When building an Ionic app, there are times when you need to convey critical information to your users. In such situations, using a popup might not be the most effective solution due to its limitations. Instead, you can utilize Ionic's loading overlay in conjunction with gestures to create a more flexible and interactive alternative.
In this article, we'll explore how to use Ionic's $ionicLoading component to display images and messages, providing a more engaging user experience. This technique is particularly useful when you need to show important information before allowing users to interact with the app.
The Ionic loading overlay is typically used to indicate that an app is loading a resource. However, its flexible design allows us to repurpose it for displaying custom content. By setting the template property of the overlay, we can include any HTML code we desire.
To demonstrate this approach, we'll build upon the Ionic sidemenu starter template and use beta 14 of Ionic. We'll start by adding references to the playlist controller, including Angular's $timeout and Ionic's $ionicLoading and $ionicGesture. We'll also define a showingOverlay variable to track whether the overlay is currently displayed.
To display the loading overlay, we'll call its show() method, passing in options that include the template HTML. In our example, this includes an image tag pointing to a picture in our 'img' directory. We can customize other properties as needed, such as setting the maxWidth property or enabling a backdrop.
Once the overlay is displayed, we'll need to handle user interactions. To do so, we'll hook it with a gesture event using Ionic's built-in gestures. When the user taps the overlay, we'll hide it and unbind the event. We'll also update our showingOverlay flag to reflect that the overlay is no longer displayed.
To ensure that the code runs after the overlay has been rendered, we'll wrap it in an Angular $timeout. This allows us to find the overlay element on the page once it's been fully rendered.
In conclusion, using Ionic's $ionicLoading component in conjunction with gestures provides a powerful way to display interactive messages and images in your app. By leveraging this technique, you can create a more engaging user experience that effectively conveys important information before allowing users to interact with your app.
About the Author
Troy Miles, aka the Rockncoder, is a seasoned developer with over 35 years of experience writing games and web apps. He currently works for a Southern California-based automotive valuation and information company and enjoys sharing his expertise through blog posts and YouTube videos.