检测用户何时拍摄屏幕截图 [英] Detect when a User takes a Screenshot

问题描述

我正在寻找一种方法，当用户使用Command-Shift-3或Command-Shift-4进行屏幕截图时，我的应用程序会收到通知.

I am looking for way for my app to receive a notification when the user takes a screenshot either with Command-Shift-3 or Command-Shift-4.

例如Droplr和Cloud App之类的应用程序会自动上传所拍摄的屏幕截图.

An example of this are apps like Droplr and Cloud App which automatically upload the screenshot taken.

我一直在搜索，发现它可能与达尔文通知"有关，但是我不确定从哪里开始.

I have been searching around and found out that it may have something to do with Darwin Notifications but I am unsure as to where to start.

推荐答案

在前面的注释之一中提到了此问题，但是您可以使用NSMetadataQuery在kMDItemIsScreenCapture = 1中搜索文件.这是一个特殊属性，已添加到屏幕截图文件中.

This was mentioned in one of the earlier comments, but you can use an NSMetadataQuery searching for files where kMDItemIsScreenCapture = 1. This is a special attribute that gets added to screenshot files.

我刚刚整理了一个演示如何执行此操作的演示并将其发布在github上:

I just whipped up a little demo showing how to do this and posted it on github:

https://github.com/davedelong/Demos/blob/master/ScreenShot％20Detector

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