On 23 Jul 2012, at 09:00, Andreas Grosam <[email protected]> wrote:
> Suppose, I have C-arrays defined as follows:
>
> int count = [dictionary count];
> id __unsafe_unretained values[count];
> id __unsafe_unretained keys[count];
>
>
> I fill these arrays with:
>
> [dictionary getObjects:values andKeys:keys];
>
>
>
> Now, I would like to "reuse" these arrays through holding objects maintained
> by ARC (if possible):
>
> for (int i = 0; i < count; ++i) {
> keys[i] = [keys[i] copy];
> values[i] = [values[i]] copy];
> }
> NSDictionary *other = [NSDictionary dictionaryWithObjects:values forKeys:keys
> count:count];
>
>
>
> This won't work in ARC, since the arrays are declared __unsafe_unretained and
> this would cause the newly created object immediately be deallocated once it
> is assigned to the array's element.
>
> What I would like to avoid is to use separate arrays (appropriately
> declared), and also avoid to disable ARC and maintain the release counts
> manually.
>
> Is there a way to extend the lifetime of the created objects, or is there a
> way to "re-declare" the arrays so that ARC can maintain the references - or
> is there any other simple "trick"?
>
>
> Thanks for suggestions! ;)
I think all this begs the questions:
- Why do you want to get these objects stored in arrays rather than a
dictionary?
- Why C arrays, rather than NSArray?
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