Apple Watch ring animation based on DesignCode tutorials

RingAnimation.swift

//
//  AnimatedRing.swift
//  AnimatedRing
//
//  Created by Andres Rojas on 21/11/19.
//  Copyright © 2019 Andres Rojas. All rights reserved.
//

import SwiftUI

struct RingAnimation: View {
    
    @State var show = false

    var body: some View {
        Circle()
            .trim(from: show ? 0.1 : 0.99, to: 1)
            .stroke(Color.blue, style: StrokeStyle(lineWidth: 10, lineCap: .round, lineJoin: .round))
            .rotationEffect(.degrees(90))
            .rotation3DEffect(Angle(degrees: 180), axis: (x: 1, y: 0, z: 0))
            .frame(width: 100, height: 100)
            .animation(.easeOut)
            .onTapGesture {
                self.show.toggle()
        }
    }
}

struct AnimatedRing_Previews: PreviewProvider {
    static var previews: some View {
        RingAnimation()
    }
}