Swift3里CloudKit的使用

CloudKit的使用
Retrieve existing records

let predicate = NSPredicate(value: true)
let query = CKQuery(recordType: recordType, predicate: predicate)
CKContainer.default().publicCloudDatabase.perform(query, inZoneWith: nil) { records, error in

}

Create a new record

let record = CKRecord(recordType: "RecordType")
record.setValue("Some data", forKey: "key")
CKContainer.default().publicCloudDatabase.save(record) { savedRecord, error in

}

Update the record

let recordId = CKRecordID(recordName: "RecordType")
CKContainer.default().publicCloudDatabase.fetch(withRecordID: recordId) { updatedRecord, error in  
    if error != nil {
        return
    }

    updatedRecord.setObject("Some data", forKey: "key")
    CKContainer.default().publicCloudDatabase.save(updatedRecord) { savedRecord, error in

    }
}

Remove the record

let recordId = CKRecordID(recordName: recordId)
CKContainer.default().publicCloudDatabase.delete(withRecordID: recordId) { deletedRecordId, error in

}