How to exit app and return to home screen in iOS 8 using Swift programming

Question

I'm trying to programmatically return to the home screen in an iOS8 App using Swift. I want to continue the application running in the background though. Any ideas on how to do this?

Thanks in advance for the help.

Answer 1

When an app is launched, the system calls the UIApplicationMain function; among its other tasks, this function creates a singleton UIApplication object. Thereafter you access the object by calling the sharedApplication class method.

To exit gracefully (the iOS developer library explicitly warns you not to use exit(0) because this is logged as a crash ) you can use:

UIControl().sendAction(#selector(URLSessionTask.suspend), to: UIApplication.shared, for: nil)

For example, my app exits when the user shakes the device. So, in ViewController.swift:

override func motionEnded(motion: UIEventSubtype,
    withEvent event: UIEvent?) {

        if motion == .MotionShake{

            //Comment: to terminate app, do not use exit(0) bc that is logged as a crash.

            UIControl().sendAction(Selector("suspend"), to: UIApplication.sharedApplication(), forEvent: nil)
        }}