Declare & implement an iOS method with blocks, but no other parameters

Question

Need help declaring and implementing a method with blocks but no parameters. Sounds simple but I'm missing something because this works:

- (void) RetrieveDevices: (NSInteger)count
         success:(void (^)(NSMutableArray *devices))success
         failure:(void (^)(aylaError *err))failure;

- (void)RetrieveDevices:(NSInteger)count
        success:(void (^)(NSMutableArray *devices))successBlock
        failure:(void (^)(aylaError *err))failureBlock
{

}

And this won't compile as it's expecting a method body:

- (void) RetrieveDevices
             success:(void (^)(NSMutableArray *devices))success
             failure:(void (^)(aylaError *err))failure;

- (void)RetrieveDevices
            success:(void (^)(NSMutableArray *devices))successBlock
            failure:(void (^)(aylaError *err))failureBlock
{

}

Appreciate the help.

Answer 1

Blocks are parameters. So you want a method signature with two parameters. Try e.g.:

- (void) RetrieveDevicesWithSuccess:(void (^)(NSMutableArray *devices))success
                            failure:(void (^)(aylaError *err))failure;

Answer 2

The problem is the newline and whitespace between "RetrieveDevices" and "success"/"failure". Try this instead:

- (void)RetrieveDevicesOnSuccess:(void (^)(NSMutableArray *devices))successBlock
                       onFailure:(void (^)(aylaError *err))failureBlock
{

}