核心数据插入块UI

Question

我正在运行一个URLSession数据任务来异步下载一些数据 - 然后将其插入到核心数据（可以是大约2000个项目）。将数据保存到数据库会冻结UI。在此看到其他帖子。我错过了什么？

 self?.api.getData(param1, param2: id,  success: { (data) -> Void in
         let myData = JSON(data!)["Data"]
         self?.insertDataToDb(myData){result in ...

...

    func insertDataToDb(_ data: JSON, success: @escaping SuccessClosure, failure: @escaping FailureClosure){

            let privateMOC = NSManagedObjectContext(concurrencyType: .privateQueueConcurrencyType)
            privateMOC.parent = context
            privateMOC.perform {
                self.insertJSONdata(data[Keys.FirstData])
                do {
                    try privateMOC.save()
                    self.context.performAndWait {
                        do {
                            try self.context.save()
                            success()
                        } catch let error as NSError {
                            failure(error)
                        }
                    }
                } catch let error as NSError {
                    failure(error)
                }
            }
        }

Answer 1

更新主线程中的UI

DispatchQueue.main.async {
        self.updateUI()
    }