The bulk of the work when going about creating an iOS loading animation is done in after effects. The Lottie framework, by AirBNB (yes that AirBNB), can then be used to import/export animations. Whether you are using Xcode, Swift, or another iOS development platform you can easily add in your JSON animation. If you don’t know what any of this means, don’t worry..you’re developer will 100% know (if they don’t they probably aren’t the right iOS developer).
JSON format is ideal for mobile application and development (iOS and Android). JSON format is an interesting format as it looks like “robot speak” at first glance (a bunch of binary numbers, letters and characters). This is essentially a text file that holds all the data to-be-uploaded to your website or app. When uploaded, the animation appears as a GIF animation but with a clean transparent background.