はてなブックマーク

import UIKit import Swiftalytics struct ScreenTracking { static func setup() { FirstViewController.self >> "First Screen" SecondViewController.self >> "Second Screen" } } extension UIViewController { public override class func initialize() { struct Static { static var token: dispatch_once_t = 0 } // make sure this isn't a subclass if self !== UIViewController.self { return } dispatch_once(&Static.