JSAutoEncodedObject

Automatically encode or decode any Objective-C object

No need to write manual NSCoding implementations, just inherit from JSAutoEncodedObject and all NSData encoding and decoding will be done automatically for your class.
Provides an override point, to let you specify any properties you don't want to encode for a specific class.
Super-useful when working with Apple's NSData-based APIs, such as NSUserDefaults or GameCenter.

Here's how to use JSAutoEncodedObject:

1. Inherit from JSAutoEncodedObject

#import "JSAutoEncodedObject.h"

@interface MyClass : JSAutoEncodedObject

@end

2. Optional: Provide a schema that JSAutoEncodedObject will use when encoding/decoding your objects

+ (JSAutoEncodedObjectSchema *)schema
{
	return [JSAutoEncodedObjectSchema schemaFromDictionary:@{
		@"property1": @"p1",
		@"property2": @"p2"
	}];
}

3. Optional: Override -encodedValueForPropertyNamed: and/or -setValueForPropertyNamed:toDecodedValue: to add custom encoding/decoding to a specific property

- (id)encodedValueForPropertyNamed:(NSString *)propertyName
{
	if ([propertyName isEqualToString:@"specialProperty"]) {
		return [self.specialProperty stringByAppendingString:@"aCustomSuffix"];
	}

	return [super encodedValueForPropertyNamed:propertyName];
}

- (void)setValueForPropertyNamed:(NSString *)propertyName toDecodedValue:(id)decodedValue
{
	if ([propertyName isEqualToString:@"specialProperty"]) {
		NSString *decodedString = [decodedValue stringByReplacingOccurrencesOfString:@"aCustomSuffix" withString:@""];
		[super setValueForPropertyNamed:propertyName toDecodedValue:decodedString];
		return;
	}

	[super setValueForPropertyNamed:propertyName toDecodedValue:decodedValue];
}

4. Done! You can now encode or decode instaces of your class and let JSAutoEncodedObject take care of the rest

NSData *data = [NSKeyedArchiver archivedDataWithRootObject:myClassInstance];

Parse-support

JSAutoEncodedObject also comes with Parse-support for converting your model objects to/from Parse's PFObject (see www.parse.com for more info). Parse-support is provided through the JSAutoEncodedObject+Prase category.

Hope that you'll enjoy using JSAutoEncodedObject!

Why not give me a shout on Twitter: @johnsundell

datadanne / JSAutoEncodedObject