具有类似 Dropbox 行为的 StatusBarIcon

Question

我想制作一个只有 MenuBar 的应用程序，它每 30 秒检查一次 API 并根据标志的状态更改 StatusBarIcon。我一直在关注本教程：https://nsrover.wordpress.com/2014/10/10/creating-a-os-x-menubar-only-app/ 但我只能在 applicationDidFinishLaunching 函数中第一次做到这一点。

func applicationDidFinishLaunching(_ aNotification: Notification) {
    // Insert code here to initialize your application

    statusBarItem = NSStatusBar.system().statusItem(withLength: NSSquareStatusItemLength)
    statusBarItem?.image = #imageLiteral(resourceName: "locked")


    self.fetchOccupied { (occupied) in
        if (occupied) {
            self.statusBarItem?.image = #imageLiteral(resourceName: "locked")
        } else {
            self.statusBarItem?.image = #imageLiteral(resourceName: "unlocked")
        }
    }
}

在那之后，就像我说的，我想每 30 秒再次检查一次，而不必单击 StatusBarItem，但我不能将循环放在该函数中，因为那样应用程序将永远不会启动。

我不知道将循环放在哪里，因为我没有主 ViewController 或任何东西。我只有 AppDelegate class 和 XIB 文件。

在哪里可以创建函数来放置循环？也许我可以将该循环异步放入 applicationDidFinishLaunching 函数中？

谢谢。

Answer 1

var timer: DispatchSourceTimer?

func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Insert code here to initialize your application

    self.timer = DispatchSource.makeTimerSource(flags: DispatchSource.TimerFlags(), queue: DispatchQueue.global(qos: DispatchQoS.QoSClass.userInitiated))
    self.timer?.scheduleRepeating(deadline: DispatchTime.now(), interval: DispatchTimeInterval.seconds(30), leeway: DispatchTimeInterval.seconds(0))
    self.timer?.setEventHandler(handler: {
        //loop body here
        print("timer fire", separator: "", terminator: "\n")
    })
    self.timer?.resume()
}

Answer 2

您只需运行一个时钟，每 30 秒收到一次通知。

func applicationDidFinishLaunching(_ aNotification: Notification) {
    NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: #selector(updateClock), userInfo: nil, repeats: true)
}

func updateClock() {
    let date = NSDate()
    let calendar = NSCalendar.current
    let components = calendar.dateComponents([.second],from:date as Date) as NSDateComponents
    if components.second == 0 || components.second == 30 {
        makeStatusMenu()
    }
}

func makeStatusMenu() {

}

具有类似 Dropbox 行为的 StatusBarIcon

StatusBarIcon with Dropbox like behavior

macos

xcode

swift

swift3

macos-sierra