feat: 加速后匀速

wake/View/Blind/Box6.swift

@@ -3,240 +3,193 @@ import SwiftUI
 struct FilmAnimation: View {
     // 设备尺寸
     private let deviceWidth = UIScreen.main.bounds.width
-    private let deviceHeight = UIScreen.main.bounds.height
     
     // 动画状态控制
-    @State private var animationProgress: CGFloat = 0.0  // 0-1总进度
-    @State private var isAnimating: Bool = false
-    @State private var animationComplete: Bool = false
+    @State private var animationProgress: CGFloat = 0.0
+    @State private var hasAccelerated: Bool = false  // 标记是否完成第一遍加速
     
-    // 胶卷数据
-    private let reelImages: [[String]] = [
-        (0..<300).map { "film1-\($0+1)" },  // 上方胶卷
-        (0..<350).map { "film2-\($0+1)" },  // 中间胶卷
-        (0..<300).map { "film3-\($0+1)" }   // 下方胶卷
-    ]
+    // 胶卷数据（16帧）
+    private let reelFrames: Int = 16
+    private var reel1: [String] { (0..<reelFrames).map { "film1-\($0+1)" } }
+    private var reel2: [String] { (0..<reelFrames).map { "film2-\($0+1)" } }
+    private var reel3: [String] { (0..<reelFrames).map { "film3-\($0+1)" } }
     
-    // 胶卷参数
+    // 胶卷参数（轮播图关键参数）
     private let frameWidth: CGFloat = 90
     private let frameHeight: CGFloat = 130
     private let frameSpacing: CGFloat = 12
+    private var frameTotalWidth: CGFloat { frameWidth + frameSpacing }
+    private var visibleFrames: Int { Int(deviceWidth / frameTotalWidth) + 2 }  // 可见帧数
     
-    // 动画阶段时间参数
-    private let accelerationDuration: Double = 5.0   // 0-5s加速
-    private let constantSpeedDuration: Double = 1.0  // 5-6s匀速
-    private let scaleStartDuration: Double = 1.0     // 6-7s共同放大
-    private let scaleFinishDuration: Double = 1.0    // 7-8s仅中间胶卷放大
-    private var totalDuration: Double {
-        accelerationDuration + constantSpeedDuration + scaleStartDuration + scaleFinishDuration
-    }
+    // 动画时间参数
+    private let accelerationDuration: Double = 3.0  // 加速时间
+    private let cycleDuration: Double = 2.0         // 匀速循环周期
     
-    // 各阶段进度阈值
-    private var accelerationEnd: CGFloat { accelerationDuration / totalDuration }
-    private var constantSpeedEnd: CGFloat { (accelerationDuration + constantSpeedDuration) / totalDuration }
-    private var scaleStartEnd: CGFloat {
-        (accelerationDuration + constantSpeedDuration + scaleStartDuration) / totalDuration
-    }
+    // 布局与运动参数
+    private let upperTilt: Double = -10  // 上卷左高右低
+    private let lowerTilt: Double = 10   // 下卷左低右高
+    private let verticalSpacing: CGFloat = 200
     
-    // 布局与运动参数（核心：对称倾斜角度）
-    private let tiltAngle: Double = 10  // 基础倾斜角度
-    private let upperTilt: Double = -10  // 上方胶卷：左高右低（负角度）
-    private let lowerTilt: Double = 10   // 下方胶卷：左低右高（正角度）
-    private let verticalSpacing: CGFloat = 200  // 上下胶卷垂直间距
-    private let finalScale: CGFloat = 4.5
-    
-    // 移动距离参数
-    private let maxTiltedReelMovement: CGFloat = 3500  // 倾斜胶卷最大移动距离
-    private let maxMiddleReelMovement: CGFloat = -3000  // 中间胶卷最大移动距离
+    // 轮播关键参数（轨道长度 = 单组帧总宽度）
+    private var trackLength: CGFloat { CGFloat(reelFrames) * frameTotalWidth }
     
     var body: some View {
-        // 固定背景
-        Color(red: 0.08, green: 0.08, blue: 0.08)
-            .edgesIgnoringSafeArea(.all)
-            .overlay(
-                ZStack {
-                    // 上方倾斜胶卷（左高右低，向右移动）
-                    if showTiltedReels {
-                        FilmReelView(images: reelImages[0])
-                            .rotationEffect(Angle(degrees: upperTilt))  // 左高右低
-                            .offset(x: upperReelXPosition, y: -verticalSpacing/2)
-                            .scaleEffect(tiltedScale)
-                            .opacity(tiltedOpacity)
-                            .zIndex(1)
-                    }
+        ZStack {
+            // 上方胶卷（右向轮播）
+            FilmCarouselView(images: reel1)
+                .rotationEffect(Angle(degrees: upperTilt))
+                .offset(x: upperTrackPosition, y: -verticalSpacing/2)
+                .zIndex(1)
             
-                    // 下方倾斜胶卷（左低右高，向右移动）
-                    if showTiltedReels {
-                        FilmReelView(images: reelImages[2])
-                            .rotationEffect(Angle(degrees: lowerTilt))  // 左低右高
-                            .offset(x: lowerReelXPosition, y: verticalSpacing/2)
-                            .scaleEffect(tiltedScale)
-                            .opacity(tiltedOpacity)
-                            .zIndex(1)
-                    }
+            // 下方胶卷（右向轮播）
+            FilmCarouselView(images: reel3)
+                .rotationEffect(Angle(degrees: lowerTilt))
+                .offset(x: lowerTrackPosition, y: verticalSpacing/2)
+                .zIndex(1)
             
-                    // 中间胶卷（垂直，向左移动）
-                    FilmReelView(images: reelImages[1])
-                        .offset(x: middleReelXPosition, y: 0)
-                        .scaleEffect(middleScale)
-                        .opacity(1.0)
-                        .zIndex(2)
-                        .edgesIgnoringSafeArea(.all)
-                }
-            )
-            .onAppear {
-                startAnimation()
-            }
+            // 中间胶卷（左向轮播）
+            FilmCarouselView(images: reel2)
+                .offset(x: middleTrackPosition, y: 0)
+                .zIndex(2)
+        }
+        .onAppear {
+            startCarouselAnimation()
+        }
     }
     
-    // MARK: - 动画逻辑
+    // MARK: - 轮播动画控制（核心轮播逻辑）
     
-    private func startAnimation() {
-        guard !isAnimating && !animationComplete else { return }
-        isAnimating = true
-        
-        withAnimation(Animation.easeInOut(duration: totalDuration)) {
+    private func startCarouselAnimation() {
+        // 第一阶段：加速动画
+        withAnimation(Animation.linear(duration: accelerationDuration)) {
             animationProgress = 1.0
         }
         
-        DispatchQueue.main.asyncAfter(deadline: .now() + totalDuration) {
-            isAnimating = false
-            animationComplete = true
+        // 加速完成后进入匀速循环
+        DispatchQueue.main.asyncAfter(deadline: .now() + accelerationDuration) {
+            hasAccelerated = true
+            // 匀速循环动画
+            withAnimation(Animation.linear(duration: cycleDuration).repeatForever(autoreverses: false)) {
+                animationProgress = 2.0  // 从1.0到2.0实现一次循环
+            }
         }
     }
     
-    // MARK: - 位置计算（确保向右移动）
+    // MARK: - 速度计算（加速到匀速过渡）
     
-    // 上方倾斜胶卷X位置
-    private var upperReelXPosition: CGFloat {
-        let startPosition: CGFloat = -deviceWidth * 1.2  // 左侧屏幕外起始
-        return startPosition + (maxTiltedReelMovement * movementProgress)
-    }
-    
-    // 下方倾斜胶卷X位置
-    private var lowerReelXPosition: CGFloat {
-        let startPosition: CGFloat = -deviceWidth * 0.8  // 稍右于上方胶卷起始
-        return startPosition + (maxTiltedReelMovement * movementProgress)
-    }
-    
-    // 中间胶卷X位置
-    private var middleReelXPosition: CGFloat {
-        let startPosition: CGFloat = deviceWidth * 0.3
-        return startPosition + (maxMiddleReelMovement * movementProgress)
-    }
-    
-    // 移动进度（0-1）
-    private var movementProgress: CGFloat {
-        if animationProgress < constantSpeedEnd {
-            return animationProgress / constantSpeedEnd
+    private var effectiveProgress: CGFloat {
+        if !hasAccelerated {
+            // 加速阶段：0→1（三次方曲线加速）
+            return animationProgress * animationProgress * animationProgress
         } else {
-            return 1.0  // 6秒后停止移动
+            // 匀速阶段：1→2（线性运动）
+            return 1.0 + (animationProgress - 1.0).truncatingRemainder(dividingBy: 1.0)
         }
     }
     
-    // MARK: - 缩放与显示控制
+    // MARK: - 轨道位置计算（轮播图核心算法）
     
-    // 中间胶卷缩放
-    private var middleScale: CGFloat {
-        guard animationProgress >= constantSpeedEnd else {
-            return 1.0
-        }
-        
-        let scalePhaseProgress = (animationProgress - constantSpeedEnd) / (1.0 - constantSpeedEnd)
-        return 1.0 + (finalScale - 1.0) * scalePhaseProgress
+    private var upperTrackPosition: CGFloat {
+        // 右向轮播：使用负偏移实现向右移动
+        let rawPosition = -effectiveProgress * trackLength
+        // 当移动距离超过单组长度时，重置位置（无痕循环关键）
+        return rawPosition.truncatingRemainder(dividingBy: -trackLength)
     }
     
-    // 倾斜胶卷缩放
-    private var tiltedScale: CGFloat {
-        guard animationProgress >= constantSpeedEnd, animationProgress < scaleStartEnd else {
-            return 1.0
-        }
-        
-        let scalePhaseProgress = (animationProgress - constantSpeedEnd) / (scaleStartEnd - constantSpeedEnd)
-        return 1.0 + (finalScale * 0.6 - 1.0) * scalePhaseProgress
+    private var lowerTrackPosition: CGFloat {
+        // 右向轮播：与上方胶卷错开3帧位置
+        let rawPosition = -effectiveProgress * trackLength + frameTotalWidth * 3
+        return rawPosition.truncatingRemainder(dividingBy: -trackLength)
     }
     
-    // 倾斜胶卷透明度
-    private var tiltedOpacity: Double {
-        guard animationProgress >= constantSpeedEnd, animationProgress < scaleStartEnd else {
-            return 0.8
-        }
-        
-        let fadeProgress = (animationProgress - constantSpeedEnd) / (scaleStartEnd - constantSpeedEnd)
-        return 0.8 * (1.0 - fadeProgress)
-    }
-    
-    // 控制倾斜胶卷显示
-    private var showTiltedReels: Bool {
-        animationProgress < scaleStartEnd
+    private var middleTrackPosition: CGFloat {
+        // 左向轮播：使用正偏移实现向左移动
+        let rawPosition = effectiveProgress * trackLength
+        return rawPosition.truncatingRemainder(dividingBy: trackLength)
     }
 }
 
-// MARK: - 胶卷组件
+// MARK: - 胶卷轮播组件（轮播图核心视图）
 
-struct FilmReelView: View {
+struct FilmCarouselView: View {
     let images: [String]
     
     var body: some View {
         HStack(spacing: 12) {
+            // 核心轮播技巧：显示两组相同帧，当第一组移出视野时第二组无缝衔接
+            ForEach(images.indices, id: \.self) { index in
+                FilmFrameView(imageName: images[index])
+            }
+            // 复制一组帧实现无痕循环
             ForEach(images.indices, id: \.self) { index in
                 FilmFrameView(imageName: images[index])
             }
         }
+        // 限制显示区域，超出部分隐藏（轮播图必要设置）
+        .mask(
+            HStack {
+                Spacer()
+                Rectangle()
+                    .frame(width: UIScreen.main.bounds.width * 1.2)  // 稍宽于屏幕确保无空白
+                Spacer()
+            }
+        )
     }
 }
 
+// MARK: - 胶卷帧组件
+
 struct FilmFrameView: View {
     let imageName: String
     
     var body: some View {
         ZStack {
-            // 胶卷边框
             RoundedRectangle(cornerRadius: 4)
                 .stroke(Color.gray, lineWidth: 2)
                 .background(Color(red: 0.15, green: 0.15, blue: 0.15))
             
-            // 帧内容
             Rectangle()
                 .fill(gradientColor)
                 .cornerRadius(2)
                 .padding(2)
             
-            // 帧标识
             Text(imageName)
                 .foregroundColor(.white)
                 .font(.caption2)
         }
         .frame(width: 90, height: 130)
-        // 胶卷孔洞
-        .overlay(
-            HStack {
-                VStack(spacing: 6) {
-                    ForEach(0..<6) { _ in
-                        Circle()
-                            .frame(width: 6, height: 6)
-                            .foregroundColor(.gray)
-                    }
-                }
-                Spacer()
-                VStack(spacing: 6) {
-                    ForEach(0..<6) { _ in
-                        Circle()
-                            .frame(width: 6, height: 6)
-                            .foregroundColor(.gray)
-                    }
+        .overlay(alignment: .leading) {
+            VStack(spacing: 6) {
+                ForEach(0..<6) { _ in
+                    Circle()
+                        .frame(width: 6, height: 6)
+                        .foregroundColor(.gray)
                 }
             }
-        )
+            .padding(.leading, -3)
+        }
+        .overlay(alignment: .trailing) {
+            VStack(spacing: 6) {
+                ForEach(0..<6) { _ in
+                    Circle()
+                        .frame(width: 6, height: 6)
+                        .foregroundColor(.gray)
+                }
+            }
+            .padding(.trailing, -3)
+        }
     }
     
     private var gradientColor: LinearGradient {
-        if imageName.hasPrefix("film1") {
-            return LinearGradient(gradient: Gradient(colors: [.blue, .indigo]), startPoint: .topLeading, endPoint: .bottomTrailing)
-        } else if imageName.hasPrefix("film2") {
-            return LinearGradient(gradient: Gradient(colors: [.yellow, .orange]), startPoint: .topLeading, endPoint: .bottomTrailing)
-        } else {
-            return LinearGradient(gradient: Gradient(colors: [.purple, .pink]), startPoint: .topLeading, endPoint: .bottomTrailing)
+        switch imageName.prefix(5) {
+        case "film1":
+            return LinearGradient(colors: [.blue, .indigo], startPoint: .topLeading, endPoint: .bottomTrailing)
+        case "film2":
+            return LinearGradient(colors: [.yellow, .orange], startPoint: .topLeading, endPoint: .bottomTrailing)
+        case "film3":
+            return LinearGradient(colors: [.purple, .pink], startPoint: .topLeading, endPoint: .bottomTrailing)
+        default:
+            return LinearGradient(colors: [.gray, .white], startPoint: .topLeading, endPoint: .bottomTrailing)
         }
     }
 }
@@ -245,6 +198,7 @@ struct FilmFrameView: View {
 struct FilmAnimation_Previews: PreviewProvider {
     static var previews: some View {
         FilmAnimation()
+            .background(Color.black)
     }
 }
     

wake/View/Blind/Box7.swift

@@ -0,0 +1,246 @@
+import SwiftUI
+import UIKit
+
+// 胶卷帧数据模型
+struct FilmFrame: Identifiable {
+    let id = UUID()
+    let imageName: String
+    let systemImage: String
+}
+
+// 动画控制器
+class FilmAnimationController: NSObject, ObservableObject {
+    @Published var offset: CGFloat = 0
+    var currentSpeed: CGFloat = 0
+    var lastUpdateTime: CFTimeInterval = 0
+    var startTime: CFTimeInterval = 0
+    var isAccelerating = true
+    var displayLink: CADisplayLink?
+    
+    // 配置参数 - 提高最大速度
+    let frames: [FilmFrame]
+    let rotationAngle: Double
+    let verticalOffset: CGFloat
+    let direction: Direction
+    let initialSpeed: CGFloat
+    let maxSpeed: CGFloat  // 增大此值提高最终速度
+    let accelerationDuration: Double
+    let frameWidth: CGFloat
+    let spacing: CGFloat
+    let frameCycleWidth: CGFloat
+    let isMiddleReel: Bool
+    
+    // 运动方向枚举
+    enum Direction {
+        case left
+        case right
+        
+        var multiplier: CGFloat {
+            switch self {
+            case .left: return -1
+            case .right: return 1
+            }
+        }
+    }
+    
+    // 初始化 - 调整最大速度参数
+    init(frames: [FilmFrame], rotationAngle: Double, verticalOffset: CGFloat, direction: Direction,
+         isMiddleReel: Bool = false,
+         initialSpeed: CGFloat = 100,  // 提高初始速度
+         maxSpeed: CGFloat = 600,      // 显著提高最大速度（原400）
+         accelerationDuration: Double = 4,  // 略微缩短加速时间
+         frameWidth: CGFloat = 100, spacing: CGFloat = 10) {
+        self.frames = frames
+        self.rotationAngle = rotationAngle
+        self.verticalOffset = verticalOffset
+        self.direction = direction
+        self.initialSpeed = initialSpeed
+        self.maxSpeed = maxSpeed
+        self.accelerationDuration = accelerationDuration
+        self.frameWidth = frameWidth
+        self.spacing = spacing
+        self.isMiddleReel = isMiddleReel
+        
+        let baseFramesCount = CGFloat(frames.count)
+        let adjustedFramesCount = isMiddleReel ? baseFramesCount * 1.5 : baseFramesCount
+        self.frameCycleWidth = adjustedFramesCount * (frameWidth + spacing)
+        
+        super.init()
+    }
+    
+    // 启动动画
+    func startAnimation() {
+        offset = -frameCycleWidth / (isMiddleReel ? 1.5 : 1)
+        currentSpeed = initialSpeed
+        startTime = CACurrentMediaTime()
+        lastUpdateTime = CACurrentMediaTime()
+        displayLink = CADisplayLink(target: self, selector: #selector(updateAnimation(_:)))
+        displayLink?.add(to: .main, forMode: .common)
+    }
+    
+    // 停止动画
+    func stopAnimation() {
+        displayLink?.invalidate()
+        displayLink = nil
+    }
+    
+    // 每帧更新动画
+    @objc private func updateAnimation(_ displayLink: CADisplayLink) {
+        let currentTime = CACurrentMediaTime()
+        let deltaTime = currentTime - lastUpdateTime
+        lastUpdateTime = currentTime
+        
+        // 处理加速
+        if isAccelerating {
+            let elapsedTime = currentTime - startTime
+            let progress = min(CGFloat(elapsedTime) / CGFloat(accelerationDuration), 1.0)
+            currentSpeed = initialSpeed + (maxSpeed - initialSpeed) * progress
+            
+            if progress >= 1.0 {
+                isAccelerating = false
+            }
+        }
+        
+        // 计算位移
+        let distance = currentSpeed * CGFloat(deltaTime) * direction.multiplier
+        offset += distance
+        
+        // 循环重置
+        let cycleThreshold = isMiddleReel ? frameCycleWidth * 1.2 : frameCycleWidth * 2
+        
+        if direction == .left {
+            while offset < -cycleThreshold {
+                offset += frameCycleWidth / (isMiddleReel ? 1.5 : 1)
+            }
+        } else {
+            while offset > 0 {
+                offset -= frameCycleWidth
+            }
+        }
+    }
+}
+
+// 胶卷视图
+struct FilmReelView: View {
+    @StateObject private var animationController: FilmAnimationController
+    let zIndex: Double
+    
+    init(frames: [FilmFrame], rotationAngle: Double, verticalOffset: CGFloat, 
+         direction: FilmAnimationController.Direction, isMiddleReel: Bool = false, zIndex: Double = 0) {
+        _animationController = StateObject(wrappedValue: FilmAnimationController(
+            frames: frames,
+            rotationAngle: rotationAngle,
+            verticalOffset: verticalOffset,
+            direction: direction,
+            isMiddleReel: isMiddleReel
+        ))
+        self.zIndex = zIndex
+    }
+    
+    var body: some View {
+        let containerWidth = animationController.frameCycleWidth * 4
+        
+        ZStack {
+            Color.clear
+                .frame(width: containerWidth)
+            
+            HStack(spacing: animationController.spacing) {
+                let repeatCount = animationController.isMiddleReel ? 4 : 3
+                ForEach(Array(repeating: animationController.frames, count: repeatCount).flatMap { $0 }) { frame in
+                    ZStack {
+                        RoundedRectangle(cornerRadius: 4)
+                            .stroke(Color.black, lineWidth: 2)
+                            .background(Color(white: 0.9, opacity: 0.7))
+                        
+                        Group {
+                            if let uiImage = UIImage(named: frame.imageName) {
+                                Image(uiImage: uiImage)
+                                    .resizable()
+                            } else {
+                                Image(systemName: frame.systemImage)
+                                    .resizable()
+                            }
+                        }
+                        .aspectRatio(contentMode: .fit)
+                        .padding(6)
+                        .foregroundColor(animationController.isMiddleReel ? .red : .blue)
+                    }
+                    .frame(width: animationController.frameWidth, height: 150)
+                    .shadow(radius: 3)
+                }
+            }
+            .offset(x: animationController.offset, y: animationController.verticalOffset)
+            .onAppear {
+                animationController.startAnimation()
+            }
+            .onDisappear {
+                animationController.stopAnimation()
+            }
+        }
+        .rotationEffect(.degrees(animationController.rotationAngle))
+        .zIndex(zIndex)
+    }
+}
+
+// 主视图
+struct Box7: View {
+    // 胶卷帧数据
+    private let filmFrames: [FilmFrame] = [
+        FilmFrame(imageName: "frame1", systemImage: "photo"),
+        FilmFrame(imageName: "frame2", systemImage: "camera"),
+        FilmFrame(imageName: "frame3", systemImage: "video"),
+        FilmFrame(imageName: "frame4", systemImage: "movie"),
+        FilmFrame(imageName: "frame5", systemImage: "film"),
+        FilmFrame(imageName: "frame6", systemImage: "photo.on.rectangle"),
+        FilmFrame(imageName: "frame7", systemImage: "photo.circle"),
+        FilmFrame(imageName: "frame8", systemImage: "film.frame")
+    ]
+    
+    var body: some View {
+        ZStack(alignment: .center) {
+            // 上边胶卷
+            FilmReelView(
+                frames: filmFrames,
+                rotationAngle: 6,
+                verticalOffset: -120,
+                direction: .right,
+                zIndex: 1
+            )
+            
+            // 中间胶卷
+            FilmReelView(
+                frames: filmFrames,
+                rotationAngle: 0,
+                verticalOffset: 0,
+                direction: .left,
+                isMiddleReel: true,
+                zIndex: 0
+            )
+            
+            // 下边胶卷
+            FilmReelView(
+                frames: filmFrames,
+                rotationAngle: -6,
+                verticalOffset: 120,
+                direction: .right,
+                zIndex: 2
+            )
+        }
+        .padding(.horizontal, 60)
+        .padding(.vertical, 80)
+        .background(LinearGradient(
+            gradient: Gradient(colors: [.gray.opacity(0.1), .gray.opacity(0.2)]),
+            startPoint: .top,
+            endPoint: .bottom
+        ))
+        .edgesIgnoringSafeArea(.all)
+    }
+}
+
+// 预览
+struct Box7_Previews: PreviewProvider {
+    static var previews: some View {
+        Box7()
+            .previewDevice("iPhone 13")
+    }
+}

wake/View/Welcome/SplashView.swift

@@ -19,7 +19,7 @@ struct SplashView: View {
                 )
                 .edgesIgnoringSafeArea(.all)
                 VStack(spacing: 50) {
-                    FilmAnimation()
+                    Box7()
                 }
                 .padding()
             }