ios - 如何使用查询在 swift 中获取 cloudkit 数据

Question

我试图将所有用户的位置存储在 cloudkit 中，然后由每台设备下载。我在 storeLocation 中的代码上标记了错误:

"Cannot convert value of type '(NSError?, [CKRecord]?)' (aka '(Optional, Optional>)') to expected argument type '(error: NSError?, records: [CKRecord]?) -> Void'"

//saves location in cloud kit //currently works well:

var locArray = [CKRecord]()
func storeLocation(location:CLLocation) {
        let locationRecord = CKRecord(recordType: "location")
        locationRecord.setObject(location, forKey: "location")
        let publicData = CKContainer.defaultContainer().publicCloudDatabase
        publicData.saveRecord(locationRecord) { (records, error) in
            if error != nil {
                print("error saving locations: \(error)")
            } else {
                print("Locations saved: \(records)")
                loadLocation((error, self.locArray)) //where I get error******
            }
        }
    }

//fetches location from cloud kit:

func loadLocation(completion: (error:NSError?, records:[CKRecord]?) -> Void)
{
    let query = CKQuery(recordType: "Location", predicate: NSPredicate(value: true))
    CKContainer.defaultContainer().publicCloudDatabase.performQuery(query, inZoneWithID: nil){
        (records, error) in
        if error != nil {
            print("error fetching locations")
            completion(error: error, records: nil)
        } else {
            print("found locations: \(records)")
            completion(error: nil, records: records)
        }
    }
}

Answer 1

我相信而不是:

loadLocation((error, self.locArray))

你需要这样调用:

loadLocation() { (error, records) in
    // do something here with the returned data.
}