如何在OS X应用程序中使用Swift监听全局热键？ [英] How to listen to global hotkeys with Swift in an OS X app?

问题描述

我正在尝试在我的用Swift编写的Mac OS X应用程序中使用一个处理程序来处理全局（系统范围内）热键组合，但是我只是找不到合适的文档。我已经读到我必须弄乱一些旧版Carbon API，有没有更好的方法？您能告诉我一些概念证明Swift代码吗？

I'm trying to have a handler in my Mac OS X app written in Swift for a global (system-wide) hotkey combo but I just cannot find proper documentation for it. I've read that I'd have to mess around in some legacy Carbon API for it, is there no better way? Can you show me some proof of concept Swift code? Thanks in advance!

推荐答案

自Swift 2.0起，您现在可以将函数指针传递给C API。

Since Swift 2.0, you can now pass a function pointer to C APIs.

var gMyHotKeyID = EventHotKeyID()
gMyHotKeyID.signature = OSType("swat".fourCharCodeValue)
gMyHotKeyID.id = UInt32(keyCode)

var eventType = EventTypeSpec()
eventType.eventClass = OSType(kEventClassKeyboard)
eventType.eventKind = OSType(kEventHotKeyPressed)

// Install handler.
InstallEventHandler(GetApplicationEventTarget(), {(nextHanlder, theEvent, userData) -> OSStatus in
    var hkCom = EventHotKeyID()
    GetEventParameter(theEvent, EventParamName(kEventParamDirectObject), EventParamType(typeEventHotKeyID), nil, sizeof(EventHotKeyID), nil, &hkCom)

    // Check that hkCom in indeed your hotkey ID and handle it.
}, 1, &eventType, nil, nil)

// Register hotkey.
let status = RegisterEventHotKey(UInt32(keyCode), UInt32(modifierKeys), gMyHotKeyID, GetApplicationEventTarget(), 0, &hotKeyRef)

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