SwiftUIで作りながら学ぶアニメーション インジケーター編

SwiftUIで作りながら学ぶアニメーション 
インジケーター編
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2. ࣗݾ঺հ w Ϡϑʔ
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3. ΰʔϧ
4. ࡞Ζ͏ struct ContentView: View { var body: some View { Circle() .trim(from: 0, to: 0.6) .stroke(Color.green, lineWidth: 8) .frame(width: 48, height: 48) } }
5. ʁ
6. StrokeStyle( lineWidth: CGFloat, lineCap: CGLineCap, lineJoin: CGLineJoin, miterLimit: CGFloat, dash: [CGFloat], dashPhase: CGFloat ) StrokeStyle
7. lineCap . round . square . butt
8. dash [ઢͷ௕͞, ۭനͷ௕͞, 2൪໨ͷઢͷ௕͞, 2൪໨ͷۭനͷ௕͞, ...] ഁઢͷܗঢ়Λ഑ྻͰࢦఆ͠·͢ɻ .stroke(Color.green, style: StrokeStyle( lineWidth: 8, lineCap: .round, dash: [0.1, 16]))
9. rotationEffect(_:anchor:) func rotationEffect( _ angle: Angle, anchor: UnitPoint = .center) -> some View Circle() . . . .rotationEffect( Angle(degrees: self.isAnimation ? 360 : 0) ) @State var isAnimation = false
10. .onAppear() { withAnimation( Animation .linear(duration: 1) .repeatForever(autoreverses: false)) { self.isAnimation.toggle() } } @available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *) public func withAnimation<Result>( _ animation: Animation? = .default, _ body: () throws -> Result) rethrows -> Result XJUI"OJNBUJPO @@
11. default linear easeIn easeOut easeInOut
12. άϦϯϐʔεΛଔۀ
13. AngularGradient(gradient: Gradient(colors: [.gray, .white]) άϥσʔγϣϯ Gradient(colors: [.gray, .white]) άϥσʔγϣϯ͍ͤͨ͞৭ͷ഑ྻ
    
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    ์෺ঢ়άϥσʔγϣϯ
15. StrokeStyle( lineWidth: 8, lineCap: .round, dash: [0.1, 16], dashPhase: 8) ) ഁઢͷ։࢝ҐஔΛͣΒ͢ʂ
16. Circle() .trim(from: 0, to: 0.6) .stroke( AngularGradient( gradient: Gradient(colors: [.gray, .white]), center: .center), style: StrokeStyle( lineWidth: 8, lineCap: .round, dash: [0.1, 16], dashPhase: 8)) .frame(width: 48, height: 48) .rotationEffect( Angle(degrees: self.isAnimation ? 360 : 0)) .onAppear() { withAnimation( Animation .linear(duration: 1) .repeatForever(autoreverses: false)) { self.isAnimation.toggle() } }
19. 4XJGU6*ͰΦϦδφϧΞχϝʔγϣϯΛ࢖ͬͯ
    ΞϓϦΛϦονʹʂ