To use it as a mutable array, you will have to create a mutable array from the vanilla array returned by componentsSeparatedByString.

E.g.

NSMutableArray *listItems = [NSMutableArray array];
[listItems addObjectsFromArray: [list componentsSeparatedByString:@", "]];

Now, that being said, I'm not sure why you're getting the warning about distinct ObjC types.

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On Feb 21, 2008, at 1:48 PM, Philip Bridson wrote:

Hi Guys,

I'm trying to do this:

NSString *list = @"wrenches, hammers, saws";

NSArray *listItems = [list componentsSeparatedByString:@", "];

Which is straight out of the documentation and I want to use a Mutable Array instead, but I get this warning:

warning: initialization from distinct Objective-C type

then I want to add an object like so:
        
        [listItems addObject:newObject];

        But when I run the program it halts and says the following:

         -[NSCFArray addObject:]: mutating method sent to immutable object

        Does anyone know what is going on?

        Phil
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