检查Cocoa中Caps Lock的状态 [英] Checking state of Caps Lock in Cocoa

问题描述

好的。我开始我的第一个OS X应用程序。

OK. I'm starting my first OS X application. Instead of doing something obvious or simple, I'm going straight to the system stuff.

我想在菜单栏中放置大写锁定指示符，而不是执行明显或简单的操作。在C＃或Delphi（我的主要语言），这是相当微不足道。在Mac OS X中，我不知道从哪里开始。当然，我已经下载Xcode并写了几个没什么风格的应用程序。现在我需要写一个应用程序，它将在开始运行，只有一个菜单栏组件，并工作。

I would like to place a caps lock indicator in the menu bar. In C# or Delphi (my primary languages) this is fairly trivial. In Mac OS X, I'm not really sure where to start. Of course I've downloaded Xcode and written a few little nothing style apps. Now I need to write an app that will run on start, only have a menu bar component, and work.

有我的背景。如何获取Cocoa中的caps lock键的状态？

There's my background. How can I get the state of the caps lock key in Cocoa?

推荐答案

开始运行：直到用户。如果他们希望它在开始运行，它们将把它放在登录项中。您可以添加一个按钮将其自动添加到登录项目;使用启动服务的共享文件列表API将其添加到会话登录项目列表。

Run on start: Up to the user. They will put it in Login Items if they want it to run on start. You can add a button to add it to Login Items automatically; use Launch Services' Shared File List API to add it to the Session Login Items list.

菜单栏项目：这被称为状态项。请参阅NSStatusItem。

Menu bar item: This is called a status item. See NSStatusItem.

检查大写锁定：首先，可能有多个键盘，其中大多数都有大写锁定，而不是所有键盘都具有相同大写锁定状态（用户可能有一个带有它，一个带有它关闭，第三个没有大写锁定键）。

Checking for caps lock: First off, there may be multiple keyboards, most of which will have a caps lock, and not all of which will have the same caps lock state (the user may have one with it on, one with it off, and a third with no caps lock key at all). Pay attention to each keyboard's caps lock state separately, and light up your indicator if any caps lock key is on.

要读取和监视大写锁定键，您将会看到每个键盘的大写锁定键，需要浸入I / O Kit。我相信您需要使用 HID Manager 。这是一个C API，但Dave Dribin已撰写 Objective- C封装器，用于其较低级别的前辈（最近在 1.0.1 ）。

To read and monitor the caps lock keys, you'll need to dip into I/O Kit. I believe you'll need to use the HID Manager. That's a C API, but Dave Dribin has written an Objective-C wrapper for its lower-level predecessor (most recently at 1.0.1).

编辑添加：您可以使用Quartz事件敲击监视大写锁定，但不是每键盘，我不确定你会得到多个键盘的可靠结果，它仍然不会让你读取大写锁定键的初始状态，当你的应用程序启动。

Edited to add: You can monitor caps lock using a Quartz event tap, but it's not per-keyboard, so I'm not sure you'll get reliable results with multiple keyboards, and it still won't let you read the initial state of the caps lock keys when your app launches.

这篇关于检查Cocoa中Caps Lock的状态的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！