Swift 3 NSCoder 无法识别的选择器发送到实例

Question

我正在尝试将自定义类的列表保存为用户默认值，但在保存时不断收到"无法识别的选择器发送到实例"错误。从用户默认值获取数组时我没有问题。

这是我用来保存为用户默认值的代码。

let userDefaults = UserDefaults.standard
userDefaults.set(NSKeyedArchiver.archivedData(withRootObject: visitors), forKey: "signedInUsers")
userDefaults.synchronize()

访问者是访问者对象的数组。

这是我的访客课程。

class Visitor: NSObject {
var name: String = ""
var contactEmail: String = ""
var company: String = ""
var picture: UIImage = UIImage()
var signature: UIImage = UIImage()
var timeIn: String = ""
var timeOut: String = ""
var signedOut: Bool = false
var otherQuestionsWithAnswers: [String] = []
// MARK: NSCoding
override init() {
super.init()
}
init(name: String, contactEmail: String, company: String, picture: UIImage, signature: UIImage,timeIn: String,timeOut: String,signedOut: Bool,otherQuestionsWithAnswers: [String]) {
self.name = name
self.contactEmail = contactEmail
self.company = company
self.picture = picture
self.signature = signature
self.timeIn = timeIn
self.timeOut = timeOut
self.signedOut = signedOut
self.otherQuestionsWithAnswers = otherQuestionsWithAnswers
}
required convenience init?(coder decoder: NSCoder) {
guard let name = decoder.decodeObject(forKey: "name") as? String,
let contactEmail = decoder.decodeObject(forKey: "contactEmail") as? String,
let company = decoder.decodeObject(forKey: "company") as? String,
let timeOut = decoder.decodeObject(forKey: "timeOut") as? String,
let timeIn = decoder.decodeObject(forKey: "timeIn") as? String,
let picture = decoder.decodeObject(forKey: "picture") as? UIImage,
let signature = decoder.decodeObject(forKey: "signature") as? UIImage,
let otherQuestionsWithAnswers = decoder.decodeObject(forKey: "otherQuestionsWithAnswers") as? [String],
let signedOut = decoder.decodeObject(forKey: "signedOut") as? Bool
else { return nil }
self.init(
name: name,
contactEmail: contactEmail,
company: company,
picture: picture,
signature: signature,
timeIn: timeIn,
timeOut: timeOut,
signedOut: signedOut,
otherQuestionsWithAnswers: otherQuestionsWithAnswers
)
}
func encodeWithCoder(coder: NSCoder) {
coder.encode(name, forKey: "name")
coder.encode(contactEmail, forKey: "contactEmail")
coder.encode(company, forKey: "company")
coder.encode(picture, forKey: "picture")
coder.encode(signature, forKey: "signature")
coder.encode(timeIn, forKey: "timeIn")
coder.encode(timeOut, forKey: "timeOut")
coder.encode(signedOut, forKey: "signedOut")
coder.encode(otherQuestionsWithAnswers, forKey: "otherQuestionsWithAnswers")
}
}

感谢帮助，不胜感激。

编辑：

将类更改为此修复了它。

import Foundation
import UIKit
// a question that the user has to answer
class Visitor: NSObject, NSCoding {
var name: String = ""
var contactEmail: String = ""
var company: String = ""
var picture: UIImage = UIImage()
var signature: UIImage = UIImage()
var timeIn: String = ""
var timeOut: String = ""
var signedOut: Bool = false
var otherQuestionsWithAnswers: [String] = []
// MARK: NSCoding
override init() {
super.init()
}
init(name: String, contactEmail: String, company: String, picture: UIImage, signature: UIImage,timeIn: String,timeOut: String,signedOut: Bool,otherQuestionsWithAnswers: [String]) {
self.name = name
self.contactEmail = contactEmail
self.company = company
self.picture = picture
self.signature = signature
self.timeIn = timeIn
self.timeOut = timeOut
self.signedOut = signedOut
self.otherQuestionsWithAnswers = otherQuestionsWithAnswers
}
required init(coder decoder: NSCoder) {
name = decoder.decodeObject(forKey: "name") as! String
contactEmail = decoder.decodeObject(forKey: "contactEmail") as! String
company = decoder.decodeObject(forKey: "company") as! String
timeOut = decoder.decodeObject(forKey: "timeOut") as! String
timeIn = decoder.decodeObject(forKey: "timeIn") as! String
if let pictureTest = decoder.decodeObject(forKey: "picture") as? UIImage {
picture = pictureTest
} else {
picture = UIImage()
}
if let sigTest = decoder.decodeObject(forKey: "picture") as? UIImage {
signature = sigTest
} else {
signature = UIImage()
}
otherQuestionsWithAnswers = decoder.decodeObject(forKey: "otherQuestionsWithAnswers") as! [String]
signedOut = decoder.decodeBool(forKey: "signedOut")
}
public func encode(with aCoder: NSCoder) {
aCoder.encode(name, forKey: "name")
aCoder.encode(contactEmail, forKey: "contactEmail")
aCoder.encode(company, forKey: "company")
aCoder.encode(picture, forKey: "picture")
aCoder.encode(signature, forKey: "signature")
aCoder.encode(timeIn, forKey: "timeIn")
aCoder.encode(timeOut, forKey: "timeOut")
aCoder.encode(signedOut, forKey: "signedOut")
aCoder.encode(otherQuestionsWithAnswers, forKey: "otherQuestionsWithAnswers")
}
}

Answer 1

您用于编码的函数不正确，必须func encode(with aCoder: NSCoder){}而不是func encodeWithCoder(coder: NSCoder) {}因此请更改它并按预期工作

public func encode(with aCoder: NSCoder) {
aCoder.encode(name, forKey: "name")
aCoder.encode(contactEmail, forKey: "contactEmail")
aCoder.encode(company, forKey: "company")
aCoder.encode(picture, forKey: "picture")
aCoder.encode(signature, forKey: "signature")
aCoder.encode(timeIn, forKey: "timeIn")
aCoder.encode(timeOut, forKey: "timeOut")
aCoder.encode(signedOut, forKey: "signedOut")
aCoder.encode(otherQuestionsWithAnswers, forKey: "otherQuestionsWithAnswers")
}

希望这有帮助

Answer 2

您的访问者类应首先继承自 NSObject，然后继承 NSCoding。如果没有 NSCoding，则无法对自定义类进行编码和解码。这是我最近在项目中犯的一个错误，您的编码函数签名不正确。我相信这会解决这个问题。以下是更正后的代码：

斯威夫特3版本：-

class Visitor: NSObject, NSCoding {
var name: String = ""
var contactEmail: String = ""
var company: String = ""
var picture: UIImage = UIImage()
var signature: UIImage = UIImage()
var timeIn: String = ""
var timeOut: String = ""
var signedOut: Bool = false
var otherQuestionsWithAnswers: [String] = []
func encode(with aCoder: NSCoder) {
//... encode here
}