angular仿支付宝密码框输入效果

项目需求，使用ng写一个密码框格子支付模块，一开始使用一个input+letter-spacing来分割字符，但是发现间距非常不好控制，随着字符的输入文本框字符串间距还会自动调整。最终从网上查找到一款jq仿支付宝密码输入框，于是我模仿编写了个指令模块。

效果如下：

完整代码如下：

<!DOCTYPE html>
<html>
<head lang="en">
 <meta charset="UTF-8">
 <meta name="viewport"
    content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
 <meta name="format-detection" content="telephone=no"/>
 <title>使用ng仿写支付宝密码框</title>
 <style>
  *{ margin: 0; padding: 0;}
  .t{ margin-left: 100px;}
  .pass-form{position:relative;top:20px; left: 50px; width:100%;}
  .pass-form .pass-input{position:absolute;top:0;height:75px;line-height:75px;font-size:14px;color:#000;opacity:0;box-shadow:none}
  .pass-form .pass-border-box{position:absolute;top:0;font-size:0}
  .pass-form .pass-border-box .faguang{position:absolute;top:0;left:0;z-index:9;box-shadow:0 0 8px rgba(60,100,100,.6);width:75px;height:75px;background:#fff;opacity:0}
  .pass-form .pass-border-box .pass-border{display:inline-block;position:relative;z-index:10;width:75px;height:75px;border:solid 1px #dcdcdc;border-left:none;-webkit-box-sizing:border-box;box-sizing:border-box}
  .pass-form .pass-border-box .pass-border:first-child{border-left:solid 1px #dcdcdc}
  .pass-form .pass-border-box .pass-border.active{background:url(../img/icons/icon_guangbiao.gif) no-repeat center center #fff}
  .pass-form .pass-border-box .pass-border i{display:block;margin:0 auto;margin-top:22px;width:20px;height:20px;border-radius:100%}
 </style>
</head>
<body ng-app="demo" ng-controller="pageCtrl"> 

<div class="t">ng仿写支付宝密码框</div> 

<form class="pass-form" name="pass_form" novalidate pass-form>
 <label for="pass">
  <input class="pass-input Jpass" type="tel" name="pass" id="pass" autocomplete="off" ng-model="pass" required maxlength="6" /> 

  <div class="pass-border-box">
   <span class="pass-border"><i>dot</i></span>
   <span class="pass-border"><i>dot</i></span>
   <span class="pass-border"><i>dot</i></span>
   <span class="pass-border"><i>dot</i></span>
   <span class="pass-border"><i>dot</i></span>
   <span class="pass-border"><i>dot</i></span>
   <div class="faguang Jfaguang"></div>
  </div>
 </label>
</form>
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
<script>
 var app=angular.module('demo', []);
 app.controller('pageCtrl', function($scope, $interval, $http, $q){
  $scope.pass='';
//  $interval(function(){
//   console.log('定时检查：'+$scope.pass);
//  }, 5000);
 })
  .directive('passForm', function($http){
   return {
    restrict: 'EA',
    link: function(scope, ele, attr){
     var inputDom=angular.element(ele[0].querySelector('.Jpass'));//密码框
     var spanDoms=ele.find('span');//光标span
     var faguang=angular.element(ele[0].querySelector('.Jfaguang'));//发光外框
     var that=this;
     inputDom.on('focus blur keyup', function(e){
      e=e? e : window.event;
      e.stopPropagation(); 

      console.log('value len:'+this.value.length);
      console.log(e.type);
      if(e.type==='focus'){
       var _currFocusInputLen=this.value.length===6? 5 : this.value.length;
       spanDoms.eq(_currFocusInputLen).addClass('active');
       faguang.css({left: _currFocusInputLen * 75+'px', opacity: 1});
      }else if(e.type==='blur'){
       var _currBlurInputLen = this.value.length;
       spanDoms.eq(_currBlurInputLen).removeClass('active');
       faguang.css({opacity: 0});
      }else if(e.type==='keyup'){
       //console.log(this.value);
       //键盘上的数字键按下才可以输入
       if(e.keyCode == 8 || (e.keyCode >= 48 && e.keyCode <= 57) || (e.keyCode >= 96 && e.keyCode <= 105)){
        var curInputLen = this.value.length;//输入的文本内容长度
        for (var j = 0; j < 6; j++) {
         spanDoms.eq(j).removeClass('active');
         spanDoms.eq(curInputLen).addClass('active');
         spanDoms.eq(curInputLen - 1).next().find('i').css({backgroundColor: 'transparent'});
         spanDoms.eq(curInputLen - 1).find('i').css({backgroundColor: '#000'});
         faguang.css({
          left: curInputLen * 75 + 'px'
         });
        }
        if (curInputLen === 0) {
         spanDoms.find('i').css({backgroundColor: 'transparent'});
        }
        if (curInputLen === 6) {
         spanDoms.eq(5).addClass('active');
         faguang.css({
          left: '375px'
         });
         //直接发起密码验证
         var doSubmitCallback=function(){
          scope.pass='';
          spanDoms.find('i').css({backgroundColor: 'transparent'});
          spanDoms.removeClass('active').eq(0).addClass('active');
          faguang.css({
           left: '0'
          });
         };
//         $http.get('http://xxxx/test.php?pass='+this.value)
//          .success(function(res){
//           console.log(res);
//           if(res.status){
//            doSubmitCallback();
//            console.log(that.value+'-----');
//           }else{
//            doSubmitCallback(); 

//           }
//          });
        }
       }else{
        this.value = this.value.replace(/\D/g,'');
       } 

      }
     });
    }
   }
  });
</script>
</body>
</html> 

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