swift - CKQuery 比较日期返回空数组

Question

我试图通过比较两个日期字段来查询 CloudKit 私有数据库。

 let predicate = NSPredicate(format: "timeStamp == %@", parcoursTimeStamp as CVarArg)
            let query = CKQuery(recordType: "ParcoursRecord", predicate: predicate)
            privateDatabase.perform(query, inZoneWith: recordZone.zoneID, completionHandler: { (result, error) in
                if let error = error {
                    print("Error querying for record: \(error.localizedDescription)")
                } else {
                    print("Query result: \(result)")
                }

        })

我只收到 Query result: Optional([ ]) 但从未收到任何结果，尽管我知道我正在比较的时间戳是相同的。我究竟做错了什么？谓词是否定义不正确（我猜是这样）？

Answer 1

假设您timestamp的 CKRecord 类型已定义为NSDate...

let predicate = NSPredicate(format: "timeStamp ==  %@", parcoursTimeStamp  as NSDate)