When using NSCoding and decoding values, is there a way to tell if a value exists for a given key? In other words, what I'm trying to do is... if([decoder valueExistsForKey:@"myKey"]) //valueExist...

Ideally an NSCoding compliant class will work as expected using encodeWithCoder: and initWithCoder: (at least I thought so till recently) without the developer having to bother about what goes on i...

I have an NSData that was created by using NSKeyedArchiver. Is there a way to iterate over all the values inside it? It must somehow be possible to get all the keys that were stored in it when usin...

I have an interface: #import <Foundation/Foundation.h> @interface Picture : NSObject; @property (readonly) NSString *filepath; - (UIImage *)image; @end and implementation: #import "Pic...

I know that when you write the initWithCoder method of a subclass of an object that implements NSCoding you have to call super initWithCoder (instead of super init), but do I have to call super enc...

I've never used NSCoding before and I'm very confused about how it should be implemented. My current iPad app has a UIImageView (called "background") which is a property of my main view controller...

A have a number of NSValue (obtained via KVC valueForKey) that I need to append to an NSData object in order to send it over the network using Game Center. Obviously I will also need to convert the...

I have an iOS application with data persisted using NSCoding and more precisely NSKeyedArchiver. This application is already available on the App Store. I'm working on version 2 of the application...

I was trying to serialize a SearchEntity object(custom object) containing an NSMutableDictionary containing a set of type CategoryEntity(custom object). 1 SearchEntity<NSCoding> containing: ...

I'm building an application that utilises NSCoding to save NSObject's to a documentPath. I'm having no issues doing this, I'm just curious about something. I have MACompany, which implements NSCod...

I am using NSCoding to archive/unarchive a custom class as a method of data persistence. It works fine if the object is a subclass of NSObject, but I also have objects that are subclasses of custom...

I have a custom class that I wish to save and load. The class contains an NSDate, an NSString, and an NSNumber. I have implemented the NSCoding protocol in the .h file. Here is the code I have so f...

Base on the documentation and sample code that I have gone through, I got an impression that when a class defined in xcode is read into and configured in Interface Builder, an object based on the c...

I have objects containing Quartz-2D references (describing colors, fill patterns, gradients and shadows) in Cocoa. I would like to implement the NSCoding protocol in my objects and thus need to ser...

My issue is then I retrieve my NSArray of Store objects, all my NSString properties are causing BadAccess errors. The int and double properties work fine! store.h @interface Store : NSObject<...

Is it possible to encode an Objective-C block with an NSKeyedArchiver? I don't think a Block object is NSCoding-compliant, therefore [coder encodeObject:block forKey:@"block"] does not work? Any ...

I've implemented an save on applicationWillTerminate and load on applicationWillFinishLoading. There is a complete object tree, all implement the NSCoding protocol and I've check the types I enter....