ios web markup iOS 9学习系列：Search API(3)

func application(application: UIApplication, continueUserActivity userActivity: NSUserActivity, restorationHandler: ([AnyObject]?) -> Void) -> Bool {
    let splitController = self.window?.rootViewController as! UISplitViewController
    let navigationController = splitController.viewControllers.first as! UINavigationController
    navigationController.topViewController?.restoreUserActivityState(userActivity)
    return true
}

接下来，在MasterViewController类里实现restoreUserActivityState方法：

override func restoreUserActivityState(activity: NSUserActivity) {
    if let name = activity.userInfo?["name"] as? String,
        let genre = activity.userInfo?["genre"] as? String,
        let time = activity.userInfo?["time"] as? NSDate {
        let show = Show(name: name, genre: genre, time: time)
        self.showToRestore = show
         
        self.performSegueWithIdentifier("showDetail", sender: self)
    }
    else {
        let alert = UIAlertController(title: "Error", message: "Error retrieving information from userInfo:\n\(activity.userInfo)", preferredStyle: .Alert)
        alert.addAction(UIAlertAction(title: "Dismiss", style: .Cancel, handler: nil))
         
        self.presentViewController(alert, animated: true, completion: nil)
    }
}

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