Let's imagine, here is a ScrollView with some elements and I want to make some actions (e.g. changing of color) on long tap on these elements. But also I want to make possible to scroll this view.
Here is an example:
import SwiftUI
struct TextBox: View {
var text: String
var color: Color
@GestureState private var isLongPressure: Bool = false
var body: some View {
let longTap = LongPressGesture(minimumDuration: 0.3)
.updating($isLongPressure) { state, newState, transaction in
newState = state
transaction.animation = .easeOut(duration: 0.2)
}
Text(text)
.frame(width: 400, height: 200)
.background(isLongPressure ? .white : color)
.simultaneousGesture(longTap)
}
}
struct TestGestures: View {
var body: some View {
ScrollView {
TextBox(text: "Test 1", color: .red)
TextBox(text: "Test 2", color: .green)
TextBox(text: "Test 3", color: .blue)
TextBox(text: "Test 4", color: .red)
TextBox(text: "Test 5", color: .green)
TextBox(text: "Test 6", color: .blue)
}
}
}
struct TestGestures_Previews: PreviewProvider {
static var previews: some View {
TestGestures()
}
}
So, if I comment .simultaneousGesture(longTap)
– scrolling works, but if I uncomment it – scrolling stopped work.
P.S.: I've tried to add onTapGesture
before adding longTap and it doesn't help.
I was able to get it working by utilizing a button rather than a TextView. Although this does directly utilize the code you provided, you should be able to modify some pieces to have it meet your needs (I can help with this, if needed!)
import SwiftUI
struct ScrollTest: View {
let testData = [1]
var body: some View {
ScrollView(.vertical, showsIndicators: false) {
AnimatedButtonView(color: .red, text: "Test 1")
AnimatedButtonView(color: .green, text: "Test 2")
AnimatedButtonView(color: .blue, text: "Test 3")
}
}
}
struct AnimatedButtonView: View {
@GestureState var isDetectingLongPress = false
let color: Color
let text: String
var body: some View {
ZStack {
RoundedRectangle(cornerRadius: 12.5, style: .continuous)
.fill(color)
.frame(width: UIScreen.main.bounds.width, height: 200)
.padding(25)
.scaleEffect(!isDetectingLongPress ? 1.0 : 0.875)
.brightness(!isDetectingLongPress ? 0.0 : -0.125)
.animation(.easeInOut(duration: 0.125), value: isDetectingLongPress)
Text(text)
}
.delaysTouches(for: 0.01) {
//some code here, if needed
}
.gesture(
LongPressGesture(minimumDuration: 3)
.updating($isDetectingLongPress) { currentState, gestureState,
transaction in
gestureState = currentState
transaction.animation = Animation.easeIn(duration: 2.0)
}
.onEnded { finished in
print("gesture ended")
})
}
}
extension View {
func delaysTouches(for duration: TimeInterval = 0.25, onTap action: @escaping () -> Void = {}) -> some View {
modifier(DelaysTouches(duration: duration, action: action))
}
}
fileprivate struct DelaysTouches: ViewModifier {
@State private var disabled = false
@State private var touchDownDate: Date? = nil
var duration: TimeInterval
var action: () -> Void
func body(content: Content) -> some View {
Button(action: action) {
content
}
.buttonStyle(DelaysTouchesButtonStyle(disabled: $disabled, duration: duration, touchDownDate: $touchDownDate))
.disabled(disabled)
}
}
fileprivate struct DelaysTouchesButtonStyle: ButtonStyle {
@Binding var disabled: Bool
var duration: TimeInterval
@Binding var touchDownDate: Date?
func makeBody(configuration: Configuration) -> some View {
configuration.label
.onChange(of: configuration.isPressed, perform: handleIsPressed)
}
private func handleIsPressed(isPressed: Bool) {
if isPressed {
let date = Date()
touchDownDate = date
DispatchQueue.main.asyncAfter(deadline: .now() + max(duration, 0)) {
if date == touchDownDate {
disabled = true
DispatchQueue.main.async {
disabled = false
}
}
}
} else {
touchDownDate = nil
disabled = false
}
}
}