if your sizeOfFile: method is returning an integer, then you should convert it to NSNumber
like:
object = [NSNumber numberWithInt:[[files objectAtIndex:rowIndex] sizeOfFile]];

hth,
Chaitanya

On 25-Sep-08, at 5:22 PM, Tilo Villwock wrote:

i have the following piece of code in my controller class:

- (id)tableView:(NSTableView *)aTableView objectValueForTableColumn: (NSTableColumn *)aTableColumn row:(int)rowIndex{
        id object = nil;
        if([tableView columnWithIdentifier:[aTableColumn identifier]] == 1){
                object = [[files objectAtIndex:rowIndex] name];
        }
        if([tableView columnWithIdentifier:[aTableColumn identifier]] == 2){
                object = (id)[[files objectAtIndex:rowIndex] sizeOfFile];
        }
        return object;
}

it provides the NSTableView in my app with content. For some reason i cannot assign:

                object = (id)[[files objectAtIndex:rowIndex] sizeOfFile];

or at least an error occurs i cannot figure out. In the debugger the last item on top of the stack is something like "objc_msgSend_ptr". Now "files" here is an instance of NSMutableArray and the method "sizeOfFile" belongs to a custom class and returns the size properly.

I'm pretty new to Cocoa and Objective-C and being used to java, i'm not quite familiar with memory management (alloc/release/retain etc.). Maybe there is something i'm missing here. I'm running 10.4 Tiger.

Thanks in advance.

Tilo
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