在OS X上使用Swift.如何处理全局鼠标事件?

问题描述

我是Swift和Xcode的新手，下一个问题是

I am new to Swift and Xcode and I have next problem:

我有一个带有一个计数器(Label)的简单Cocoa Swift应用程序.

I have simple Cocoa Swift Application with one counter (Label).

如何处理Mac(在所有应用程序中)中的所有鼠标单击并将其显示在我的Label中?

How to handle all mouse clicks in my Mac (in all applications) and display it in my Label?

我使用Xcode 7.3.1.

I use Xcode 7.3.1.

更新1.我已经发现它是监视可可中的事件和addGlobalMonitorForEventsMatchingMask:handler:功能，但是我不确定自己的方法是否正确.

UPDATE 1. What I have already found it's Monitoring Events and addGlobalMonitorForEventsMatchingMask:handler: function in Cocoa, but I'm not sure that I'm on the right way.

推荐答案

关于使用 addGlobalMonitorForEventsMatchingMask:handler:

一个简单的示例可能看起来像这样:

A simple example might look something like this:

AppDelegate.swift

class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!
    @IBOutlet var textLabel : NSTextField!
    var eventHandler : GlobalEventMonitor?
    var gecount : Int = 0

    func applicationDidFinishLaunching(aNotification: NSNotification) {

        eventHandler = GlobalEventMonitor(mask: .LeftMouseDownMask, handler: { (mouseEvent: NSEvent?) in
        self.gecount += 1
        self.textLabel.stringValue = "global event monitor: \(self.gecount)"
    })
    eventHandler?.start()
  }
}

GlobalEventMonitor.swift

public class GlobalEventMonitor {

    private var monitor: AnyObject?
    private let mask: NSEventMask
    private let handler: NSEvent? -> ()

    public init(mask: NSEventMask, handler: NSEvent? -> ()) {
        self.mask = mask
        self.handler = handler
    }

    deinit {
        stop()
    }

    public func start() {
        monitor = NSEvent.addGlobalMonitorForEventsMatchingMask(mask, handler: handler)
    }

    public func stop() {
        if monitor != nil {
            NSEvent.removeMonitor(monitor!)
            monitor = nil
        }
    }
}

为了捕获应用程序中的事件，您可以使用 addLocalMonitorForEventsMatchingMask:handler: 或 NSClickGestureRecognizer 对象.

In order to capture events within your app your can either use the addLocalMonitorForEventsMatchingMask:handler: or the NSClickGestureRecognizer object.

如果要将全局事件监视器与手势识别器对象组合在一起，只需将两个对象都实现到类中即可.

If you wanted to combine the global event monitor with the gesture recognizer object it's simply a matter of implementing both objects into your class.

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