[fitter]

I'm working on a small app (for the sake of learning Obj-C) that uses an NSTextView. When the user clicks on the lone button available, some things are written to the NSTextView.

I'd like to delete the original contents of the text field every time the button is clicked, replacing them with the new contents. As it stands now, the new text is merely appended to the old.

Any suggestions? At the moment, I'm using insertText: to add text to the NSTextView.

[Ghoser777]

Use [yourTextView setString:""];

Atleast i think that's what it was...

HTH,
F-bacher

[seb2]

Originally posted by Ghoser777:
<STRONG>Use [yourTextView setString:""];
</STRONG>

<font face = "courier">
shouldn't that be [yourTextView setString:@""];
</font>
...?

[edit: my way of marking the change didn't work, note the "@" behind the colon]

[ 10-25-2001: Message edited by: seb2 ]

[Ghoser777]

Bah, I'm a java guy learning Obj-C, we forget @'s every once in a while

Sorry,
F-bacher

[fitter]

Thanks much to you both. That's what I was looking for.

[amonitzer]

Forgetting the @ is pretty bad. It just produces a warning at compile time, but it's a bad crash (SIGBUS) at runtime. I already spend HOURS by looking for a memory problem in my app when all I did wrong was to forget an @.

[Ghoser777]

Same here; It took me forever to figure out why all these @'s where in Objective-C code. String objects in Java are so much easier (and so much more intuitive for that matter).

F-bacher

[TheBum]

Originally posted by Ghoser777:
<STRONG>Same here; It took me forever to figure out why all these @'s where in Objective-C code. String objects in Java are so much easier (and so much more intuitive for that matter).

F-bacher</STRONG>

You can always avoid the "@" notation if it annoys you. Just use

[yourTextView setString:[[NSString alloc] initWithCString:""]];

[ 10-26-2001: Message edited by: TheBum ]

[lindberg]

Actually, that's a memory leak. You'd need:

[yourTextView setString:[NSString stringWithCString:""]];

or just

[yourTextView setString:[NSString string]];

but of course the @"" is easiest and best.

Since Objective-C is an extension of ANSI C, regular old "" still has to mean constant c-strings, so ObjC has to use @"" to represent constant NSString objects. Slightly annoying, but you can get used to it. Just don't ever ignore those compiler warnings :-)

[Angus_D]

Well, @"" is nice when you compare it to CFSTR(""), which is how you declare constant CFStrings