Relaunch iOS app without user interface when application in background?

Question

how to relaunch iOS app without user interface when application in background?

I know notification but in any notification user must click alert view button to relaunch or open app.

Answer 1

It is impossible in general case on stock device. It depends what you mean by "user interaction". I had a case for one app(smth like server) where user can do anything with device but do not able to touch screen, because device was placed in special box. I found a way to use Siri. I enabled option "Hey, Siri" and user can re/launch app with voice commands.

Answer 2

You can't, as everyone else has said. You can do background stuff though, but this is limited in various ways:

For iOS apps, it is crucial to know whether your app is running in the foreground or the background. Because system resources are more limited on iOS devices, an app must behave differently in the background than in the foreground. The operating system also limits what your app can do in the background in order to improve battery life and to improve the user’s experience with the foreground app. The operating system notifies your app whenever it moves between the foreground and background. These notifications are your chance to modify your app’s behavior.

-- http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html

Answer 3

There is no way to do this. User must involve for doing this.

Answer 4

So you want to launch your app programmatically, without user interaction ? I do not think there's a way to do it, due to iOS limitation, sorry.