At times, you need to grab your user’s attention. New data might arrive or status might change. You might want to tell your user that there’s going to be a wait before anything more happens—or that the wait is over and it’s time to come back and pay attention. iOS offers many ways to provide that heads-up to the user: from alerts and progress bars to audio pings. In this chapter, you discover how to build these indications into your applications and expand your user-alert vocabulary. You see real-life examples that showcase these classes and discover how to make sure your user pays attention at the right time.
Alerts speak to your user. Members of the