nscoder

Objective C – How do I use initWithCoder method?

You also need to define the following method as follows: – (void)encodeWithCoder:(NSCoder *)enCoder { [super encodeWithCoder:enCoder]; [enCoder encodeObject:instanceVariable forKey:INSTANCEVARIABLE_KEY]; // Similarly for the other instance variables. …. } And in the initWithCoder method initialize as follows: – (id)initWithCoder:(NSCoder *)aDecoder { if(self = [super initWithCoder:aDecoder]) { self.instanceVariable = [aDecoder decodeObjectForKey:INSTANCEVARIABLE_KEY]; // similarly for other instance variables … Read more

How do I encode enum using NSCoder in swift?

You need to convert the enum to and from the raw value. In Swift 1.2 (Xcode 6.3), this would look like this: class AppState : NSObject, NSCoding { var idx = 0 var stage = Stage.DisplayAll override init() {} required init(coder aDecoder: NSCoder) { self.idx = aDecoder.decodeIntegerForKey( “idx” ) self.stage = Stage(rawValue: (aDecoder.decodeObjectForKey( “stage” ) … Read more