Objective-C / Cocoa：检测所有按键 [英] Objective-C/Cocoa: Detect all keypresses

问题描述

每次用户按下一个键，都可以运行一个方法。基本上，我想在iPhone或iPad上运行一个声音，当按下一个键。 我不想在我的窗口或某个控件中检测键按下，我想检测所有按下（例如当他们在Safari或某物中输入时）。我不需要知道什么

Is it possible to run a method every time the user presses a key. Basically I want to run a sound like on the iPhone or iPad when a key is pressed. I do not want to detect key presses in my window or in a certain control, I want to detect ALL presses (such as when they are typing in Safari or something. I do not need to know what the key is.

感谢

推荐答案

使用 CGEventTapCreate 在此处记录：

https://developer.apple.com/library/mac/#documentation/Carbon/Reference/QuartzEventServicesRef/Reference/reference.html

或使用NSEvents addGlobalMonitorForEventsMatchingMask：handler：在此处记录：

Or use NSEvents addGlobalMonitorForEventsMatchingMask:handler: documented here:

https://developer.apple.com/library/mac/ ＃documentation / Cocoa / Reference / ApplicationKit / Classes / nsevent_Class / Reference / Reference.html

NSEvent示例：

NSEvent Example:

[NSEvent addGlobalMonitorForEventsMatchingMask:(NSKeyDownMask) handler:^(NSEvent *event){
    [self keyWasPressedFunction: event];
    //Or just put your code here
}];

我想说NSEvents更容易...

I would say NSEvents are easier...

注意：

出于安全考虑，Apple要求您在系统偏好设置中启用启用辅助设备的访问权限，以便使用上述方法。

For security reasons, Apple requires you have "Enable access for assistive devices" turned on in System Preferences, in order to use ether of the above methods.

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