Your AudionetQueueDelegate protocol is probably not inheriting from
<NSObject> (the protocol) so it warns that valueForKeyPath: is not
found. It'll also probably complain about methods like
respondsToSelector: which is also part of the NSObject protocol.
You need to write your protocol declaration in
AudionetQueueDelegateProtocol.h as:
@protocol AudionetQueueDelegate <NSObject>
...
@end
Then it should silence the warnings and no casting is required (which
is not the correct solution in this case I believe).
On 16 Nov 2010, at 10:35:31, Remco Poelstra wrote:
Hi,
I've somewhat the same problem as a recent thread, but I can't fix
it with what was suggested in that thread.
I've to following class:
#import <Foundation/Foundation.h>
#import "AudionetCommand.h"
#import "AudionetQueueDelegateProtocol.h"
@interface AudionetCommandQueue : NSObject {
id <AudionetQueueDelegate> delegate;
}
@property (nonatomic, assign) id <AudionetQueueDelegate> delegate;
- (void) enqueueCommand:(AudionetCommand *)command;
@end
@implementation AudionetCommandQueue
@synthesize delegate;
- (void) enqueueCommand:(AudionetCommand *)command {
//Lots of code
if ([[delegate valueForKeyPath:@"audionetDevices.address"] isEqual:
[]]) {};
}
@end
I get the warning that valueForKeyPath: is not found in the
protocols. If I change the instance variable to id
<AudionetQueueDelegate,NSKeyValueCoding>, I get the error that the
NSKeyValueCoding protocol can not be found. If I also #import
<NSKeyValueCodingProtocol.h> than that header file is not found.
How can I fix this?
Kind regards,
Remco Poelstra
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