Understanding the concept of SwiftUI animations

For a developer coming from UIkit and taking their first steps in SwiftUI, the concept of writing animations in a declarative framework could feel a little awkward. After all, performing animations in UIkit was extremely simple – all we had to do was respond to some event and change some view properties within an animation closure. Here’s a simple example of how to fade out a view in UIkit:

UIView.animate(withDuration: 2.0, animations: {
            sampleView.alpha = 0.0
        }) { (finished) in
}

In this example, we modify the alpha level of sampleView inside a UIView animation closure.

While this looks pretty simple, it comes with a significant drawback – the need to sync the animation action to the screen state. The sampleView component is now hidden – but does that mean that our view model or any...