主机应用程序在哪里处理NSExtensionContext#completeRequest? [英] Where does a host app handle NSExtensionContext#completeRequest?

问题描述

当您从分机呼叫completeRequest(returningItems:completionHandler:)时，主机应用程序在哪里处理?

When you call completeRequest(returningItems:completionHandler:) from an extension, where does this get handled by the host app?

推荐答案

免责声明:没有检查我的假设，但这可能会有所帮助.

Disclaimer: did not checked my assumptions, but may be this helps.

1)文档指出:

调用completeRequestReturningItems:completionHandler:方法， 通知主机应用其原始请求已完成

Call the completeRequestReturningItems:completionHandler: method, which signals the host app that its original request is complete

2)此处-图2-3显示了"Host" -app-是使用扩展名开始工作的应用程序.例如，主机"可以是用户触摸共享"按钮的应用程序.然后，此主机"应用将一些数据(用户要共享)发送给扩展程序.

2) here - Figure 2-3 shows that "Host"-app - is app that starts some work with extension. For example, "Host" may be the app in which user touches "Share"-button. Then this "Host"-app sends some data (which user wants to share) to extension.

3)我认为，共享数据"扩展是非常常见的扩展示例.很有可能UIActivityViewController中的某处必须是实现您正在寻找的completeRequest(returningItems:completionHandler:)以及从扩展名调用的completeRequest(returningItems:completionHandler:)的方式. 这就是我发现的:

3) "Sharing data"-extension, I think, very common example of extension. So very probable that somewhere in UIActivityViewController must be way to realise completeRequest(returningItems:completionHandler:) that you looking for and that called from extension. And this is what I found:

@property(nullable, nonatomic, copy) UIActivityViewControllerCompletionWithItemsHandler completionWithItemsHandler NS_AVAILABLE_IOS(8_0); // set to nil after call

文档关于此属性的说法:

活动完成或活动视图控制器被解雇后，将执行视图控制器的完成块.

Upon the completion of an activity, or the dismissal of the activity view controller, the view controller’s completion block is executed.

和:

returnedItems- 包含任何已修改数据的NSExtensionItem对象的数组.使用此数组中的项目可获取扩展名对原始数据所做的任何更改

returnedItems - An array of NSExtensionItem objects containing any modified data. Use the items in this array to get any changes made to the original data by an extension

再次，我没有测试.但是此属性看起来就像您要查找的处理程序.

Again, I did not test it. But this property looks like handler you looks for.

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