Re: NSTableView - populating from C procedure
Re: NSTableView - populating from C procedure
- Subject: Re: NSTableView - populating from C procedure
- From: KK <email@hidden>
- Date: Thu, 23 Jul 2009 14:52:43 +0900
Assuming your cstring is null-terminated, you can use [NSString
stringWithUTF8String]
On Thu, Jul 23, 2009 at 2:41 PM, Alexander Bokovikov
<email@hidden>wrote:
> Hi, All,
>
> This is my first attempt to deal with Cocoa container class, so I have some
> unclear points. I've found one of many tutorials here:
>
> http://www.cocoadev.com/index.pl?NSTableViewDataSource
>
> where it is said, among other, that NSTableView items may be filled out
> like this:
>
> - (id)tableView:(NSTableView *)aTableView
> objectValueForTableColumn:(NSTableColumn *)aTableColumn
> row:(int)rowIndex {
>
> return [[myTableViewArray objectAtIndex: rowIndex]
> objectForKey:[aTableColumn identifier]]
>
> }
>
> My specifics is that the data (strings) are delivered by an external
> procedure, located out of ObjC stuff, and returning C-style strings. My
> table has only one column. My question is, as usual, about memory manager:
> May I write something like this:
>
> exern void getString(int row, char *s, int *len);
>
> - (id)tableView:(NSTableView *)aTableView
> objectValueForTableColumn:(NSTableColumn *)aTableColumn
> row:(int)rowIndex {
>
> char buf[255];
> int len;
>
> getString(rowIndex, buf, &len);
> return [NSString stringWithCString:buf length:len
> encoding:NSUTF8StringEncoding];
>
> }
>
> I.e. is it possible to return a NSString without its preliminary retaining?
> Or should I add [... retain] to the returning string?
>
> All examples operate by some values, stored in retained structures, like
> NSArray. Here my question originates from.
>
> Thanks.
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