macOS Something wrong in my NSTableView?

[Simplicated]

Hi, for some reason it seems my NSTableView is not really working. It crashes the app and gives the following messages in Console

2009-01-10 17:26:05.017 MyApp[28858:10b] *** -[NSCFArray rowIndex]: unrecognized selector sent to instance 0x10803b0
2009-01-10 17:26:05.018 MyApp[28858:10b] *** -[NSCFArray rowIndex]: unrecognized selector sent to instance 0x10803b0
2009-01-10 17:26:06.856 MyApp[28858:10b] *** -[NSCFArray rowIndex]: unrecognized selector sent to instance 0x10803b0
2009-01-10 17:26:06.859 MyApp[28858:10b] *** -[NSCFArray rowIndex]: unrecognized selector sent to instance 0x10803b0

Part of the code:

-(int)numberOfRowsInTableView:(NSTableView *)aTable {
	return [candidates count];
}

-(id)tableView:(NSTableView *)aTableView
objectValueForTableColumn:(NSTableColumn *)tableColumn
row:(int)rowIndex; {
	return [candidates rowIndex];
}

Where candidates is a "global" NSArray.

Please help me. Thank you.

 

[Me1000]

try this rewriting the method similar to this.

- (id)tableView:(NSTableView *)tv 
objectValueForTableColumn:(NSTableColumn *)tableColumn 
			row:(int)row 
{ 
    NSString *v = [candidate objectAtIndex:row]; 
    return v; 
}