这篇文章主要介绍“layui如何实现登陆界面验证码”,在日常操作中,相信很多人在layui如何实现登陆界面验证码问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”layui如何实现登陆界面验证码”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
效果图:
html:
<div class="layui-form-item"> <div class="layui-col-xs6" > <input type="text" value="" placeholder="请输入验证码(不区分大小写)" class="input-val"> <canvas id="canvas" width="100" height="30"></canvas> </div> <div> <input type="button" value="登录" class="layui-btn layui-btn-fluid" lay-submit lay-filter="login"> </div> </div>
接下来就是JS:
var show_num=[]; $(function() { draw(show_num); $("#canvas").on('click',function() { draw(show_num); }) });
再调用的两个函数:
function draw(show_num) { var canvas_width = $('#canvas').width(); var canvas_height = $('#canvas').height(); var canvas = document.getElementById("canvas");//获取到canvas的对象,演员 var context = canvas.getContext("2d");//获取到canvas画图的环境,演员表演的舞台 canvas.width = canvas_width; canvas.height = canvas_height; var sCode = "A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0"; var aCode = sCode.split(","); var aLength = aCode.length;//获取到数组的长度 for (var i = 0; i <= 3; i++) { var j = Math.floor(Math.random() * aLength);//获取到随机的索引值 var deg = Math.random() * 30 * Math.PI / 180;//产生0~30之间的随机弧度 var txt = aCode[j];//得到随机的一个内容 show_num[i] = txt.toLowerCase(); var x = 10 + i * 20;//文字在canvas上的x坐标 var y = 20 + Math.random() * 8;//文字在canvas上的y坐标 context.font = "bold 23px 微软雅黑"; context.translate(x, y); context.rotate(deg); context.fillStyle = randomColor(); context.fillText(txt, 0, 0); context.rotate(-deg); context.translate(-x, -y); } for (var i = 0; i <= 5; i++) { //验证码上显示线条 context.strokeStyle = randomColor(); context.beginPath(); context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height); context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height); context.stroke(); } for (var i = 0; i <= 30; i++) { //验证码上显示小点 context.strokeStyle = randomColor(); context.beginPath(); var x = Math.random() * canvas_width; var y = Math.random() * canvas_height; context.moveTo(x, y); context.lineTo(x + 1, y + 1); context.stroke(); } } function randomColor() {//得到随机的颜色值 var r = Math.floor(Math.random() * 256); var g = Math.floor(Math.random() * 256); var b = Math.floor(Math.random() * 256); return "rgb(" + r + "," + g + "," + b + ")"; }
样式得自己根据项目调配噢 下面是我的样式:
<style> .code { width: 100%; margin: 0 auto; } .input-val { width: 63%; background: #ffffff; height: 2.8rem; padding: 0 2%; border-radius: 5px; border: none; border: 1px solid rgba(0,0,0,.2); font-size: 0.9rem; } #canvas { float: right; display: inline-block; border: 1px solid #ccc; border-radius: 5px; cursor: pointer; }</style>
到此,关于“layui如何实现登陆界面验证码”的学习就结束了,希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习,快去试试吧!若想继续学习更多相关知识,请继续关注编程网网站,小编会继续努力为大家带来更多实用的文章!