Swift infinite image rotation

This snippet will be the last in our series on Swift animations for now. We will see how to set up the infinite image rotation. We  use it for a starry background 😊.

Previous articles were:

Snippet: Swift UILabel, letter animation

Here is a snippet to animate the display of a UILabel as if you were typing text on the keyboard ...

We Are Open SourcePierre Brisorgueil

Snippet: Swift SnapKit & RxSwift animation

Here is a code snippet of a sample animation with RxSwift and Snapkit. It is not that complicated ...

We Are Open SourcePierre Brisorgueil

Image

    let stars = UIImageView().then {
        $0.contentMode = .scaleToFill
        $0.alpha = 1
        $0.image = UIImage(named: "stars")
        $0.alpha = 0.4
    }

Rotation

    private func rotateImageView() {
        UIView.animate(withDuration: 240, delay: 0, options: UIView.AnimationOptions.curveLinear, animations: { () -> Void in
            self.stars.transform = self.stars.transform.rotated(by: .pi / 2)
        }) { (finished) -> Void in
            if finished {
                self.rotateImageView()
            }
        }
    }

Launch

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        rotateImageView()
    }

Perfect 👏

To give you an idea, by assembling the three articles listed above, we can achieve this :