我有一个Person类,它是一个模型
import Foundation
public class Person : NSObject , NSCoding{
public var name:String="";
public var gender:Int = 0;
public var status:Int = 0
override init (){
super.init()
}
public init (name:String, gender:Int){
self.name=name;
self.gender=gender;
}
required public init(coder aDecoder: NSCoder) { }
public func encodeWithCoder(_aCoder: NSCoder) { }
}
现在,当我尝试检索[Person]数组时,我使用方法getPersons(arr : String!)
。如果NSUserDefaults中没有数据,我创建它,将1个元素放入其中并使用setPersons()
方法存储。
问题在于,在检索时我得到一个具有正确count(1)的数组,但该对象未填充,在String中为“”,在Int变量中为0。
private func archivePeople (people : [Person]) -> NSData{
return NSKeyedArchiver.archivedDataWithRootObject(people as NSArray)
}
public func getPersons(arr : String!) -> [Person]{
var array : [Person] = []
if let unarchivedObject = NSUserDefaults.standardUserDefaults().objectForKey(arr) as? NSData {
array = (NSKeyedUnarchiver.unarchiveObjectWithData(unarchivedObject) as? [Person])!
}
if array.count == 0 {
array.append(Person(name: A.DEFAULT_THEIR_NAMES,gender: 0))
setPersons(arr, people: array)
}
return array
}
public func setPersons(key: String, people : [Person]){
let archivedObject = archivePeople(people)
userDefaults.setObject(archivedObject, forKey: key)
userDefaults.synchronize()
}
有什么问题?我是否以错误的方式设置或检索此内容?
答案 0 :(得分:3)
您需要正确覆盖NSCoding
个功能。
它应该看起来像下面的代码:
required public convenience init(coder aDecoder: NSCoder) {
let name: String = aDecoder.decodeObject(forKey: "name") as! String
let gender = aDecoder.decodeInt64(forKey: "gender")
let status = aDecoder.decodeInt64(forKey: "status")
self.init(name: name, gender: Int(gender))
self.status = Int(status)
}
public func encodeWithCoder(_aCoder: NSCoder) {
_aCoder.encode(self.name, forKey: "name")
_aCoder.encode(Int64(self.gender), forKey: "gender")
_aCoder.encode(Int64(self.status), forKey: "status")
}