I have this method:
+ (NSData *) createWave: (short[])sampleData {
int i = [sampleData count]; // Warning: Invalid receiver type 'short int *'
}
Inside this method, I'm trying to determine how many elements are in the samples array that was passed in. But I'm getting the warning above (I get the same warning if I change samples to short *).
How can I pass an array like this, and then determine the array's size?
You can't.
Either make sure that the last element in your array is unique and check for that or pass in a size parameter as well i.e.
+ (NSData *) createWave:(short [])samples size:(size_t)count {
int i = count;
}
short[] isn't an object so you can't call methods on it - that's why you're getting a warning (and probably a crash if you run the code!)
count, otherwise it defaults to id.
+ (NSData *) createWave:(short [])samples size:(size_t)count;
You are trying to use a C style array as a parameter and then access it as an Objective-C object. (I am assuming sampleData and samples are supposed to be the same). Use an NSArray of NSNumbers instead because with C style arrays you need to know the length.
+ (NSData *) createWave: (NSArray*)sampleData {
int i = [sampleData count];
}
NSArray here for performance reasons - this is raw audio data, which can be quite large.