How to implement picture sliding verification code

This time I will show you how to implement the picture sliding verification code, and what are the precautions for implementing the picture sliding verification code. The following is a practical case, let's take a look.

Picture sliding verification code, the logic is based on the mouse sliding trajectory, coordinate position, calculation of drag speed, etc. to determine whether it is a human operation. Of course, the following code only implements the front-end part and only records the drag coordinate of.

Let’s upload the code first and make a backup record

jquery.lgymove.js

/** 
 * Created by lgy on 2017/10/21. 
 * 图片验证码 
 */ 
(function ($) { 
 $.fn.imgcode = function (options) { 
  //初始化参数 
  var defaults = { 
   callback:"" //回调函数 
  }; 
  var opts = $.extend(defaults, options); 
  return this.each(function () { 
   var $this = $(this);//获取当前对象 
   var html = '<p class="code-k-p">' + 
    '<p class="code_bg"></p>' + 
    '<p class="code-con">' + 
    '<p class="code-img">' + 
    '<p class="code-img-con">' + 
    '<p class="code-mask"><img src="../img/front(1).png"></p>' + 
    '<img src="../img/back(1).png"></p>' + 
    '<p class="code-push"><i class="icon-login-bg icon-w-25 icon-push">刷新</i><span class="code-tip"></span></p>' + 
    '</p>' + 
    '<p class="code-btn">' + 
    '<p class="code-btn-img code-btn-m"></p>' + 
    '<span>按住滑块，拖动完成上方拼图</span>' + 
    '</p></p></p>'; 
   $this.html(html); 
 
   //定义拖动参数 
   var $pMove = $(this).find(".code-btn-img"); //拖动按钮 
   var $pWrap = $(this).find(".code-btn");//鼠标可拖拽区域 
   var mX = 0, mY = 0;//定义鼠标X轴Y轴 
   var dX = 0, dY = 0;//定义滑动区域左、上位置 
   var isDown = false;//mousedown标记 
   if(document.attachEvent) {//ie的事件监听，拖拽p时禁止选中内容，firefox与chrome已在css中设置过-moz-user-select: none; -webkit-user-select: none; 
    $pMove[0].attachEvent('onselectstart', function() { 
     return false; 
    }); 
   } 
   //按钮拖动事件 
   $pMove.on({ 
    mousedown: function (e) { 
     //清除提示信息 
     $this.find(".code-tip").html(""); 
     var event = e || window.event; 
     mX = event.pageX; 
     dX = $pWrap.offset().left; 
     dY = $pWrap.offset().top; 
     isDown = true;//鼠标拖拽启 
     $(this).addClass("active"); 
     //修改按钮阴影 
     $pMove.css({"box-shadow":"0 0 8px #666"}); 
    } 
   }); 
   //鼠标点击松手事件 
   $(document).mouseup(function (e) { 
    var lastX = $this.find(".code-mask").offset().left - dX - 1; 
    isDown = false;//鼠标拖拽启 
    $pMove.removeClass("active"); 
    //还原按钮阴影 
    $pMove.css({"box-shadow":"0 0 3px #ccc"}); 
    checkcode(lastX); 
   }); 
   //滑动事件 
   $pWrap.mousemove(function (event) { 
    var event = event || window.event; 
    var x = event.pageX;//鼠标滑动时的X轴 
    if (isDown) { 
     if(x>(dX+30) && x<dX+$(this).width()-20){ 
      $pMove.css({"left": (x - dX - 20) + "px"});//p动态位置赋值 
      $this.find(".code-mask").css({"left": (x - dX-30) + "px"}); 
     } 
    } 
   }); 
   //验证数据 
   function checkcode(code){ 
    var iscur=false; 
    //模拟ajax 
    setTimeout(function(){ 
     if(iscur){ 
      checkcoderesult(1,"验证通过"); 
      $this.find(".code-k-p").hide(); 
      opts.callback({code:1000,msg:"验证通过",msgcode:"23dfdf123"}); 
     }else{ 
      $pMove.addClass("error"); 
      checkcoderesult(0,"验证不通过"); 
      opts.callback({code:1001,msg:"验证不通过"}); 
      setTimeout(function() { 
       $pMove.removeClass("error"); 
       $this.find(".code-mask").animate({"left":"0px"},200); 
       $pMove.animate({"left": "10px"},200); 
      },400); 
     } 
    },500) 
   } 
   //验证结果 
   function checkcoderesult(i,txt){ 
    if(i==0){ 
     $this.find(".code-tip").addClass("code-tip-red"); 
    }else{ 
     $this.find(".code-tip").addClass("code-tip-green"); 
    } 
    $this.find(".code-tip").html(txt); 
   } 
  }) 
 } 
})(jQuery);

css part:

.code_bg{ 
 position: fixed; 
 top:0; 
 left: 0; 
 right:0; 
 bottom:0; 
 background-color: rgba(0,0,0,.5); 
 z-index: 99; 
} 
.icon-login-bg{ 
 background-image: url(../img/icon/loginicon.png); 
 background-repeat: no-repeat; 
} 
.code-con{ 
 position: absolute; 
 top:100px; 
 width: 320px; 
 left: 50%; 
 margin-left: -160px; 
 background-color: #fff; 
 z-index: 100; 
 -moz-user-select: none; 
 -webkit-user-select: none; 
} 
.code-img{ 
 margin: 5px 5px; 
 padding: 5px 5px; 
 background-color: #f5f6f7; 
} 
.code-img img{ 
 display: block; 
} 
.icon-w-25{ 
 display: inline-block; 
 width: 25px; 
 height: 25px; 
 text-indent: -9999px; 
} 
.icon-push{ 
 cursor: pointer; 
 background-position: -149px -95px; 
} 
.code-push{ 
 height: 25px; 
} 
.code-btn{ 
 position: relative; 
 height: 30px; 
 text-align: center; 
 color: #999; 
 margin: 10px 10px; 
 box-sizing: border-box; 
 background-color: #f5f6f7; 
 border-radius: 15px; 
 border: 1px solid #e1e1e1; 
} 
.code-btn-m{ 
 position: absolute; 
 width: 40px; 
 height: 40px; 
 border-radius: 50%; 
 background-color: #f5f6f7; 
 border: 1px solid #e1e1e1; 
 z-index: 5; 
 top:-8px; 
 left: 10px; 
 box-shadow: 0 0 3px #ccc; 
 cursor: pointer; 
 background-position: -63px 10px; 
} 
.code-btn-img{ 
 background-image:url(../img/icon/codejt.png); 
 background-repeat: no-repeat; 
} 
.code-btn-img.active{ 
 background-position: -134px 10px; 
} 
.code-btn-img.error{ 
 background-position: 8px 10px; 
} 
.code-img-con{ 
 position: relative; 
} 
.code-mask{ 
 position: absolute; 
 top:0; 
 left: 0; 
 z-index: 10; 
} 
.code-tip{ 
 padding-left: 10px; 
 font-size: 12px; 
 color: #999; 
} 
.code-tip-red{ 
 color: red; 
} 
.code-tip-green{ 
 color: green; 
}

HTML part:

<p id="imgscode"></p> 
<script> 
$("#imgscode").imgcode(); 
</script>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Introduction to the use of the open source JS plug-in framework MinimaJS

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The above is the detailed content of How to implement picture sliding verification code. For more information, please follow other related articles on the PHP Chinese website!