parse-platform - 从 Parse.com 检索数组

Question

我正在尝试从 Back4Apps.com（Parse.com 等效）下载一个数组。下面显示没有错误，但是当它到达“downloadQuery.findObjectsInBackground { (objects, error) in”行时，它只是跳过其余代码到函数末尾。

• 我已经测试了“用户名”，它似乎是正确的。
• 我确定类和子类名称是正确的。
• 解析参数是正确的，我已经有许多其他解析函数在工作。

有什么建议去哪里看吗？

var userCommonNameArray = [String]()
var userCommonNameESArray = [String]()
var userCommonNameFRArray = [String]()
var userCommonNameDEArray = [String]()
var speciesNameArray = [String]()
var userNotesArray = [String]()


    func insertFromParse () {

        let username = userDefault.value(forKey: "username") as! String

        let downloadQuery = PFQuery(className:"ReefLifeApps")
        downloadQuery.whereKey("username", equalTo: username)



//    This is there Xcode skips from to the end
//    tried variations of the below line.  Neither worked.            
//      downloadQuery.findObjectsInBackground {(objects, error) -> Void in
        downloadQuery.findObjectsInBackground { (objects, error) in

            if error == nil {
                // Do something with the found objects
                for object in objects! {

                    self.userCommonNameArray.append(object.object(forKey: "userCommonName") as! String)
                    self.userCommonNameESArray.append(object.object(forKey: "userCommonNameES") as! String)
                    self.userCommonNameFRArray.append(object.object(forKey: "userCommonNameFR") as! String)
                    self.userCommonNameDEArray.append(object.object(forKey: "userCommonNameDE") as! String)
                    self.speciesNameArray.append(object.object(forKey: "speciesName") as! String)
                    self.userNotesArray.append(object.object(forKey: "userNotes") as! String)

                }
            } else {

                print("Error: \(error!)")
            }
        }
}