[英]Type 'Model' does not conform to protocol 'Decodable'/Encodable
I can't figure out how I can fix this error.我不知道如何解决这个错误。
If I remove @Published, it compiles everything correct but then I can't see the data in a cell in real time.如果我删除@Published,它会正确编译所有内容,但我无法实时查看单元格中的数据。 Reading I saw that I need the var with
@Published
阅读我看到我需要带有
@Published
的var
import SwiftUI
import Combine
class TimeModel: Codable, Identifiable, ObservableObject {
@Published var id: UUID = UUID()
@Published var nome : String
@Published var time : String
func aggiornaUI() {
DispatchQueue.main.async {
self.objectWillChange.send()
}
}
init(nome: String, time: String) {
self.nome = nome
self.time = time
}
}
Update: ok thanks I check now but the error remain更新:好的,谢谢我现在检查,但错误仍然存在
HStack {
Text("\(timeString(from: Int(TimeInterval(remainingSeconds))))")
.onReceive(timer) { _ in
if isCounting && remainingSeconds > 0 {
remainingSeconds -= 1
}
}
error:错误:
Instance method 'onReceive(_:perform:)' requires that 'TimeModel' conform to 'Publisher'
实例方法 'onReceive(_:perform:)' 要求 'TimeModel' 符合 'Publisher'
A @Published
property with type, let's say, String
, are of type Published<String>
.具有类型的
@Published
属性,比如String
,属于Published<String>
类型。 And apparently, that type is not Codable
.显然,这种类型不是
Codable
。
You can solve this by writing custom encode and decode functions.您可以通过编写自定义编码和解码函数来解决这个问题。 That's not difficult;
这并不难; it's only some extra lines of code.
它只是一些额外的代码行。 Please see the documentation on
Codable
for some examples.有关示例,请参阅
Codable
上的文档。
Here is an example for your case:这是您的案例的示例:
class TimeModel: Codable, Identifiable, ObservableObject {
@Published var id: UUID = UUID()
@Published var nome : String
@Published var time : String
func aggiornaUI() {
DispatchQueue.main.async {
self.objectWillChange.send()
}
}
init(nome: String, time: String) {
self.nome = nome
self.time = time
}
enum CodingKeys: String, CodingKey {
case id
case nome
case time
}
func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(id, forKey: .id)
try container.encode(nome, forKey: .nome)
try container.encode(time, forKey: .time)
}
required init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
id = try container.decode(UUID.self, forKey: .id)
nome = try container.decode(String.self, forKey: .nome)
time = try container.decode(String.self, forKey: .time)
}
}
This should work, but I can't really test it because I don't know the rest of your code.这应该可行,但我无法真正测试它,因为我不知道您的代码的 rest。
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