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import SwiftUI | |
struct PaymentRing: View { | |
@State var frameSize = UIScreen.main.bounds.width - 120 | |
@State var current: CGFloat = 0 | |
@State var value: Double = 0 | |
var body: some View { | |
VStack { | |
ZStack { | |
Circle().stroke(Color.secondary, style: StrokeStyle(lineWidth: 40, lineCap: .butt, lineJoin: .round)).frame(width: frameSize, height: frameSize) | |
Circle().trim(from: 0, to: current).stroke(Color.green, style: StrokeStyle(lineWidth: 40, lineCap: .round, lineJoin: .round)).frame(width: frameSize, height: frameSize).rotationEffect(.init(degrees: -90)) | |
Circle().fill(Color.white).frame(width: 40, height: 40).offset(x: frameSize/2).rotationEffect(.init(degrees: value)).gesture(DragGesture().onChanged(onDrag(value:))).rotationEffect(.init(degrees: -90)) | |
HStack { | |
Text("$") | |
Text(String(format: "%.0f", current * 1000)).font(.largeTitle) | |
} | |
} | |
} | |
} | |
func onDrag(value: DragGesture.Value) { | |
let radianVector = CGVector(dx: value.location.x, dy: value.location.y) | |
let radian = atan2(radianVector.dy - 20, radianVector.dx - 20) | |
var angleValue = radian * 180 / .pi | |
if angleValue < 0 { | |
angleValue = 360 + angleValue | |
} | |
withAnimation(Animation.linear(duration: 0.25)) { | |
let current = angleValue / 360 | |
self.current = current | |
self.value = Double(angleValue) | |
} | |
} | |
} | |
struct PaymentRing_Previews: PreviewProvider { | |
static var previews: some View { | |
PaymentRing().preferredColorScheme(.dark) | |
} | |
} |
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