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Re: NSMutableArray is immutable when unarchived
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Re: NSMutableArray is immutable when unarchived


  • Subject: Re: NSMutableArray is immutable when unarchived
  • From: nick briggs <email@hidden>
  • Date: Fri, 15 Jul 2005 13:58:12 +0100

Well yes, [NSMutableArray array] is definitely mutable, else [_triggers addObject:trigger] would fail...

... using [[NSMutableArray alloc] init] still produces the immutable error :(

Not the behavior I'd expect, easy enough to work around, but why the necessity for an ugly hack?

Nick






On 15 Jul 2005, at 13:47, SA Dev wrote:


Allow me to post a retraction ... this seems like it may not be correct according to the docs: "+array Creates and returns an empty array. This method is used by mutable subclasses of NSArray."


I'd personally still use _triggers = [[NSMutableArray alloc] init]; which will work, but I might be wrong here in your situation.

  Anybody??



On Jul 15, 2005, at 8:41 AM, SA Dev wrote:


Nick:

You're replacing your _triggers NSMutableArray with an NSArray on init. :-)

  [NSMutableArray array] returns an NSArray - immutable.

Try:

_triggers = [[NSMutableArray alloc] init];



On Jul 15, 2005, at 6:02 AM, nick briggs wrote:



- (id)initWithObject:(id)anObject
{
    if(self = [super init])
    {
        ...
        _triggers = [[NSMutableArray array]retain];
        ...
    }
    return self;
}



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References: 
 >NSMutableArray is immutable when unarchived (From: nick briggs <email@hidden>)
 >Re: NSMutableArray is immutable when unarchived (From: SA Dev <email@hidden>)
 >Re: NSMutableArray is immutable when unarchived (From: SA Dev <email@hidden>)

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