Kurdtvs-Live-Kurdish-TV-Kur.../Mastodon/Extension/UIView+Gesture.swift

94 lines
2.6 KiB
Swift

//
// UIView+Gesture.swift
// Mastodon
//
// Created by sxiaojian on 2021/4/14.
//
import Combine
import Foundation
import UIKit
struct GesturePublisher: Publisher {
typealias Output = GestureType
typealias Failure = Never
private let view: UIView
private let gestureType: GestureType
init(view: UIView, gestureType: GestureType) {
self.view = view
self.gestureType = gestureType
}
func receive<S>(subscriber: S) where S: Subscriber,
GesturePublisher.Failure == S.Failure, GesturePublisher.Output
== S.Input
{
let subscription = GestureSubscription(
subscriber: subscriber,
view: view,
gestureType: gestureType
)
subscriber.receive(subscription: subscription)
}
}
enum GestureType {
case tap(UITapGestureRecognizer = .init())
case swipe(UISwipeGestureRecognizer = .init())
case longPress(UILongPressGestureRecognizer = .init())
case pan(UIPanGestureRecognizer = .init())
case pinch(UIPinchGestureRecognizer = .init())
case edge(UIScreenEdgePanGestureRecognizer = .init())
func get() -> UIGestureRecognizer {
switch self {
case let .tap(tapGesture):
return tapGesture
case let .swipe(swipeGesture):
return swipeGesture
case let .longPress(longPressGesture):
return longPressGesture
case let .pan(panGesture):
return panGesture
case let .pinch(pinchGesture):
return pinchGesture
case let .edge(edgePanGesture):
return edgePanGesture
}
}
}
class GestureSubscription<S: Subscriber>: Subscription where S.Input == GestureType, S.Failure == Never {
private var subscriber: S?
private var gestureType: GestureType
private var view: UIView
init(subscriber: S, view: UIView, gestureType: GestureType) {
self.subscriber = subscriber
self.view = view
self.gestureType = gestureType
configureGesture(gestureType)
}
private func configureGesture(_ gestureType: GestureType) {
let gesture = gestureType.get()
gesture.addTarget(self, action: #selector(handler))
view.addGestureRecognizer(gesture)
}
func request(_ demand: Subscribers.Demand) {}
func cancel() {
subscriber = nil
}
@objc
private func handler() {
_ = subscriber?.receive(gestureType)
}
}
extension UIView {
func gesture(_ gestureType: GestureType = .tap()) -> GesturePublisher {
isUserInteractionEnabled = true
return GesturePublisher(view: self, gestureType: gestureType)
}
}