nscoding

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 inside the routines (unless my idea of an NSCoding compliant class are totally screwed up!) The UIImageView class is NSCoding compliant. So I should not have to bother how it will be serialized/de-serialized using the NSKeyedArchiver and NSKeyedUnarchiver classes. But every time I try and encode a UIImageView object, I get an error that UIImage does not recognize encodeWithCoder: method. Now the

I've been searching for an article that explains NSCoding (NSKeyedArchiver...) advantages and disadvantages over use of CoreData (SQLite....). There's a lot of options, I can implement my own custom binary reader/writer, or use plists/xml/json... or use SQLite or NSCoding. I'm kind of lost right now. Can any body explain what's the difference between the MAIN features? It depends which kind of data you want to save and whether you will use it only internally or you have to exchange the data with an external service. NSCoding is generally speaking a data serializer. A lot of built-in objects

I am blocking into something and I am sure it is too big. I have a custom object that look like this @interface DownloadObject : NSObject <NSCoding>{ NSNumber *key; NSString *name; NSNumber *progress; NSNumber *progressBytes; NSNumber *size; NSString *path; } @property (copy) NSNumber *key; @property (copy) NSString *name; @property (copy) NSNumber *progress; @property (copy) NSNumber *size; @property (copy) NSString *path; @property (copy) NSNumber *progressBytes; -(id)initWithKey:(NSNumber *)k name:(NSString *)n progress:(NSNumber *)pro size:(NSNumber *)s path:(NSString *)p progressBytes:

I created a Swift class that conforms to NSCoding. (Xcode 6 GM, Swift 1.0) import Foundation private var nextNonce = 1000 class Command: NSCoding { let nonce: Int let string: String! init(string: String) { self.nonce = nextNonce++ self.string = string } required init(coder aDecoder: NSCoder) { nonce = aDecoder.decodeIntegerForKey("nonce") string = aDecoder.decodeObjectForKey("string") as String } func encodeWithCoder(aCoder: NSCoder) { aCoder.encodeInteger(nonce, forKey: "nonce") aCoder.encodeObject(string, forKey: "string") } } But when I call... let data = NSKeyedArchiver