微信小程序滑块验证方法

<!-- 滑动验证弹窗 -->
<view class="slide_model" wx:if="{{slidebel}}">
  <view class="slide_wrapper">
    <!-- 拼图图片部分 -->
    <view class="canvas_img" id="canvas_img">
      <!-- 背景图片 -->
      <canvas style="width: {{canvas_width}}px; height: {{canvas_width * 13 / 28}}px;" canvas-id="firstCanvas" id="firstCanvas"></canvas>
      <!-- 被抠方块 -->
      <cover-view class="canvas_view" style="left:{{canfile_x}}px;top:{{canfile_y}}px;"></cover-view>
      <!-- 可移动空格 -->
      <cover-image class="canfile_image"
        style="top:{{canfile_y}}px;left:{{slide_clientX > canvas_width-50 ? canvas_width-50 : slide_clientX}}px;"
        src="{{canfile_image}}"></cover-image>
    </view>
    <!-- 滑块 -->
    <view class="canvas_slide">
      <view class="canvas_width"
        style="width:{{slide_clientX > canvas_width-50?canvas_width-50:slide_clientX}}px;{{slide_status == 2?'background:#52CCBA;':''}}{{slide_status == 3?'background:#F57A7A;':''}}">
      </view>
      <view class="canvas_kus" bindtouchstart="slide_start" bindtouchmove="slide_hmove" bindtouchend="slide_chend"
        style="left:{{slide_clientX > canvas_width-50?canvas_width-50:slide_clientX}}px; {{slide_status == 0?'color: #333;':''}} {{slide_status == 1?'background:#1991FA;':''}} {{slide_status == 2?'background:#52CCBA;':''}} {{slide_status == 3?'background:#F57A7A;':''}}">
        <view wx:if="{{slide_status < 2}}"
          style="background-image: {{slide_status==0?'url(/imgs/puzzle-uncheck.png)':'url(/imgs/puzzle-uncheck2.png)'}}">
        </view>
        <view wx:if="{{slide_status == 2}}">
          <image src="/imgs/puzzle-checked.png" mode="aspectFit"
            style="width:40rpx;height:40rpx;margin-top:10px;">
          </image>
        </view>
        <view wx:if="{{slide_status == 3}}">
          <image src="/imgs/puzzle-fail.png" mode="aspectFit"
            style="width:40rpx;height:40rpx;margin-top:10px;">
          </image>
        </view>
      </view>
      <view wx:if="{{slide_status == 0 || slide_status == 1}}">拖动左边滑块完成上方拼图</view>
    </view>
    <!-- 底部按钮 -->
    <view class="canvas_guil">
      <image bindtap="visidlisd" class="footer-icon" src="/imgs/puzzle-close.png"
        style="width: 50rpx; height: 50rpx;"></image>
      <image bindtap="slide_tap" class="footer-icon" src="/imgs/puzzle-fresh.png"
        style="width: 48rpx; height: 48rpx;"></image>
    </view>
  </view>
</view>

/* 拼图滑动验证 */
.slide_model {
  width: 100%;
  height: 100vh;
  z-index: 999;
  position: fixed;
  left: 0;
  top: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.slide_wrapper {
  float: left;
  z-index: 1;
  position: relative;
  width: 90%;
  background-color: #fff;
}
.canvas_img {
  width: 90%;
  min-height: 150px;
  position: relative;
  margin: 25rpx auto 0;
}
#firstCanvas {
  z-index: 1 !important;
  width: 100%;
  height: 100%;
}
/* 被抠的空格 */
.canvas_view {
  width: 50px;
  height: 50px;
  position: absolute;
  background: rgba(0, 0, 0, 0.6);
  z-index: 2;
  box-shadow: 0 0 5px 2px rgba(255, 255, 255, 0.5);
}
/* 移动的空格 */
.canfile_image {
  width: 50px;
  height: 50px;
  position: absolute;
  left: 0;
  z-index: 3;
  box-shadow: 0px 0px 15px rgba(0, 0, 0, 0.8);
  box-sizing: border-box;
}
.canfile_image::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  box-shadow: 0 0 8px 5px rgba(255, 255, 255, 0.8) inset;
}
.canvas_slide {
  width: 90%;
  height: 45px;
  background: #eee;
  text-align: center;
  line-height: 80rpx;
  margin: 0 auto;
  position: relative;
  font-size: 26rpx;
}
/* 滑条上滑块经过的部分 */
.canvas_width {
  position: absolute;
  left: 0;
  top: 0;
  height: 45px;
  background-color: #1991FA;
  width: 0;
  border-top: 1px solid #ddd;
  border-bottom: 1px solid #ddd;
}
/* 滑块 */
.canvas_kus {
  width: 48px;
  height: 45px;
  background-color: #fff;
  font-size: 36rpx;
  font-weight: 700;
  position: absolute;
  left: 0;
  top: 0;
  border: 1px solid #ddd;
  color: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}
.canvas_kus>view {
  width: 100%;
  height: 100%;
  background-position: center;
  background-size: 50% 40%;
  background-repeat: no-repeat;
}
/* 底部按钮位置 */
.canvas_guil {
  width: 100%;
  border-top: 1px solid #f4f4f4;
  height: 100rpx;
  display: flex;
  align-items: center;
  float: left;
  font-size: 30rpx;
  color: #666;
}
.canvas_guil>image {
  margin-left: 30rpx;
}

Component({
  /**
   * 组件的属性列表
   */
  properties: {
    sildeBlockCont: {   //接受父组件值
      type: String
    }
  },
  /**
   * 组件的初始数据
   */
  data: {
    canvas_width: 0,
    slidebel: false, //滑动弹窗
    canfile_image: '', //裁剪图片
    canfile_x: '', //被抠方块的水平位置
    canfile_y: '', //被抠方块的垂直位置
    slide_clientX: 0, //移动位置
    slide_status: 0, //0 停止操作   1 触发长按   2 正确   3 错误
  },
  /**
   * 组件的方法列表
   */
  methods: {
    // 弹窗
    visidlisd(e) {
      var that = this
      this.setData({
        slidebel: !this.data.slidebel
      })
      if (this.data.slidebel) {
        if (this.data.canvas_width != 0) {
          this.slide_tap()
          return
        }
        wx.nextTick(() => {
          let query = this.createSelectorQuery()
          query.select('#canvas_img').boundingClientRect(function (rect) {
            that.setData({
              canvas_width: rect.width
            })
            that.slide_tap()
          }).exec()
        })
      }
    },
    // 画布
    slide_tap(e) {
      var that = this
      var imgIndex = Math.round(Math.random() * 13 + 1)
      that.setData({
        canfile_x: Math.round(Math.random() * (this.data.canvas_width - 120) + 60),
        canfile_y: Math.round(Math.random() * (this.data.canvas_width * 13 / 28 - 60)),
        canfile_image: ''
      })
      setTimeout(function () {
        var context = wx.createCanvasContext('firstCanvas', that)
        context.width = that.data.canvas_width
        context.height = that.data.canvas_width * 13 / 28
        //  /imgs/puzzle-bg-${imgIndex}.jpg  为滑块背景图 从静态资源获取  如从接口获取可从that.properties.properties拿
        context.drawImage(`/imgs/puzzle-bg-${imgIndex}.jpg`, 0, 0, context.width, context.height)
        context.draw(false, (() => {
          wx.canvasToTempFilePath({
            x: that.data.canfile_x,
            y: that.data.canfile_y,
            width: 50,
            height: 50,
            canvasId: 'firstCanvas',
            success: function (res) {
              that.setData({
                canfile_image: res.tempFilePath
              })
            }
          }, that);
        }))
      }, 50)
    },
    // 滑动开始
    slide_start(e) {
      this.setData({
        slide_status: 1
      })
    },
    // 滑动中
    slide_hmove(e) {
      this.setData({
        slide_clientX: (e.touches[0].clientX - 60) < 1 ? 0 : (e.touches[0].clientX - 60)
      })
    },
    //滑动结束
    slide_chend(e) {
      var that = this
      var cliextX;
      var maxX = this.data.canvas_width - 60
      if (that.data.slide_clientX < 1) {
        that.data.slide_status = 0
        return false
      }
      if (that.data.slide_clientX > maxX) {
        cliextX = maxX
      } else {
        cliextX = that.data.slide_clientX
      }
      if (((that.data.canfile_x + 5) > cliextX) && ((that.data.canfile_x - 5) < cliextX)) {
        that.setData({
          slide_status: 2,
          slide_clientX: that.data.canfile_x,
        })
        setTimeout(function () {
          that.setData({
            slidebel: false,
          })
        }, 500)
        wx.showToast({
          icon: 'success',
          title: '验证成功',
        })
        that.triggerEvent('puzzleVerify')
      } else {
        that.setData({
          slide_status: 3,
        })
      }
      setTimeout(function () {
        that.setData({
          slide_status: 0,
          slide_clientX: 0,
        })
      }, 500)
    },
  },
  lifetimes: {
    created() {
      // 在组件实例刚刚被创建时执行
    },
    ready() {
      // 在组件在视图层布局完成后执行
      // console.log(this.properties.sildeBlockCont);
    },
  }
})

{
  "component": true,
  "usingComponents": {}
}

  "usingComponents": {
    "puzzleVerify": "/components/puzzleVerify/index"
  }

<button  bindtap="getCode"></button>
<puzzleVerify id="puzzleVerify" bind:puzzleVerify="countDown" sildeBlockCont="{{sildeBlockCont}}"></puzzleVerify>

  data: {
    sildeBlockCont: '', //滑块背景图
  },
  onReady: function () {
    this.puzzleVerify = this.selectComponent("#puzzleVerify")
  },
  getCode() {
    this.puzzleVerify.visidlisd()
  },
  // 滑块验证成功操作
  countDown() {}