保存上下文中的核心数据编码崩溃
保存上下文中的核心数据编码崩溃
提问于 2020-05-11 01:03:24
在保存自定义托管对象的上下文时，我得到了以下错误：
2020-05-10 20:43:40.432001-0400 Timecard[26285:12499267] [error] error: SQLCore dispatchRequest: exception handling request: <NSSQLSaveChangesRequestContext: 0x280c206c0> ,
-[Timecard.Day encodeWithCoder:]: unrecognized selector sent to instance 0x281a0c460 with userInfo of (null)我使用NSManagedObject的自定义子类来表示"Week“实体。Week实体中充满了Day对象，根据错误，这些对象似乎是问题所在：
import Foundation
public class Day: NSObject, ObservableObject, Codable {
var name: String
@Published var date: Date
@Published var jobs: [Job] = []
var totalHours: Double {
get {
var totalHours = 0.0
for job in jobs {
totalHours = totalHours + job.totalHours
}
return totalHours
}
}
var totalDollars: Double {
get {
var totalDollars = 0.0
for job in jobs {
totalDollars = totalDollars + job.totalDollars
}
return totalDollars
}
}
init(name: String, date: Date) {
self.name = name
self.date = date
}
init(name: String) {
self.name = name
self.date = Date()
}
func add(job: Job) {
jobs.append(job)
}
// Mark: - Codable Encoding & Decoding
enum CodingKeys: String, CodingKey {
case date
case jobs
case name
}
required public init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
name = try container.decode(String.self, forKey: .name)
date = try container.decode(Date.self, forKey: .date)
jobs = try container.decode([Job].self, forKey: .jobs)
}
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(name, forKey: .name)
try container.encode(date, forKey: .date)
try container.encode(jobs, forKey: .jobs)
}
}周->日->作业都符合可编码的，并且在保存到Plist时可以工作。只有当我试图保存上下文时，它才会崩溃。
Stack Overflow用户
发布于 2020-05-11 04:03:44
这是一个NSObject，你必须使它符合NSCoding协议。
public protocol NSCoding {
func encode(with coder: NSCoder)
init?(coder: NSCoder) // NS_DESIGNATED_INITIALIZER
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/61720730
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