CFDictionary in a CFArray

Hi all.

I'm trying to follow the HIDManager documentation to setup some Joystick/Gampage code to my app.

In my obj-c class I have started two methods (see below).

The first is incomplete as I have hit a warning that I don't understand and wish to get rid of this :

Passing 'CFArrayRef' (aka 'const struct__CFArray *') to parameter of type 'CFMutableArrayRef' ( 'const struct__CFArray *') discards qualifiers.

What's that exactly mean and how would I rectify my code to remove the warning?

Cheers

Steve

- (void) openHardwareConnection

{

HIDManager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);

CFArrayRef matchingCFArrayRef = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);

CFDictionaryRef matchingCFDictRef = [selfbuildDeviceMatchingCFDictionaryRef : kHIDPage_GenericDesktop : kHIDUsage_GD_Joystick];

CFArrayAppendValue(matchingCFArrayRef, matchingCFDictRef); // WARNING HERE

matchingCFDictRef = [selfbuildDeviceMatchingCFDictionaryRef : kHIDPage_GenericDesktop : kHIDUsage_GD_GamePad];

CFArrayAppendValue(matchingCFArrayRef, matchingCFDictRef); // WARNING HERE

CFRelease(matchingCFDictRef);

//...... more hid stuff to follow

}

- (CFMutableDictionaryRef) buildDeviceMatchingCFDictionaryRef : (UInt32) inUsagePage : (UInt32) inUsage

{

// Create a dictionary to add usage page/usages to

CFMutableDictionaryRef HIDDeviceMatchingCFDictionaryRef = CFDictionaryCreateMutable( kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks );

CFNumberRef pageCFNumberRef = CFNumberCreate( kCFAllocatorDefault, kCFNumberIntType, &inUsagePage );

CFDictionarySetValue( HIDDeviceMatchingCFDictionaryRef, CFSTR(kIOHIDDeviceUsagePageKey), pageCFNumberRef );

CFRelease(pageCFNumberRef);

CFNumberRef usageCFNumberRef = CFNumberCreate( kCFAllocatorDefault, kCFNumberIntType, &inUsage );

CFDictionarySetValue(HIDDeviceMatchingCFDictionaryRef, CFSTR(kIOHIDDeviceUsageKey), usageCFNumberRef);

CFRelease(usageCFNumberRef);

return HIDDeviceMatchingCFDictionaryRef;

}