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94 lines
3.0 KiB
94 lines
3.0 KiB
2 years ago
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import UIKit.UIGestureRecognizerSubclass
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import RxSwift
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import RxCocoa
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@available(iOS 9.0, *)
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public class ForceTouchGestureRecognizer: UIGestureRecognizer {
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public var numberOfTouchesRequired: Int = 1
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public private(set) var force: CGFloat = 0
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public private(set) var maximumPossibleForce: CGFloat = 0
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public var fractionCompleted: CGFloat {
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guard maximumPossibleForce > 0 else {
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return 0
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}
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return force / maximumPossibleForce
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}
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public override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
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super.touchesBegan(touches, with: event)
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state = .began
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setForce(for: touches)
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}
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public override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent) {
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super.touchesMoved(touches, with: event)
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state = .changed
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setForce(for: touches)
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}
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public override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent) {
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super.touchesEnded(touches, with: event)
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state = .ended
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setForce(for: touches)
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}
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private func setForce(for touches: Set<UITouch>) {
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guard touches.count == numberOfTouchesRequired, let touch = touches.first else {
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state = .failed
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return
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}
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force = Array(touches)[1...]
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.lazy
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.map { $0.force}
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.reduce(touch.force, +) / CGFloat(touches.count)
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maximumPossibleForce = Array(touches)[1...]
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.lazy
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.map { $0.maximumPossibleForce}
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.reduce(touch.maximumPossibleForce, +) / CGFloat(touches.count)
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}
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}
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@available(iOS 9.0, *)
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public typealias ForceTouchConfiguration = Configuration<ForceTouchGestureRecognizer>
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@available(iOS 9.0, *)
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public typealias ForceTouchControlEvent = ControlEvent<ForceTouchGestureRecognizer>
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@available(iOS 9.0, *)
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public typealias ForceTouchObservable = Observable<ForceTouchGestureRecognizer>
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@available(iOS 9.0, *)
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extension Factory where Gesture == GestureRecognizer {
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/**
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Returns an `AnyFactory` for `ForceTouchGestureRecognizer`
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- parameter configuration: A closure that allows to fully configure the gesture recognizer
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*/
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public static func forceTouch(configuration: ForceTouchConfiguration? = nil) -> AnyFactory {
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return make(configuration: configuration).abstracted()
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}
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}
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@available(iOS 9.0, *)
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extension Reactive where Base: View {
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/**
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Returns an observable `ForceTouchGestureRecognizer` events sequence
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- parameter configuration: A closure that allows to fully configure the gesture recognizer
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*/
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public func forceTouchGesture(configuration: ForceTouchConfiguration? = nil) -> ForceTouchControlEvent {
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return gesture(make(configuration: configuration))
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}
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}
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@available(iOS 9.0, *)
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extension ObservableType where Element: ForceTouchGestureRecognizer {
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/**
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Maps the observable `GestureRecognizer` events sequence to an observable sequence of force values.
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*/
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public func asForce() -> Observable<CGFloat> {
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return self.map { $0.force }
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}
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}
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