How to implement a left or right DragGesture() that trigger a switch case in SwiftUI?

Question

I have created a DragGesture in a View that should select a @State(Bool) whether the user swipe left or right.

The thing is that only swiping right is detected.

How to use .gesture() to capture whether a user is swiping left or right on his screen?

import SwiftUI

struct SwiftUIView: View {

  //MARK: Value to change on swipe gesture
  @State var swipeRight: Bool

  var body: some View {
    VStack {
      //MARK: Value displayed after user swiped
      Text($swipeRight ? "Right" : "Left")
    }
    .gesture(
      DragGesture()
        .onChanged { (value) in
          //MARK: What is it missing here?
          switch value.location.x {
          case ...(-0.5):
            self.swipeRight = false
            print("Swipe Left return false")
          case 0.5...:
            self.swipeRight = true
            print("Swipe Right return true")
          default: ()
          }
    })
}

Answer 1

I made a small improvement in @emehex code that will allow you to choose direction

extension View {
    public func dismissingGesture(tolerance: Double = 24, direction: DragGesture.Value.Direction, action: @escaping () -> ()) -> some View {
        gesture(DragGesture()
            .onEnded { value in
                let swipeDirection = value.detectDirection(tolerance)
                if swipeDirection == direction {
                    action()
                }
            }
        )
    }
}

extension DragGesture.Value {
    func detectDirection(_ tolerance: Double = 24) -> Direction? {
        if startLocation.x < location.x - tolerance { return .left }
        if startLocation.x > location.x + tolerance { return .right }
        if startLocation.y > location.y + tolerance { return .up }
        if startLocation.y < location.y - tolerance { return .down }
        return nil
    }

    enum Direction {
        case left
        case right
        case up
        case down
    }
}

 .dismissingGesture(direction: .right){
                // perform action
            }