While all theses methods may look valid, what not simply use a static variable
declared in your file ?
Instead of trying to use complex approach to hide the fact you need a global,
just use one, and don't try to reuse the existing one for things there are not
designed to do.
static id myCallbackHandler;
void someCallBack() {
[myCallbackHandler handleCallBack];
}
- (void)foo {
myCallbackHandler = self;
callCFunctionWithCallBack(someCallBack);
myCallbackHandler = nil;
}
Le 30 juil. 2013 à 15:44, Maxthon Chan <xcvi...@me.com> a écrit :
> My common way of handling this would be NSNotificationCenter. It is a
> singleton so I am always sure that it is there, and I can wrap all parameters
> into the userInfo dictionary.
>
> Sent from my iPhone
>
>> On 2013年7月30日, at 21:19, KappA <rejek...@gmail.com> wrote:
>>
>> I sometimes just access my objc-objects from a C thread-proc via the
>> AppDelegate (providing there's a trail to the object I need, which there
>> usually is)... If the callback void pointer parameter isn't being used for
>> something else, you can simply cast the object in there... or if you need
>> multiple parameters you can create a struct that stores what you need and
>> pass that. Not sure if this helps but figured I'd mention it.
>>
>> AppDelegate *d = [[UIApplication sharedApplication] delegate];
>>
>>
>>
>>> On Tue, Jul 30, 2013 at 8:53 AM, lowell <lowe...@me.com> wrote:
>>>
>>> The first two parameters to the function have to be an id and a SEL ...
>>>
>>> typedef id (*IMP)(id, SEL, ...);
>>>
>>> ... (this is where we get self and _cmd, by the way) followed by the rest
>>> of the method params, if any.
>>>
>>>
>>> lowell
>>>
>>>
>>>> On Jul 30, 2013, at 12:59 AM, Vincent Habchi <vi...@macports.org> wrote:
>>>>
>>>> Hi everybody,
>>>>
>>>> I have a very simple question: if I embed a C-function (more precisely,
>>> a callback from an external C-library) in an Obj-C object, can I expect
>>> this function to behave like a regular method? I.e. can it freely access
>>> ‘self’ and other attributes?
>>>>
>>>> Thanks a lot!
>>>> Vincent
>>>>
>>>>
>>>>
>>>>
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