Question

我创建了一个自定义对象。我已使用NSCoder将自定义对象保存到nsuserdefaults。我向对象添加了一个NSArray，我试图将另一个自定义对象附加到此数组。尝试这样做时，我不断收到此错误：“NSArray类型的值没有成员附加”。如何防止此错误，并能够使用此自定义对象数组将自定义对象保存到nsuserdefaults。

这是自定义类：

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

如果你像这样定义它，你可以拥有一个Person数组

var arrayPerson : [Person] = []

然后你可以使用arrrayPerson.append（newPerson）

将自定义对象附加到NSArray时出错

1 个答案: