将自定义对象附加到 NSArray 时出错

Question

我创建了一个自定义对象。我已经使用 NSCoder 将自定义对象保存到 nsuserdefaults。我向该对象添加了一个 NSArray，并试图将另一个自定义对象附加到该数组。我在尝试这样做时不断收到此错误："Value of type NSArray has no member append"。我怎样才能防止这个错误并能够使用这个自定义对象数组将我的自定义对象保存到 nsuserdefaults。

这是习俗 class：

class Person: NSObject, NSCoding {
var name: String!
var age: Int!
var image: UIImage!
var arr: NSArray!
required convenience init(coder decoder: NSCoder) {
    self.init()
    self.name = decoder.decodeObjectForKey("name") as! String
    self.age = decoder.decodeObjectForKey("age") as! Int
    self.image = decoder.decodeObjectForKey("image") as! UIImage
    self.image = decoder.decodeObjectForKey("image") as! UIImage    }
convenience init(name: String, age: Int, img: UIImage, array: NSArray) {
    self.init()
    self.name = name
    self.age = age
    self.image = img
    self.arr = array

}
func encodeWithCoder(coder: NSCoder) {
        if let name = name { coder.encodeObject(name, forKey: "name") }
        if let age = age { coder.encodeObject(age, forKey: "age") }
        if let img = image {coder.encodeObject(image, forKey: "image") }
        if let arr = arr {coder.encodeObject(arr, forKey: "array") }
    }
}

这里是保存和附加代码：

import UIKit
import Foundation
var newPerson = Person()
var oldPerson = Person(name: "John", age: 100, img: newPerson.image, array: [1, 2, 3, 4])
class ViewController: UIViewController {


@IBOutlet var image: UIImageView!
@IBOutlet var textField: UITextField!

@IBAction func Save(sender: AnyObject) {


    newPerson.name = textField.text
    newPerson.age = 10
    newPerson.image = UIImage(named: "afghan_flag.jpg")
    newPerson.arr.append(oldPerson)
    let personData = NSKeyedArchiver.archivedDataWithRootObject(newPerson)
    NSUserDefaults().setObject(personData, forKey: "personData")

}


@IBAction func Load(sender: AnyObject) {


    if let loadedData = NSUserDefaults().dataForKey("personData") {

        if let loadedPerson = NSKeyedUnarchiver.unarchiveObjectWithData(loadedData) as? Person {
            print(loadedPerson.name)

        }
    }strong text


   }
}

Answer 1

如果你这样定义，你可以有一个 Person 数组

var arrayPerson : [Person] = []

那么你可以使用 arrrayPerson.append(newPerson)

将自定义对象附加到 NSArray 时出错

Error with appending custom object to NSArray

nsuserdefaults

nsarray

ios

swift