@property (readwrite, nonatomic, assign, getter = isCancelled) BOOL canceled - xcode6 causes a compiler error

Question

I am working on xcode 5.0.2 with AFNetworking, everything works fine. when I upgraded to xcode 6 GM, I received a warning: Auto property synthesis will not synthesize property 'cancelled' because it is 'readwrite' but it will be synthesized 'readonly' via another property in this line:

 @property (readwrite, nonatomic, assign, getter = isCancelled) BOOL cancelled 

and error: Use of undeclared identifier '_cancelled'

 - (void)cancel { [self.lock lock]; if (![self isFinished] && ![self isCancelled]) { [self willChangeValueForKey:@"isCancelled"]; _cancelled = YES; <-- THIS LINE CAUSES THE ERROR [super cancel]; [self didChangeValueForKey:@"isCancelled"]; // Cancel the connection on the thread it runs on to prevent race conditions [self performSelector:@selector(cancelConnection) onThread:[[self class] networkRequestThread] withObject:nil waitUntilDone:NO modes:[self.runLoopModes allObjects]]; } [self.lock unlock]; } 

I found this answer on SO and downloaded xcode 5.1.1, copied the library as suggested to install the base sdk in 7.1, but the error remains

any suggestions?

Answer 1

NSOperation changed the names of the reading accessories for several of its properties, canceled → isCancelled and finished → isFinished (I think). Before they were methods, but now they are properties.

AFNetworking needs to be upgraded to a fixed synthesis version. In the AFURLConnectionOperation.m file, the following steps must be taken to resolve this issue.

 @synthesize cancelled = _cancelled;