您应该看看NSEvent方法mouseLocation

编辑/更新： Xcode 11•Swift 5.1

如果您希望在应用程序处于活动状态时监视任何窗口上的事件，则可以添加与mouseMoved掩码匹配的LocalMonitorForEvents，如果未处于活动状态，则可以添加GlobalMonitorForEvents。请注意，您需要将window属性设置acceptsMouseMovedEvents为true

import Cocoa

class ViewController: NSViewController {
    lazy var window: NSWindow = self.view.window!
    var mouseLocation: NSPoint { NSEvent.mouseLocation }
    var location: NSPoint { window.mouseLocationOutsideOfEventStream }
    override func viewDidLoad() {
        super.viewDidLoad()
        NSEvent.addLocalMonitorForEvents(matching: [.mouseMoved]) {
            print("mouseLocation:", String(format: "%.1f, %.1f", self.mouseLocation.x, self.mouseLocation.y))
            print("windowLocation:", String(format: "%.1f, %.1f", self.location.x, self.location.y))
            return $0
        }
        NSEvent.addGlobalMonitorForEvents(matching: [.mouseMoved]) { _ in
            print(String(format: "%.0f, %.0f", self.mouseLocation.x, self.mouseLocation.y))
        }
    }
    override func viewWillAppear() {
        super.viewWillAppear()
        window.acceptsMouseMovedEvents = true
    }
}

样例项目