swift – Codable到CKRecord

概述我有几个可编码的结构,我想创建一个通用协议,将它们编码为CKRecord for CloudKit并进行解码. 我有一个Encodable的扩展来创建一个字典： extension Encodable { var dictionary: [String: Any] { return (try? JSONSerialization.jsonObject(with: JSON 我有几个可编码的结构,我想创建一个通用协议,将它们编码为CKRecord for CloudKit并进行解码.

我有一个encodable的扩展来创建一个字典：

extension encodable {    var dictionary: [String: Any] {        return (try? JsONSerialization.JsonObject(with: JsONEncoder().encode(self),options: .allowFragments)) as? [String: Any] ?? [:]    }}

然后在协议扩展中,我将记录创建为属性,如果类型为Data,我尝试创建CKAsset.

var ckEncoded: CKRecord? {    // Convert self.ID to CKRecord.name (CKRecordID)    guard let IDString = self.ID?.uuIDString else { return nil }    let record = CKRecord(recordtype: Self.entityType.rawValue,recordID: CKRecordID(recordname: IDString))    self.dictionary.forEach {        if let data = 
func decode(_ ckRecord: CKRecord) throws {    let keyIntersection = Set(self.dtoEncoded.dictionary.keys).intersection(ckRecord.allKeys())    var dictionary: [String: Any?] = [:]    keyIntersection.forEach {        if let asset = ckRecord[
/// Returns CKRecordfunc ckRecord() -> CKRecord {    let record = CKRecord(recordtype: "MyClasstype")    record["Title"] = Title as CKRecordValue    record["color"] = color as CKRecordValue    return record}init(withRecord record: CKRecord) {    Title = record["Title"] as? String ?? ""    color = record["color"] as? String ?? kDefaultcolor}
] as? CKAsset {            dictionary[] = try? self.data(from: asset)        } else {            dictionary[] = ckRecord[]        }    }    guard let data = try? JsONSerialization.data(withJsONObject: dictionary) else { throw Errors.LocalData.isCorrupted }    guard let dto = try? JsONDecoder().decode(self.DTO,from: data) else { throw  Errors.LocalData.isCorrupted }    do { try decode(dto) }    catch { throw error }}
.value as? Data {            if let asset: CKAsset = try? ckAsset(from: data,ID: IDString) { record[.key] = asset }        } else {            record[.key] = .value as? CKRecordValue        }    }    return record}

要解码：

除数据类型外,所有内容都可以正常工作.它无法从字典中识别出来.所以,我无法将其转换为CKAsset.先感谢您.

解决方法 我还发现到目前为止苹果还没有对此提供干净的支持.

我的解决方案是手动编码/解码：在我的Codable子类上,我添加了两个方法：

针对更复杂案例的另一个解决方案是使用一些第三方库,我遇到的是：https://github.com/insidegui/CloudKitCodable

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