How to access to an object inside a C function

Question

I need to get access to an object inside a C function similar to this few code

@interface MixerHostAudio ()  <UIApplicationDelegate>
@property (readwrite) int *alternativeOutput;
@end

@implementation MyCode
@synthesize alternative

void audioInputAvailable () {
   alternative=1;
}

I get this error: " 'Use of undeclared identifier 'alternative' "

Any ideas about how can i solve it ?

If you want to @synthesize a @property as something other than its exact name, you have to use the format: @synthesize propertyName = synthesizedName;. But chances are pretty good that you should be accessing them via self. anyway. — nhgrif
– nhgrif, Commented Jan 24, 2014 at 0:56
Remember that every instance variable has a meaning only if it's associated with an object. Instead inside a function, since it's not a method, you can't access to self, you aren't "inside an object". — Ramy Al Zuhouri
– Ramy Al Zuhouri, Commented Jan 24, 2014 at 1:41

Michael Dautermann · Accepted Answer · 2014-01-24 00:53:05Z

4

You have to make your "MyCode" object available somewhere for your C glue function to pick up. For example, if you have a pointer to your MyCode object...

void audioInputAvailable(MyCode *myCodeObject){
   myCodeObject.alternative = 1;
}

answered Jan 24, 2014 at 0:53

Michael Dautermann

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