Question

In my app from applicationDidEnterBackground i want to ask the application for more time to

create a UIWebView and load request with UIBackgroundTaskIdentifier, then in the delegate

method of UIWebView (webViewDidFinishLoad) i want to do a stuff there and show an alert or

notification while the

application is still reining in the background .

so how i can do that?.

Answer 1

Apple’s documentation for UIApplication class for beginBackgroundTaskWithExpirationHandler: method says:

You can call this method at any point in your application’s execution.
You may also call this method multiple times to mark the beginning of
several background tasks that run in parallel. However, each task must
be ended separately. You identify a given task using the value
returned by this method.

This method can be safely called on a non-main thread.

So, once web view finish loading in background you can trigger another operation from webViewDidFinishLoad to show alert.