Question

Hi i have a function on a class which is like this :

- (Float32)averagePower {   
    if (![self isListening])
        return 0.0;
    float tmp = [self levels][0].mAveragePower;
    tmp = tmp * 100;
    NSLog(@"%f",  tmp);
    return tmp;
}

i am calling it from viewdidload of another class like this:

SoundSensor *theInstance = [[SoundSensor alloc] init];
    [theInstance listen];
    Float32 tmp;
    [theInstance averagePower:tmp];

now i can call to listen but when calling to averagepower i got warning that it may not respond and the function is crashing in simulation.
what i do wrong ?

thanks a lot.

Answer 1

You are trying to pass a variable to a function that accepts no parameters.

What I expect you meant to do is this:

Float32 tmp = [theInstance averagePower];