注册全局热键，不支持启用的辅助设备 [英] Register a global hotkey without support for assistive devices enabled

问题描述

使用此代码，我可以注册一个全局事件处理程序：

Using this code, I may register a global event handler:

[NSEvent addGlobalMonitorForEventsMatchingMask: NSKeyDownMask 
                                       handler: ^(NSEvent *incomingEvent) {

           NSString *chars = [[incomingEvent characters] lowercaseString];
           unichar character = [chars characterAtIndex:0];    

           // do something useful
           NSLog(@"keydown globally! Which key? This key: %c", character);

        }];

不幸的是，如果支持辅助设备已启用。如果没有启用辅助设备，则不会传递任何事件。

Unfortunately, events get passed along to this monitor, if support for assistive devices is enabled. Without assistive devices being enabled, no events get passed along.

形成文档：

Key-related events may only be monitored if accessibility is enabled or if your 
application is trusted for accessibility access (see AXIsProcessTrusted).

我想知道，如果存在另一种方法，它会传递事件而不强制用户启用

虽然我在Apple的文档中没有找到解决方案，但是解决方案必须存在。例如。 MAS下载的Alfred版本允许定义热键。

While I didn't find a solution in Apple's docs, a solution must exist. E.g. the MAS-downloaded version of Alfred allows to define a hotkey.

有趣的是，Alfred的偏好设置仅显示特殊键，并指出某些特殊键组合可能无法正常工作。

Interestingly, Alfred's preferences only shows special keys and points out, that certain special key combinations may not work.

由于我基本上想显示/隐藏一个全局非激活面板，我可能应该只准备一个系统服务。是否应该？

Since I basically want to show / hide a 'global' non-activating panel, I probably should simply prepare a system service. Should I?

推荐答案

您可以尝试创建一个Quartz事件敲击器， kCGSessionEventTap 作为位置。

You could try creating a Quartz Event Tap, with kCGSessionEventTap as the location.

Quartz Event Services参考

来自 Mac OS X Internals 的示例代码

Quartz Event Services Reference
Sample code from Mac OS X Internals

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