title: iOS 11 - persistent banner notifications
body: <p>iOS 11 has a new feature: persistent banner notifications. You can select this option via the settings menu -> specific app settings -> notifications.</p>
  
  <p>Is there a way to use these persistent banners by default for a specific app I develop? Some configuration in the plist file?</p>
  
  <p>I've seen Google calendar has achieved something like this.</p>
  
  <p>I didn't find any documentation about this matter.</p>