JTObjectMapping

Inspired by RestKit. A very simple objective-c framework that maps a JSON response from NSDictionary or NSArray to NSObject subclasses for iOS.

Install

Original method

Copy all files in JTObjectMapping/ into your project.

CocoaPods

$ pod search JTObjectMapping, you should be able to specify the right version in your Podfile. Here's more information about CocoaPods.

Usage

Suppose this is a JSON User object response represented in NSDictionary after parsing

{
    "create_date" = "1970-01-01T00:00:00+0000";
    "p_age" = 30;
    "p_childs" =     (
        Mary,
        James
    );
    "p_name" = Bob;
    "p_title" = Manager;
    "social_networks" = {
        "twitter" = "@mystcolor";
        "facebook" = "yourFacebookID";
    }
}

Get ready with your JSON use [NSObject objectFromJSONObject:json mapping:mapping] to convert.

...
NSDictionary *json = <Parsed JSON response from above>;

//
// Use +[NSObject objectFromJSONObject:mapping:] to convert 
// the NSDictionary into your JTUserTest object
//
JTUserTest *user = [JTUserTest objectFromJSONObject:json mapping:mapping];
...

Define necessary mappings, from a dictionary key to a property keyPath.

// Define the mapping of a nested custom object - JTSocialNetworkTest
NSDictionary *socialNetworkMapping = [NSDictionary dictionaryWithObjectsAndKeys:
                                           @"twitterID", @"twitter",
                                           @"facebookID", @"facebook",
                                       nil];

NSDictionary *mapping = [NSDictionary dictionaryWithObjectsAndKeys:
                @"name", @"p_name",
                @"title", @"p_title",
                @"age", @"p_age",
                @"childs", @"p_childs",                    
                [NSDate mappingWithKey:@"createDate"
                      dateFormatString:@"yyyy-MM-dd'T'HH:mm:ssZ"], @"create_date",
                [JTSocialNetworkTest mappingWithKey:@"socialNetwork"
                                            mapping:socialNetworkMapping], @"social_networks",
                nil];

Of course you need to define your own User object with corresponding @synthesize properties, and thats all for what you need.

// JTSocialNetworkTest.h

@interface JTSocialNetworkTest
@property (nonatomic, copy) NSString *twitter;
@property (nonatomic, copy) NSString *facebook;
@end

// JTSocialNetworkTest.m
@implementation
@end

// JTUserTest.h

@interface JTUserTest : NSObject

@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSNumber *age;
@property (nonatomic, strong) NSDate *createDate;
@property (nonatomic, strong) NSArray *childs;
@property (nonatomic, strong) JTSocialNetworkTest *socialNetwork;

@end

// JTUserTest.m
#import "JTUserTest.h"

@implementation JTUserTest
@end

For more detailed usage, see JTObjectMappingTests.m, will be adding more detailed description soon.

Update Logs

v1.1

Refactored JTObjectMapping. Now extending custom mappings are much more cleaner.
Proper keyPath support.

v1.0.7

Added JTSetMapping and JTDateEpochMappings, thanks to @zcharter for making this happen!

v1.0.6

Added experimental keypath support. use #define JTOBJECTMAPPING_DISABLE_KEYPATH_SUPPORT = 1 to disable it.

v1.0.5

Fixed nested array causing crash

v1.0.4

Added auto NSDictionary value to NSObject property mapping with the same key defined
Fixed false possible JSON response in NSArray use case

v1.0.3

Add raw array JSON response support

v1.0.2

Added NSArray support

v1.0.1