How can I open app from remote notification action button
<p>As in subject, I'm trying to open app when user taps 'Accept' button on remote notification. </p>

<p>Below is listed <code>AppDelegate</code> method which is responsible for handling button action:</p>

<pre><code>- (void)application:(UIApplication *)application handleActionWithIdentifier:(NSString *)identifier forRemoteNotification:(NSDictionary *)notification  completionHandler: (void (^)())completionHandler {

    if ([identifier isEqualToString: @"ACCEPT_IDENTIFIER"]) {

    }

    completionHandler();
}
</code></pre>

<p>I was looking for solution awhile but I can't find helpful information for me.</p>

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<p><strong>Update:</strong>
Because sentence 'Actionable notification buttons' cause confusion, img below shows what I mean by this sentence.</p>

<p><a href="https://i.stack.imgur.com/Ecwly.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Ecwly.png" alt="enter image description here"></a></p>