Based on tobiasahlin's CSS SpinKit, SpinKit is a friendly framework that provides with a set of spinners or loaders. They're perfect to use when your App faces a heavy load task or to help with a transition between scenes.

Every Spinner is a view that implements the SpinnerType interface and exposes four properties to customize it. To start a spinner, simply call its startLoading method. Here's some sample code:

let spinner = WaveSpinner(primaryColor: selectedColor,
                              frame: CGRect(origin: .zero,
                                            size: CGSize(width: 50,
                                                         height: 50)))
 
 spinner.startLoading()

You can change its color, speed of the animation and modify its content insets:

spinner.primaryColor = UIColor.green
spinner.contentInsets = UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)
spinner.animationSpeed = 3      // Speeds up the animation by 3

Note: Don't change these properties once the spinner has started the animation. Some of them are used as part of the animation and it might not have the expected result.

You can also set the isTranslucent property to false (default is true). This makes the view take the primaryColor and show the spinner in a white tint.

• Translucent spinner

• Opaque spinner

Choose the one you like the most ;)