Reading time: 1 min

Here's a simple recipe to help you draw Arc shapes in SwiftUI. For some reason, arcs still aren't a part of the standard Shape package, but fortunately, wrapping them isn't too difficult.

The end result looks like this:


As you can see, the arcs can be stroked and filled just like any other SwiftUI Shape.

Here's the code:

struct Arc: Shape {
  let startAngle: Angle
  let endAngle: Angle
  let clockwise: Bool

  func path(in rect: CGRect) -> Path {
    var path = Path()
    let radius = max(rect.size.width, rect.size.height) / 2
    path.addArc(center: CGPoint(x: rect.midX, y: rect.midY),
                radius: radius,
                startAngle: startAngle,
                endAngle: endAngle,
                clockwise: clockwise)
    return path

And here are some arcs in action:

Arc(startAngle: .degrees(0), endAngle: .degrees(120), clockwise: false)
  .frame(width: 50, height: 50)

Arc(startAngle: .degrees(75), endAngle: .degrees(245), clockwise: true)
  .stroke(, lineWidth: 3)
  .frame(width: 100, height: 100)

Arc(startAngle: .radians(.pi), endAngle: .radians(.pi * 1.5), clockwise: true)
  .stroke(style: .init(lineWidth: 2,
                       lineCap: .round,
                       lineJoin: .miter,
                       miterLimit: 0,
                       dash: [2, 3],
                       dashPhase: 1))
  .frame(width: 70, height: 70)

Next Post Previous Post