UIActivityViewController UIActivityViewControllerCompletionWithItemsHandler [英] UIActivityViewController UIActivityViewControllerCompletionWithItemsHandler

问题描述

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使用Swift作为在iOS 8中运行的应用程序，我需要编写 UIActivityViewController 的完成处理程序，用于捕获用户选择的共享方法的结果。

Using Swift for an app that runs in iOS 8, I need to write a completion handler for the UIActivityViewController to capture the results of which "share" method a user selected.

这是到目前为止我的代码片段。我的问题是如何设置 avc.completionWithItemsHandler ？我确定它很简单，但我没有看到它。

This is a snippet of the code I have so far. My question is how to I set the avc.completionWithItemsHandler? I'm sure it's simple, but I don't see it.

var activityItems = NSMutableArray()
activityItems.addObject("Email or text for 'share' goes here")

var avc = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)
avc.setValue("Subject for Email", forKey: "Subject")

avc.completionWithItemsHandler = //Here is where I dont know what to do.

self.navigationController?.presentViewController(avc, animated: true, completion: nil)

推荐答案

completionWithItemsHandler typealias：

The completionWithItemsHandler typealias:

typealias UIActivityViewControllerCompletionWithItemsHandler = (String?, Bool, [AnyObject]?, NSError?) -> Void

注意：以前的代码块不会在你的项目中使用，它只显示类型需要关闭（文档）。

Note: the previous code block is not to be used in your project, it just shows the type of closure needed (docs).

所以这些是传递给完成处理程序的参数，你可以这样做，所以完成处理程序看起来像这样：

So those are the parameters that are passed into the completion handler for you to do with as you will, so the completion handler would look like this:

avc.completionWithItemsHandler = { activity, success, items, error in 

}

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