Re: Can't get setDelegate to work on NSMenu attached to NSStatusItem
Re: Can't get setDelegate to work on NSMenu attached to NSStatusItem
- Subject: Re: Can't get setDelegate to work on NSMenu attached to NSStatusItem
- From: Nick Zitzmann <email@hidden>
- Date: Tue, 3 Mar 2009 13:50:28 -0700
On Mar 3, 2009, at 1:33 PM, Quincey Morris wrote:
I don't know of any documented API contract that says [NSMenu
initWithTitle:] never fails, so checking the returned value seems
prudent.
In the case of Apple's documentation, it's the other way around.
Unless the documentation mentions that it may return nil, it's
guaranteed to return something. See NSPipe's documentation for such an
example.
In addition, I've always assumed that 'alloc' could potentially
return nil. In that case, the result of the initialization would be
nil too, and so needs to be checked. (Is that wrong? Is an exception
thrown if there is no memory available? If so, is that documented
somewhere?)
It doesn't seem to be documented, but I think it will return nil only
if (1) there was not enough contiguous RAM in the program's VM space
to allocate the object, or (2) there was, but the user has run out of
disk space for swap files. But if this happens, the program is pretty
much screwed anyway, because it's going to crash. No exception is
thrown, but the function szone_error() is called, and you can break on
that.
Nick Zitzmann
<http://www.chronosnet.com/>
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