我创建了一个符合NSCoding的Swift类。(Xcode6GM,Swift1.0)importFoundationprivatevarnextNonce=1000classCommand:NSCoding{letnonce:Intletstring:String!init(string:String){self.nonce=nextNonce++self.string=string}requiredinit(coderaDecoder:NSCoder){nonce=aDecoder.decodeIntegerForKey("nonce")string=aDecoder.decode