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xbee/single.swift

Created August 3, 2019 04:50
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Revisions

  1. xbee created this gist Aug 3, 2019.
    25 changes: 25 additions & 0 deletions single.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,25 @@
    func applicationDidFinishLaunching(aNotification: NSNotification) {
    /* Check if another instance of this app is running. */
    let bundleID = Bundle.main.bundleIdentifier!
    if NSRunningApplication.runningApplications(withBundleIdentifier: bundleID).count > 1 {
    /* Show alert. */
    let alert = NSAlert()
    alert.addButton(withTitle: "OK")
    let appName = Bundle.main.object(forInfoDictionaryKey: kCFBundleNameKey as String) as! String
    alert.messageText = "Another copy of \(appName) is already running."
    alert.informativeText = "This copy will now quit."
    alert.alertStyle = NSAlert.Style.critical
    alert.runModal()

    /* Activate the other instance and terminate this instance. */
    let apps = NSRunningApplication.runningApplications(withBundleIdentifier: bundleID)
    for app in apps {
    if app != NSRunningApplication.current {
    app.activate(options: [.activateAllWindows, .activateIgnoringOtherApps])
    break
    }
    }
    NSApp.terminate(nil)
    }
    /* ... */
    }