I would like to recognize to a tab gesture in SwiftUI with two fingers.
How do I change the code
var body: some View {
Image("tap-image")
.gesture(
TapGesture()
.onEnded({
print("Tapped!")
})
)
}if I only want to react to the gesture with two fingers?
Thanks,
Harald
Thanks Claude,
I hope the next version of SwiftUI will handle this better.
This is my code:
struct ContentView: View {
var body: some View {
Rectangle()
.fill(Color.black)
.frame(width: 200, height: 200)
.overlay(
TappableView { gesture in
print("2 touches detected")
})
}
}import SwiftUI
struct TappableView: UIViewRepresentable
{
var tapCallback: (UITapGestureRecognizer) -> Void
typealias UIViewType = UIView
func makeCoordinator() -> TappableView.Coordinator
{
Coordinator(tapCallback: self.tapCallback)
}
func makeUIView(context: UIViewRepresentableContext) -> UIView
{
let view = UIView()
let doubleTapGestureRecognizer = UITapGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleTap(sender:)))
/// Set number of touches.
doubleTapGestureRecognizer.numberOfTouchesRequired = 2
view.addGestureRecognizer(doubleTapGestureRecognizer)
return view
}
func updateUIView(_ uiView: UIView, context: UIViewRepresentableContext)
{
}
class Coordinator
{
var tapCallback: (UITapGestureRecognizer) -> Void
init(tapCallback: @escaping (UITapGestureRecognizer) -> Void)
{
self.tapCallback = tapCallback
}
@objc func handleTap(sender: UITapGestureRecognizer)
{
self.tapCallback(sender)
}
}
}I found nowhere in doc the equivalent of UIKit numberOfTouches.
I don't know if you could create a UIKit gesture and use it here.
May have a look here for some hint:
Thanks Claude,
I hope the next version of SwiftUI will handle this better.
This is my code:
struct ContentView: View {
var body: some View {
Rectangle()
.fill(Color.black)
.frame(width: 200, height: 200)
.overlay(
TappableView { gesture in
print("2 touches detected")
})
}
}import SwiftUI
struct TappableView: UIViewRepresentable
{
var tapCallback: (UITapGestureRecognizer) -> Void
typealias UIViewType = UIView
func makeCoordinator() -> TappableView.Coordinator
{
Coordinator(tapCallback: self.tapCallback)
}
func makeUIView(context: UIViewRepresentableContext) -> UIView
{
let view = UIView()
let doubleTapGestureRecognizer = UITapGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleTap(sender:)))
/// Set number of touches.
doubleTapGestureRecognizer.numberOfTouchesRequired = 2
view.addGestureRecognizer(doubleTapGestureRecognizer)
return view
}
func updateUIView(_ uiView: UIView, context: UIViewRepresentableContext)
{
}
class Coordinator
{
var tapCallback: (UITapGestureRecognizer) -> Void
init(tapCallback: @escaping (UITapGestureRecognizer) -> Void)
{
self.tapCallback = tapCallback
}
@objc func handleTap(sender: UITapGestureRecognizer)
{
self.tapCallback(sender)
}
}
}