swift - CloudKit - CKRecord.ID 可接受的记录名称？

Question

我已经编写了一种在自定义区域中保存记录的方法，它似乎按预期工作。但是，我不确定的一件事是 CKRecord.ID recordName。现在我只使用 UUID 字符串。是否有分配 recordName 的首选方法？当前的 CloudKit 示例非常稀少，而且 CK 文档的相当一部分似乎已经过时。谢谢。

func saveToCloud(record: String, recordType: String, recordTypeField: String, reference: CKRecord?, referenceType: String?) {

    let zoneID = CKRecordZone.ID(zoneName: Zone.test, ownerName: CKRecordZone.ID.default.ownerName)
    let recordID = CKRecord.ID(recordName: UUID().uuidString, zoneID: zoneID)
    let newRecord = CKRecord(recordType: recordType, recordID: recordID)

    if let reference = reference, let referenceType = referenceType {
        let newReference = CKRecord.Reference(record: reference, action: .none)
        newRecord[referenceType] = newReference
    }
    newRecord[recordTypeField] = record
    database.save(newRecord) { (_,error) in
        if let err = error as? CKError {
            print("ERROR =" , err.userInfo )
        }
    }
}

Answer 1

我同意 UUID 是理想的。示例:

let newId = CKRecord.ID(recordName: UUID().uuidString)

但是，重要的是不要尝试使用无效字符或零长度字符串创建一个。结果是 fatal error !因此，当从不受信任的来源加载它们时(比如从服务器输出解析)，我使用如下安全功能:

extension CKRecord.ID {     
    public static func fromUntrusted(_ string: String?) -> CKRecord.ID? {
        guard let string = string else { return nil }
        guard let _ = string.data(using: .ascii, allowLossyConversion: false) else { return nil }
        guard string.count > 0 && string.count < 255 else { return nil }
        return CKRecord.ID(recordName: string)
    }
}

用法:

if let recordId = CKRecord.ID.fromUntrusted(response) {
    // use value
}