微信小程序滑块验证方法

如图：

滑块验证组件

puzzleVerify

目录

index.wxml

<!-- 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>

index.wxss

/* 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:005px 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:008px 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:0010px 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;}

index.js

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 =thisthis.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 =thisvar 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 =thisvar cliextX;var maxX =this.data.canvas_width -60if(that.data.slide_clientX <1){
                that.data.slide_status =0returnfalse}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);},}})

index.json

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

父组件调用滑块

json

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

wxml

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

js

    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(){}

滑块含有静态图片，完整代码和静态图片资源已上传链接: 微信小程序滑块验证源码.

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