I have a use case in which there is a zoomable and pannable parent view, and a child view that needs to display a custom context menu on long press.
(The reason why I need to implement a custom context menu is this: https://developer.apple.com/forums/thread/773810)
It seems, however, that this setup produces a bug in SwiftUI. The problem is that the onChanged of the drag gesture is only invoked right before its onEnded, hence you cannot smoothly animate the drag:
struct ContentView: View {
var body: some View {
ZStack {
Rectangle()
.foregroundStyle(.green)
.frame(width: 200, height: 200)
.onLongPressGesture {
print("long press")
}
}
.gesture(MagnifyGesture().onEnded { value in
print("magnify end")
})
.gesture(DragGesture()
.onChanged { value in
print("drag change")
}
.onEnded { value in
print("drag end")
})
}
}
Changing the DragGesture to a .highPriorityGesture()
makes the drag's onChange execute at the correct time but results in the LongPressGesture only triggering when the user lifts up his/her finger (which was originally not the case).
So it seems that the two gestures are in a sort of conflict with each other.
Is there a workaround?