Latest 1.0
License MIT
Platforms ios , requires ARC
Authors ,

NSObject+NSCoding and Archiver

build by Kingiol

Build Status

Mike Mayo
Rackspace Mobile Apps
[email protected]
twitter: @greenisus

These are some simple classes to make object persistence with NSCoding easier. This code was extracted from
the Rackspace Cloud / OpenStack iOS app at



NSObject-NSCoding is easiest to install using CocoaPods.
Simply add this line to your Podfile

pod 'NSObject-NSCoding'

and run pod install


If you prefer not to use CocoaPods, simply drag Archiver.h, Archiver.m, NSObject+NSCoding.h, and NSObject+NSCoding.m into your project.

Then, right click Frameworks in Groups & Files and choose Add -> Existing Frameworks... and choose libobjc.A.dylib.



This class will read and write objects that conform to the NSCoding protocol to disk.

SomeClass *myObject = [[[SomeClass alloc] init] autorelease];
myObject.someProperty = @"Hello world";

[Archiver persist:myObject key:@"myObject"];

// later on somewhere else...

SomeClass *myObject = [Archiver retrieve:@"myObject"];


This category simplifies implementing NSCoding by iterating over the properties of your
class and encoding/decoding them for you. It persists primitives (such as ints and floats)
as well as any objects that conform to NSCoding.

In your class header, conform to NSCoding:

@interface Model : NSObject <NSCoding>

In your class implementation, call the automatic methods:

- (void)encodeWithCoder:(NSCoder *)coder {
   [self autoEncodeWithCoder:coder];

- (id)initWithCoder:(NSCoder *)coder {
    if (self = [super init]) {
        [self autoDecode:coder];
    return self;


NSObject+NSCoding is released under the MIT license. A full description of that license is available in the LICENSE file.

Latest podspec

    "name": "NSObject-NSCoding",
    "version": "1.0",
    "summary": "Automatic NSCoding and persistence implementation",
    "homepage": "",
    "license": {
        "type": "MIT",
        "file": "LICENSE"
    "authors": {
        "greenisus": "[email protected]",
        "kingiol": "[email protected]"
    "platforms": {
        "ios": null
    "source": {
        "git": "",
        "tag": "1.0"
    "source_files": "*.{h,m}",
    "requires_arc": true

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