Error with loading objects from a Response(RestKit)

Your API returns HTTP Error 401 Unauthorized. Does your backend require a HTTP authentication? If so, supply the correct credentials to the RKClient:

[[RKClient sharedClient] setUsername:myUsername];[[RKClient sharedClient] setPassword:myPassword];

edit:

I believe you have some fundamental problems in setting up the RestKit. Consider the following example.

//in your appdelegateRKObjectManager* manager = [RKObjectManager objectManagerWithBaseURL:@"http://localhost:8080/activiti-rest/service"]; [[RKClient sharedClient] setUsername:@"kermit"];[RKClient sharedClient] setPassword:@"kermit"];// don't forget to create your mapping hereRKObjectMapping *dataMapping = [RKObjectMapping mappingForClass:[Data class]];[dataMapping mapKeyPath:@"myKeyPath" toAttribute:@"myAttr"];[[manager mappingProvider] addObjectMapping: dataMapping];

then, you can do just this.

 -(void)loadData{    // fetch your mapping    [RKObjectMapping *mapping = [[RKObjectManager sharedManager].mappingProvider objectMappingForClass:[Data class]];     //request data    [[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/process-definitions?start=0&size=10&sort=id&order=asc" objectMapping:mapping delegate:self];}

Firstly, you need to do the setup (RKClient, mappings and RKObjectManager) - you do it just once. They are singletons, so the settings are kept. I found that best place to do this is the AppDelegate - feel free to experiment, but be sure to make the setup before you do any requests.

When you are about to do any requests just use your [[RKObjectManager sharedManager] singleton to load the actual objects.

Also, i recommend you reading some documentation, eg. the Object Mapping guide