自定义 Class 取消存档在 Cocoa Swift 中为零
Custom Class Unarchive is nil in Cocoa Swift
我正在尝试在我的 macOS 应用程序中将自定义 class 保存和检索到 UserDefaults。 nil newData
class countClass: NSObject, NSCoding {
var leftClickCount : Int = 0
init(leftClickCount: Int) {
self.leftClickCount = leftClickCount
super.init()
}
func encode(with coder: NSCoder) {
coder.encode(self.leftClickCount, forKey: "leftClickCount")
}
required convenience init?(coder decoder: NSCoder) {
guard let leftClickCount = decoder.decodeObject(forKey: "leftClickCount") as? Int
else {
return nil
}
self.init(
leftClickCount: leftClickCount
)
}
}
class ViewController: NSViewController {
override func viewDidLoad() {
super.viewDidLoad()
let leftC = countClass(leftClickCount: 25)
let ud = UserDefaults.standard
let archivedData = NSKeyedArchiver.archivedData(withRootObject: leftC)
ud.set(archivedData, forKey: "data")
ud.synchronize()
let tempData = ud.object(forKey: "data") as! Data
let newData = NSKeyedUnarchiver.unarchiveObject(with: tempData) as! countClass // Getting nil here
}
}
我能够通过更改来解决此问题:
decoder.decodeObject(forKey: "leftClickCount") as? Int
与:
decoder.decodeInteger(forKey: "leftClickCount")
我正在尝试在我的 macOS 应用程序中将自定义 class 保存和检索到 UserDefaults。 nil newData
class countClass: NSObject, NSCoding {
var leftClickCount : Int = 0
init(leftClickCount: Int) {
self.leftClickCount = leftClickCount
super.init()
}
func encode(with coder: NSCoder) {
coder.encode(self.leftClickCount, forKey: "leftClickCount")
}
required convenience init?(coder decoder: NSCoder) {
guard let leftClickCount = decoder.decodeObject(forKey: "leftClickCount") as? Int
else {
return nil
}
self.init(
leftClickCount: leftClickCount
)
}
}
class ViewController: NSViewController {
override func viewDidLoad() {
super.viewDidLoad()
let leftC = countClass(leftClickCount: 25)
let ud = UserDefaults.standard
let archivedData = NSKeyedArchiver.archivedData(withRootObject: leftC)
ud.set(archivedData, forKey: "data")
ud.synchronize()
let tempData = ud.object(forKey: "data") as! Data
let newData = NSKeyedUnarchiver.unarchiveObject(with: tempData) as! countClass // Getting nil here
}
}
我能够通过更改来解决此问题:
decoder.decodeObject(forKey: "leftClickCount") as? Int
与:
decoder.decodeInteger(forKey: "leftClickCount")