99 lines
3.4 KiB
Swift
99 lines
3.4 KiB
Swift
import UIKit
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import SwiftUI
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/// UIKit 触控捕获视图：将触摸转换为相对坐标（0.0~1.0）的远端输入指令。
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/// 与 Android 端 RemoteTouchView 行为一致：
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/// - 实时转发原始 MotionEvent（DOWN=0 / UP=1 / MOVE=2 / CANCEL=3），远端注入实现"跟手"
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/// - 手指抬起时若判定为滑动（时长 >= 200ms 或位移 >= 2%），额外发送一条 SWIPE 指令
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final class RemoteTouchView: UIView {
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/// Android MotionEvent 动作常量
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enum MotionAction {
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static let down: Int32 = 0
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static let up: Int32 = 1
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static let move: Int32 = 2
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static let cancel: Int32 = 3
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}
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var onMotionEvent: ((Int32, Double, Double) -> Void)?
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var onSwipe: ((Double, Double, Double, Double, Int64) -> Void)?
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private var startX: Double = 0
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private var startY: Double = 0
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private var touchStartTime: TimeInterval = 0
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override init(frame: CGRect) {
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super.init(frame: frame)
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isMultipleTouchEnabled = false
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backgroundColor = .clear
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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isMultipleTouchEnabled = false
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backgroundColor = .clear
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}
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private func relativePoint(of touch: UITouch) -> (Double, Double) {
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let p = touch.location(in: self)
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let w = max(bounds.width, 1)
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let h = max(bounds.height, 1)
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let relX = min(max(Double(p.x / w), 0), 1)
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let relY = min(max(Double(p.y / h), 0), 1)
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return (relX, relY)
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}
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override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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let (x, y) = relativePoint(of: touch)
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startX = x
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startY = y
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touchStartTime = Date().timeIntervalSince1970
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onMotionEvent?(MotionAction.down, x, y)
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}
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override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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let (x, y) = relativePoint(of: touch)
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onMotionEvent?(MotionAction.move, x, y)
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}
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override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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let (x, y) = relativePoint(of: touch)
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onMotionEvent?(MotionAction.up, x, y)
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let duration = Int64((Date().timeIntervalSince1970 - touchStartTime) * 1000)
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let dx = abs(x - startX)
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let dy = abs(y - startY)
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// 非轻点：补发 SWIPE 高层指令（与 Android 端一致）
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if !(duration < 200 && dx < 0.02 && dy < 0.02) {
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onSwipe?(startX, startY, x, y, duration)
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}
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}
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override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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let (x, y) = relativePoint(of: touch)
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onMotionEvent?(MotionAction.cancel, x, y)
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}
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}
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/// SwiftUI 包装：把 UIKit 触控层嵌入 SwiftUI 视图树
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struct TouchOverlay: UIViewRepresentable {
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let onMotionEvent: (Int32, Double, Double) -> Void
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let onSwipe: (Double, Double, Double, Double, Int64) -> Void
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func makeUIView(context: Context) -> RemoteTouchView {
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let view = RemoteTouchView()
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view.onMotionEvent = onMotionEvent
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view.onSwipe = onSwipe
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return view
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}
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func updateUIView(_ uiView: RemoteTouchView, context: Context) {
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uiView.onMotionEvent = onMotionEvent
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uiView.onSwipe = onSwipe
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}
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}
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