尝试使用NSCoder时出错
Player.swift：
class Player: NSObject,NSCoding {
private var _playerName: String!
private var _playerscore: Int!
private var _playerColor: PlayerColor! //PlayerColor is an enum
var playerName: String {
get {
return _playerName
}
set {
_playerName = newValue
}
}
var playerscore: Int {
get {
return _playerscore
}
set {
_playerscore = newValue
}
}
var playerColor: PlayerColor {
get {
return _playerColor
}
set {
_playerColor = newValue
}
}
init(playerName: String,playerscore: Int,playerColor: PlayerColor) {
_playerName = playerName
_playerscore = playerscore
_playerColor = playerColor
}
required convenience init(coder aDecoder: NSCoder) {
let name = aDecoder.decodeObject(forKey: "name") as! String
let score = aDecoder.decodeInteger(forKey: "score")
let color = aDecoder.decodeObject(forKey: "color") as! PlayerColor
self.init(playerName: name,playerscore: score,playerColor: color)
}
func encode(with aCoder: NSCoder){
aCoder.encode(playerName,forKey: "name")
aCoder.encode(playerscore,forKey: "score")
aCoder.encode(playerColor,forKey: "color")
}
}
在PlayerStore.swift中：
// Storage Functions
func savePlayers(){
let encodedData = NSKeyedArchiver.archivedData(withRootObject: _playerArray) // _playerarray is a [Player] the very object I want to store/retrieve at will
defaults.set(encodedData,forKey: playerKeyForDefaults) //defaults is just var NSUserDefaults.standard
defaults.synchronize()
}
func loadPlayers(){
if let decoded = defaults.object(forKey: playerKeyForDefaults) as? NSData {
let array = NSKeyedUnarchiver.unarchiveObject(with: decoded as Data) as! [Player]
_playerArray = array
}
}
解决方法
这是我实施的解决方案：
Player.swift：
import Foundation
class Player: NSObject,NSCoding {
private var name: String!
private var score: Int!
private var color: String!
var playerName: String {
get {
return name
}
set {
name = newValue
}
}
var playerscore: Int {
get {
return score
}
set {
score = newValue
}
}
var playerColor: String {
get {
return color
}
set {
color = newValue
}
}
init(playerName: String,playerColor: String) {
name = playerName
score = playerscore
color = playerColor
}
required convenience init(coder aDecoder: NSCoder) {
let name = aDecoder.decodeObject(forKey: "name") as! String
let score = aDecoder.decodeObject(forKey: "score") as! Int
let color = aDecoder.decodeObject(forKey: "color") as! String
self.init(playerName: name,playerColor: color)
}
func encode(with aCoder: NSCoder){
aCoder.encode(name,forKey: "name")
aCoder.encode(score,forKey: "score")
aCoder.encode(color,forKey: "color")
}
}
PlayerStore.swift：
func savePlayers(){
let encodedData = NSKeyedArchiver.archivedData(withRootObject: _playerArray)
defaults.set(encodedData,forKey: playerKeyForDefaults)
}
func loadPlayers(){
if let decoded = defaults.object(forKey: playerKeyForDefaults) as? NSData {
let array = NSKeyedUnarchiver.unarchiveObject(with: decoded as Data) as! [Player]
_playerArray = array
}
}
