uniapp中如何实现滑动解锁和手势密码

<view class="slider" @touchstart="touchStart" @touchmove="touchMove" @touchend="touchEnd"></view>

data() {
  return {
    startX: 0, // 滑块开始滑动的初始位置
    moveX: 0,  // 滑块滑动的距离
    unlocked: false // 是否解锁成功的标志
  }
}

methods: {
  touchStart(event) {
    this.startX = event.touches[0].clientX
  },
  touchMove(event) {
    this.moveX = event.touches[0].clientX - this.startX
    // 根据滑块的滑动距离判断是否解锁成功
    if (this.moveX >= 80) {
      this.unlocked = true
    }
  },
  touchEnd() {
    // 根据解锁成功标志判断是否跳转到解锁成功页面
    if (this.unlocked) {
      uni.navigateTo({
        url: '/pages/unlocked/unlocked'
      })
    }
  }
}

.slider {
  width: 300rpx;
  height: 100rpx;
  background-color: #ccc;
  border-radius: 50rpx;
}

<canvas id="canvas" @touchstart="touchStart" @touchmove="touchMove" @touchend="touchEnd"></canvas>

data() {
  return {
    ctx: null,   // canvas上下文
    startX: 0,   // 手指触摸的初始位置
    startY: 0,
    points: [],  // 绘制路径所需的所有点
    password: '' // 用户设置的手势密码
  }
}

onLoad() {
  // 获取canvas上下文
  this.ctx = uni.createCanvasContext('canvas', this)
}

methods: {
  touchStart(event) {
    this.startX = event.touches[0].clientX
    this.startY = event.touches[0].clientY

    // 清除之前的绘制路径
    this.points = []
  },
  touchMove(event) {
    let moveX = event.touches[0].clientX - this.startX
    let moveY = event.touches[0].clientY - this.startY

    // 更新绘制路径的点
    this.points.push({x: moveX, y: moveY})

    this.ctx.clearRect(0, 0, 300, 300) // 清除canvas
    this.drawGesture() // 绘制手势路径
  },
  touchEnd() {
    // 将绘制路径转换成密码
    this.password = this.pointsToString(this.points)
    console.log('设置的手势密码为：' + this.password)
  },
  drawGesture() {
    this.ctx.beginPath()
    this.points.forEach((point, index) => {
      if (index === 0) {
        this.ctx.moveTo(point.x, point.y)
      } else {
        this.ctx.lineTo(point.x, point.y)
      }
    })
    this.ctx.stroke()
    this.ctx.closePath()
    this.ctx.draw()
  },
  pointsToString(points) {
    return points.map(point => {
      return Math.floor((point.x + 150) / 100) + Math.floor((point.y + 150) / 100) * 3 + 1
    }).join('')
  }
}

canvas {
  width: 300rpx;
  height: 300rpx;
  background-color: #eee;
}