SwiftUIで作りながら学ぶアニメーション 
インジケーター編

Transcript

1. 4XJGU6*㗧Ъ㘊㗪㗌㘉䕎㗶㘕㘾㙔㖽㘪㙚㙦
   
   㘗㙦㘫㘤㖽㘲㖽ᇜ
   QPUBUPUJQT
   
   !UTV[VLJ

2. ࣗݾ঺հ w Ϡϑʔ
   J04ΤϯδχΞ
   w ೥ೖࣾͷ৽ଔ
   w 1BZ1BZϑϦϚ
   J04
   w #POpSF
   J04
   ӡӦ
   w

   झຯ
   ݸਓΞϓϦ
   υοτֆ ॳొஃͰۓுத

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഑ྻ
    
    ͭҎ্⭕ w-JOFBS(SBEJFOU
    ઢܗάϥσʔγϣϯ
    

    w"OHVMBS(SBEJFOU
    ԁܗάϥσʔγϣϯ
    w3BEJBM(SBEJFOU
    ์෺ঢ়άϥσʔγϣϯ
14. None

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() } }
17. None
18. None

19. 4XJGU6*ͰΦϦδφϧΞχϝʔγϣϯΛ࢖ͬͯ
    ΞϓϦΛϦονʹʂ