How to add method from VC in alert handler/closure in DidReceiveLocalNotification? - ios

Question

everyone!
When my app in foreground I want it to show alert when DidReceiveLocalNotification triggered.
I can add alert to mimic local notifications in AppDelegate.swift, but the problem is I don't know how to add method from my ViewController to UIAlertAction closure (see commented line), to finish animation when timer stopped.
My code below:
func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification) {
let alertTimerEnds = UIAlertController(title: "Timer finished!", message: nil, preferredStyle: .Alert)
let okAction = UIAlertAction(title: "OK", style: .Default) { finished in
print("You've pressed OK button")
//self.ViewController().finishAnimation()
}
alertTimerEnds.addAction(okAction)
self.window?.rootViewController?.presentViewController(alertTimerEnds, animated: true, completion: nil)
}
Maybe I should do it in ViewController usind AppDelegate?
let someAppDelegate = UIApplication.sharedApplication().delegate as? AppDelegate
someAppDelegate?.application(UIApplication.sharedApplication(), didReceiveLocalNotification: UILocalNotification) { code for alert }

Answer 1

If you want to do that
func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification)
{
var viewController : UIViewController = (application.keyWindow?.rootViewController)!
while ((viewController.presentedViewController) != nil) {
viewController = viewController.presentedViewController!
}
let alert = UIAlertController(title: "", message: notification.alertBody, preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: {(action: UIAlertAction!) in}))
viewController.presentViewController(alert, animated: true, completion: nil)
})
Show UIAlertController in didReceiveLocalNotification method

Answer 2

Try with below code, this will display alert on viewcontroller which is present at a moment.
func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification) {
var latestViewController : UIViewController!
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
if let viewControllers = appDelegate.window?.rootViewController?.presentedViewController {
latestViewController = viewControllers as UIViewController
}
else if let viewControllers = appDelegate.window?.rootViewController?.childViewControllers {
latestViewController = viewControllers.last! as UIViewController
}
//var alert: UIAlertView!
//alert = UIAlertView(title: "Title", message:"Message , delegate: nil, cancelButtonTitle:"Ok" )
//alert.show()
let alert = UIAlertController(title: "Title", message:"Message", preferredStyle: .Alert)
let action = UIAlertAction(title: "OK", style: .Default) { _ in
// Put here any code that you would like to execute when
// the user taps that OK button (may be empty in your case if that's just
// an informative alert)
}
alert.addAction(action)
latestViewController.presentViewController(alert, animated: true){}
}
How do I migrate from UIAlertView (deprecated in iOS8)