now when a cell is clicked in ‘B’, its needs to open a simple view.

I have managed to display both the tables in two different views. but when a cell is clicked in the menu B. it hangs and shows the below message

> unrecognized selector sent to > instance

could someone please tell me how do i solve this.thanks

Please find below my code

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    NSInteger row = [indexPath row];
    NSLog(@"entering the if loop libdecripviewcontoller");
    if(self.libraryDescripViewController == nil){
        NSLog(@"its creating new instance of libdecripviewcontoller");
        LibraryDescripViewController *aLib = [[LibraryDescripViewController alloc] initWithNibName:@"LibraryDescripView" bundle:nil];
        self.libraryDescripViewController = aLib;
        [aLib release];
    }
    libraryDescripViewController.title = [NSString stringWithFormat:@"%@",[libraryMenu objectAtIndex:row]];

    ULS1AppDelegate *delegate = [[UIApplication sharedApplication] delegate ];
    [delegate.searchLibNavController pushViewController:libraryDescripViewController animated:YES];
    }

Please find the output below

2010-06-27 20:13:15.521 ULS1[1020:207]
entering the if loop
libdecripviewcontoller 2010-06-27
20:13:15.533 ULS1[1020:207] its
creating new instance of
libdecripviewcontoller 2010-06-27
20:13:15.541 ULS1[1020:207] *
-[LibraryMenuTabViewController setLibraryDescripViewController:]:
unrecognized selector sent to instance
0x3c2ec70 2010-06-27 20:13:15.554
ULS1[1020:207] * Terminating app due
to uncaught exception
‘NSInvalidArgumentException’, reason:
‘*** -[LibraryMenuTabViewController
setLibraryDescripViewController:]:
unrecognized selector sent to instance
0x3c2ec70’ 2010-06-27 20:13:15.558
ULS1[1020:207] Stack: ( 29303899,
2512004361, 29685819, 29255286,
29107906, 14755, 3050054, 3033220,
287146, 29088448, 29084744, 37393941,
37394138, 2777007, 11184, 11038 )

Answer 1

It seems that you are calling “self.libraryDescripViewController = aLib” which is another way of writing [self setLibraryDescripViewController:alib].

The most likely cause of this would be in that you haven’t declared the method setLibraryDescripViewController in your class.

Hope this helps.