How use RestKit 2.X in iOS? - ios

Question

I'm new using RestKit, but I can't understand at all how it works...
please, can somewhere explain me it??
My Json file is:
{
"colors":
{
"red":"#f00",
"green":"#0f0",
"blue":"#00f",
"cyan":"#0ff",
"magenta":"#f0f",
"yellow":"#ff0",
"black":"#000"
}
}
and the path where i'm hosting this file is: http://186.36.181.116/tesis/file.json
The code that I'm trying in my ViewDidLoad method is:
- (void)viewDidLoad
{
[super viewDidLoad];
RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[colores class]];
[mapping addAttributeMappingsFromArray:#[#"colors"]];
NSIndexSet *statusCodes = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful); // Anything in 2xx
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping method:RKRequestMethodAny pathPattern:#"/tesis/:coloresID" keyPath:#"colors" statusCodes:statusCodes];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://186.36.181.116/tesis/file.json"]];
RKObjectRequestOperation *operation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:#[responseDescriptor]];
[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *result) {
colores *colores = [result firstObject];
NSLog(#"Mapped the article: %#", colores);
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(#"Failed with error: %#", [error localizedDescription]);
}];
[operation start];
}
My Class "colores" is as follow:
#import <Foundation/Foundation.h>
#interface colores : NSObject{}
#property (weak, nonatomic) IBOutlet NSString *colores;
#end
Thank you so much in advance!!

Answer 1

you can find a detailed tutorial here and full source code github.
In order to properly map responses to JSON, we must do the following things:
*Create an instance of RKEntityMapping for each entity in our managed object model
*Add mappings between JSON response keys and object properties
*Add mappings between embedded JSON objects and relationships
*Create response descriptors with the mappings
*Optional: Create request descriptors with the mappings if you plan to PUT or POST