Getting started with NSTableView

[Benjamin Dobson]

Hi all,

I'm trying to use an NSTableView for the first time. I've got a four- 
column table view set up in IB, and class files for the dataSource as  
follows:

.h:
@interface ShowResults : NSObject {
        IBOutlet id theTable;
        
        @private
        NSMutableArray *finalData;
        NSMutableArray *currentData;
}

- (IBAction)fetchResults:(id)sender;
- (id)tableView:(NSTableView *)aTableView objectValueForTableColumn: 
(NSTableColumn *)aTableColumn	row:(int)rowIndex;
- (void)tableView:(NSTableView *)aTableView setObjectValue:anObject  
forTableColumn:(NSTableColumn *)aTableColumn row:(int)rowIndex;
- (int)numberOfRowsInTableView:(NSTableView *)aTableView;

@end

.m:
@implementation FetchHighscores

- (IBAction)fetchResults:(id)sender
{
	finalData = [NSMutableArray arrayWithCapacity:4]; // To prevent it  
being (null)
	NSString *string = @"1,1,1 2,2,2 3,3,3 4,5,6 7,3,4" // etc. Loaded  
from an external source.
        NSArray *components = [results componentsSeparatedByString:@"\n"];
	NSArray *template = [NSArray arrayWithObjects:@"Col1", @"Col2",  
@"Col3", @"Col4", nil];
        int loops = [components count];
        int loop;
        for (loop = 0; loop < loops; loop++)
        {
                currentData = [NSMutableArray arrayWithCapacity:4];
                [currentData addObject:@"0"];
		[currentData addObjectsFromArray:[[scores objectAtIndex:loop]  
componentsSeparatedByString:@","]];
		while ([currentData count] < 4) // External source isn't entirely  
consistent. This is just a placeholder.
                {
                        [currentData addObject:@"0"];
                }
		NSDictionary *dict = [NSDictionary dictionaryWithObjects:currentData  
forKeys:template];
                [finalScores insertObject:dict atIndex:loop];
        }
        [theTable reloadData];
}


// Code below is modified from Apple's website.
- (id)tableView:(NSTableView *)aTableView
objectValueForTableColumn:(NSTableColumn *)aTableColumn
                        row:(int)rowIndex
{
        id theRecord, theValue;
        
    NSParameterAssert(rowIndex >= 0 && rowIndex < [finalData count]);
    theRecord = [finalData objectAtIndex:rowIndex]; // Error
    theValue = [theRecord objectForKey:[aTableColumn identifier]]; //  
Error
    return theValue;
}

- (void)tableView:(NSTableView *)aTableView
   setObjectValue:anObject
   forTableColumn:(NSTableColumn *)aTableColumn
                          row:(int)rowIndex
{
    id theRecord;
        
    NSParameterAssert(rowIndex >= 0 && rowIndex < [finalData count]);
    theRecord = [finalData objectAtIndex:rowIndex];
    [theRecord setObject:anObject forKey:[aTableColumn identifier]];
    return;
}

- (int)numberOfRowsInTableView:(NSTableView *)aTableView
{
        return [finalData count];
}

@end

I'm getting strange errors. In the console, I get:
*** -[NSRectSet objectAtIndex:]: unrecognized selector sent to  
instance 0x1516c220

But sometimes I get a different error: the NSParameterAssert isn't  
satisfied.

What needs changing?

Thanks.
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