Put a centralized WKInterfaceImage in your storyboard, create the @IBOutlet copy the images to the correct bundle and implement the start and stop loader.
@IBOutlet var loader: WKInterfaceImage!
func showLoader() {
loader.setImageNamed("loader")
loader.startAnimatingWithImages(in: NSRange(location: 1,
length: 8), duration: 0.8, repeatCount: -1)
}
func stopLoader() {
self.loader.stopAnimating()
}
The image name loader :
