快速从CloudKit删除数据 [英] Deleting data from cloudkit with swift

问题描述

如何删除一些放入云中的数据？我制作了一个应用程序，当您在1个视图控制器中输入URL时，它会上传到云中；当您转到另一个视图控制器时，它将显示您从Web视图中的云中输入的URL。例如，当您输入www.hello.com时，它将进入云端，而当您使用其他视图控制器的webview时，它将加载www.hello.com。

How do I delete some data I put into the cloud? I made an app that when you enter a url in 1 view controller it uploads into the cloud, and when you go to another view controller it shows the url you entered before from the cloud in a webview. for example, when you enter www.hello.com, it goes into the cloud, and when you go to the webview on a different view controller it loads www.hello.com.

我的问题：

当我输入第二个URL时，它仍然会加载第一个。如何加载我上传的最新影片？

When I enter a second url, it still loads the first one. How do I get it to load the latest one I uploaded? Is there a way to delete the first one when the second one is uploaded?

推荐答案

您可以使用以下代码删除记录：

You can delete records with code like this:

database.deleteRecordWithID(CKRecordID(recordName: recordId), completionHandler: {recordID, error in 
 NSLog("OK or \(error)")
}

其中数据库是您所使用的CKDatabase

where database is the CKDatabase that you are using.

但是在您的情况下，更新以前创建的记录可能会更好。另一种解决方案是在creationDate上使用排序顺序时查询数据这个：

But in your situation it might be better to update the previous created record. An other solution would be to query your data while using a sort order on the creationDate like this:

query.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]

然后选择第一个，因为这是您保存的最后一个。一个不错的选择是，您将在数据库中拥有一个历史记录

Then just pick the first one since that's the last one you saved. A nice extra is that you would have a history in your database.

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