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 content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta 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>ng仿写支付宝密码框</div> <form novalidate pass-form> <label for="pass"> <input type="tel" autocomplete="off" ng-model="pass" required maxlength="6" /> <div> <span><i>dot</i></span> <span><i>dot</i></span> <span><i>dot</i></span> <span><i>dot</i></span> <span><i>dot</i></span> <span><i>dot</i></span> <div></div> </div> </label> </form> <script src="https://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>