How can I decode an object when original class is not available?

Question

I have an iOS 7 application that saves a custom object to app\'s iCloud Docs folder as a file. For this, I make use of NSCoding protocol.

@interface Person : NSO         


        

Answer 1

newacct's answer helped me with the class name, but I also had an issue where I changed a variable name in my Swift class from my Objective-C class. Using @objc() fixed that as well:

Old Class:

@interface JALProgressData : NSObject 

@property (nullable, nonatomic, strong) NSString *platformID;
@property (nonatomic, assign) NSTimeInterval secondsPlayed;
@property (nonatomic, assign) NSTimeInterval totalDuration;
@property (nullable, nonatomic, strong) NSDate *lastUpdated;

@end

New Class:

@objc(JALProgressData)
class VideoProgress: NSObject, NSCoding {
    @objc(platformID) var videoId: String?
    var secondsPlayed: NSTimeInterval?
    var totalDuration: NSTimeInterval?
    var lastUpdated: NSDate?
}

I also realized I was using encodeObject decodeObjectForKey for value types, which was causing issues with my Swift class. Switching to encodeDouble and decodeDoubleForKey for the NSTimeInterval types fixed aDecoder returning nil for those values.