Re: NSTextView/NSMutableArray problem!
Re: NSTextView/NSMutableArray problem!
- Subject: Re: NSTextView/NSMutableArray problem!
- From: Greg Hulands <email@hidden>
- Date: Tue, 27 May 2003 19:13:53 +1000
I don't know exactly why it would loose the string because an NSArray
increases the retain count. My rule of thumb is that if a NS class
returns a basic object like NSString or NSNumber then I just copy it
first, that way I know I own the object and not another part of the
system.
From the docs of NSText the super class of NSTextView
Returns the characters of the receiver's text. For performance reasons,
this method returns the current backing store of the text object. If
you want to maintain a snapshot of this as you manipulate the text
storage, you should make a copy of the appropriate substring.
Greg
On Tuesday, May 27, 2003, at 05:31 PM, Peter Karlsson wrote:
>
Hi Greg!
>
>
Yes, that was the problem, can you please explain this a little
>
futher. Why was the string not released when I used a NSTextField for
>
example?
>
>
Thanks a lot :-)
>
>
Peter
>
>
> From: Greg Hulands <email@hidden>
>
> To: "Peter Karlsson" <email@hidden>
>
> CC: email@hidden
>
> Subject: Re: NSTextView/NSMutableArray problem!
>
> Date: Tue, 27 May 2003 17:22:10 +1000
>
>
>
> It is possible that the string passed is getting released. Have you
>
> tried
>
> [myMutableArray replaceObjectAtIndex: 0 withObject:[[myTextViewOutlet
>
> string] copy]];
>
>
>
> HTH,
>
> Greg
>
>
>
> On Tuesday, May 27, 2003, at 04:46 PM, Peter Karlsson wrote:
>
>
>
>> Dear list!
>
>>
>
>> I have a strange bug in my code, look at the following code
>
>> snippet...
>
>>
>
>> // This works!!!
>
>> [myTextViewOutlet setString:@"Cocoa"];
>
>>
>
>> // This works!!!
>
>> [myMutableArray replaceObjectAtIndex: 0 withObject:[myTextViewOutlet
>
>> string]];
>
>>
>
>> // But not this!!!
>
>> [myTextViewOutlet setString:[myMutableArray objectAtIndex:0]];
>
>>
>
>> Can someone tell me why the last line don't work with a NSTextView
>
>> please? I get no errors and the TextView is empty after the code is
>
>> executed, I was expecting "Cocoa" in the TextView as he result. It
>
>> works if I use a NStextField like this.
>
>>
>
>> [myTextFieldOutlet setStringValue:[myMutableArray objectAtIndex:0]];
>
>>
>
>> Peter
>
>>
>
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