Xcode Swift应用程序部署到iPhone损失CoreData iPhone重新启动后 [英] Xcode Swift application deployed to iphone losses CoreData after iPhone reboot

问题描述

我的简单Swift应用程序在CoreData中使用SQLite数据库来存储表视图数据。我通过模拟器将应用程序部署到我的iPhone。重新启动iPhone后，持久数据不再存在....但应用程序启动。我必须怎样做才能保持数据的持久性？
IOS9.2.1& Swift 2.0

My simple Swift application uses an SQLite DB in CoreData for table view data. I deployed the app to my iPhone via the simulator. After a reboot of the iPhone the persistent data was no longer present....but the application launches. What must I do to keep the data persistent? IOS9.2.1 & Swift 2.0

推荐答案

CoreData有趣的一点是它不是数据库。

One thing that's interesting about CoreData is that it isn't a database. It's a wrapper around a data store, in your case SQLite.

如果你不告诉CoreData保存它的内容，它将永远不会将更改写入数据存储

If you don't tell CoreData to save it's contents, it will never write the changes to disk.

在您的NSManagedObjectContext上调用 save ：）

Calling save on your NSManagedObjectContext will do the trick. :)

还有其他原因，它不会持久，但我会先检查这一点。

There are other reasons that it wouldn't persist, but I would check this first.

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