ios – 无法将NSUserDefaults中的数据检索到今天的扩展名(Swift)

我有一组数组,它​​们都包含我创建的自定义Task对象的许多实例.我将数组保存到NSUserDefaults,如下所示：

自定义任务对象

class Task:NSObject, NSCoding {
    var name:String
    var notes:String
    var date:NSDate
    var dateUse:Bool
    var taskCompleted:Bool

    init(name:String, notes:String, date:NSDate, dateUse:Bool, taskCompleted:Bool){
        self.name = name
        self.notes = notes
        self.date = date
        self.dateUse = dateUse
        self.taskCompleted = taskCompleted
    }

    required init(coder decoder: NSCoder){
        self.name = decoder.decodeObjectForKey("name") as! String
        self.notes = decoder.decodeObjectForKey("notes") as! String
        self.date = decoder.decodeObjectForKey("date") as! NSDate
        self.dateUse = decoder.decodeObjectForKey("dateUse") as! Bool
        self.taskCompleted = decoder.decodeObjectForKey("taskCompleted") as! Bool
    }

    func encodeWithCoder(coder: NSCoder) {
        coder.encodeObject(self.name, forKey: "name")
        coder.encodeObject(self.notes, forKey: "notes")
        coder.encodeObject(self.date, forKey: "date")
        coder.encodeObject(self.dateUse, forKey: "dateUse")
        coder.encodeObject(self.taskCompleted, forKey: "taskCompleted")
    }
}

保存：

let defaults = NSUserDefaults(suiteName: "group.com.myGroupName")

let nowData = NSKeyedArchiver.archivedDataWithRootObject(nowTasks)
defaults!.setObject(nowData, forKey: "nowData")

检索

let nowDataPull = defaults!.objectForKey("nowData") as? NSData
if let nowDataPull2 = nowDataPull{
   let nowTasks2 = NSKeyedUnarchiver.unarchiveObjectWithData(nowDataPull2) as? [Task]
   if let nowTasks21 = nowTasks2{
      nowTasks = nowTasks21
   }
}

上述方法适用于从iPhone本身设置和检索数据.但是,尝试通过今日扩展程序检索数据时,此方法不起作用.

当尝试从今天的扩展名的.swift文件中检索时,我收到以下错误：

• Failed to inherit CoreMedia permissions from 52550: (null)

• Terminating app due to uncaught exception ‘NSInvalidUnarchiveOperationException’, reason: ‘* -[NSKeyedUnarchiver
  decodeObjectForKey:]: cannot decode object of class (MyAppName.Task)
  for key (NS.objects); the class may be defined in source code or a
  library that is not linked’

我知道扩展可以读取数据,因为我打电话时：

if (defaults?.objectForKey("nowData") != nil){
   print("there is data")
}

我得到了打印的回复..

我可以成功保存一个Integer并通过今天的扩展名检索,但不能通过objectForKey检索

我尝试了各种其他保存方法,包括.plist文件,但似乎没有任何工作.同样的错误不断发生.任何投入将不胜感激！

另一种方法是修复用于NSCoding的类的名称.你只需要使用：

>序列化之前的NSKeyedArchiver.setClassName(“Task”,forClass：Task.self
>反序列化之前的NSKeyedUnarchiver.setClass(Task.self,forClassName：“Task”)

在需要的地方.

看起来iOS扩展名在类名前面加上扩展名.