I am coding a game in Swift where the player has to make a move within a second, or else time runs out and he/she loses. How can I make an animation that runs every second, resembling the one in the top of Snapchat stories, where it is a filled in circle that slowly "wipes" away in a circular motion like a windshield wiper? Is it just a second-long GIF that I loop every second? Is there a way to do this with native UIKit graphics?
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I think what you are looking for is a "clock wipe" animation. You can do that by adding a mask layer to your image and animating it using Core Animation.
I wrote a SO post on this very subject: How do you achieve a "clock wipe"/ radial wipe effect in iOS?
