(function(){window.H5lock = function(obj){this.height = obj.height;this.width = obj.width;this.chooseType = Number(window.localStorage.getItem('chooseType')) || obj.chooseType;};H5lock.prototype.drawCle = function(x, y) { // 初始化解锁密码面板this.ctx.strokeStyle = '#CFE6FF';this.ctx.lineWidth = 2;this.ctx.beginPath();this.ctx.arc(x, y, this.r, 0, Math.PI * 2, true);this.ctx.closePath();this.ctx.stroke();}H5lock.prototype.drawPoint = function() { // 初始化圆心for (var i = 0 ; i < this.lastPoint.length ; i++) {this.ctx.fillStyle = '#CFE6FF';this.ctx.beginPath();this.ctx.arc(this.lastPoint[i].x, this.lastPoint[i].y, this.r / 2, 0, Math.PI * 2, true);this.ctx.closePath();this.ctx.fill();}}H5lock.prototype.drawStatusPoint = function(type) { // 初始化状态线条for (var i = 0 ; i < this.lastPoint.length ; i++) {this.ctx.strokeStyle = type;this.ctx.beginPath();this.ctx.arc(this.lastPoint[i].x, this.lastPoint[i].y, this.r, 0, Math.PI * 2, true);this.ctx.closePath();this.ctx.stroke();}}H5lock.prototype.drawLine = function(po, lastPoint) {// 解锁轨迹this.ctx.beginPath();this.ctx.lineWidth = 3;this.ctx.moveTo(this.lastPoint[0].x, this.lastPoint[0].y);console.log(this.lastPoint.length);for (var i = 1 ; i < this.lastPoint.length ; i++) {this.ctx.lineTo(this.lastPoint[i].x, this.lastPoint[i].y);}this.ctx.lineTo(po.x, po.y);this.ctx.stroke();this.ctx.closePath();}H5lock.prototype.createCircle = function() {// 创建解锁点的坐标，根据canvas的大小来平均分配半径var n = this.chooseType;var count = 0;this.r = this.ctx.canvas.width / (2 + 4 * n);// 公式计算this.lastPoint = [];this.arr = [];this.restPoint = [];var r = this.r;for (var i = 0 ; i < n ; i++) {for (var j = 0 ; j < n ; j++) {count++;var obj = {x: j * 4 * r + 3 * r,y: i * 4 * r + 3 * r,index: count};this.arr.push(obj);this.restPoint.push(obj);}}this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);for (var i = 0 ; i < this.arr.length ; i++) {this.drawCle(this.arr[i].x, this.arr[i].y);}//return arr;}H5lock.prototype.getPosition = function(e) {// 获取touch点相对于canvas的坐标var rect = e.currentTarget.getBoundingClientRect();var po = {x: e.touches[0].clientX - rect.left,y: e.touches[0].clientY - rect.top};return po;}H5lock.prototype.update = function(po) {// 核心变换方法在touchmove时候调用this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);for (var i = 0 ; i < this.arr.length ; i++) { // 每帧先把面板画出来this.drawCle(this.arr[i].x, this.arr[i].y);}this.drawPoint(this.lastPoint);// 每帧花轨迹this.drawLine(po , this.lastPoint);// 每帧画圆心for (var i = 0 ; i < this.restPoint.length ; i++) {if (Math.abs(po.x - this.restPoint[i].x) < this.r && Math.abs(po.y - this.restPoint[i].y) < this.r) {this.drawPoint(this.restPoint[i].x, this.restPoint[i].y);this.lastPoint.push(this.restPoint[i]);this.restPoint.splice(i, 1);break;}}}H5lock.prototype.checkPass = function(psw1, psw2) {// 检测密码var p1 = '',p2 = '';for (var i = 0 ; i < psw1.length ; i++) {p1 += psw1[i].index + psw1[i].index;}for (var i = 0 ; i < psw2.length ; i++) {p2 += psw2[i].index + psw2[i].index;}return p1 === p2;}H5lock.prototype.storePass = function(psw) {// touchend结束之后对密码和状态的处理if (this.pswObj.step == 1) {if (this.checkPass(this.pswObj.fpassword, psw)) {this.pswObj.step = 2;this.pswObj.spassword = psw;document.getElementById('title').innerHTML = '密码保存成功';this.drawStatusPoint('#2CFF26');window.localStorage.setItem('passwordxx', JSON.stringify(this.pswObj.spassword));window.localStorage.setItem('chooseType', this.chooseType);} else {document.getElementById('title').innerHTML = '两次不一致，重新输入';this.drawStatusPoint('red');delete this.pswObj.step;}} else if (this.pswObj.step == 2) {if (this.checkPass(this.pswObj.spassword, psw)) {document.getElementById('title').innerHTML = '解锁成功';this.drawStatusPoint('#2CFF26');} else {this.drawStatusPoint('red');document.getElementById('title').innerHTML = '解锁失败';}} else {this.pswObj.step = 1;this.pswObj.fpassword = psw;document.getElementById('title').innerHTML = '再次输入';}}H5lock.prototype.makeState = function() {if (this.pswObj.step == 2) {document.getElementById('updatePassword').style.display = 'block';//document.getElementById('chooseType').style.display = 'none';document.getElementById('title').innerHTML = '请解锁';} else if (this.pswObj.step == 1) {//document.getElementById('chooseType').style.display = 'none';document.getElementById('updatePassword').style.display = 'none';} else {document.getElementById('updatePassword').style.display = 'none';//document.getElementById('chooseType').style.display = 'block';}}H5lock.prototype.setChooseType = function(type){chooseType = type;init();}H5lock.prototype.updatePassword = function(){window.localStorage.removeItem('passwordxx');window.localStorage.removeItem('chooseType');this.pswObj = {};document.getElementById('title').innerHTML = '绘制解锁图案';this.reset();}H5lock.prototype.initDom = function(){var wrap = document.createElement('div');var str = '<h4 id="title" class="title">绘制解锁图案</h4>'+'<a id="updatePassword" style="position: absolute;right: 5px;top: 5px;color:#fff;font-size: 10px;display:none;">重置密码</a>'+'<canvas id="canvas" width="300" height="300" style="background-color: #305066;display: inline-block;margin-top: 15px;"></canvas>';wrap.setAttribute('style','position: absolute;top:0;left:0;right:0;bottom:0;');wrap.innerHTML = str;document.body.appendChild(wrap);}H5lock.prototype.init = function() {this.initDom();this.pswObj = window.localStorage.getItem('passwordxx') ? {step: 2,spassword: JSON.parse(window.localStorage.getItem('passwordxx'))} : {};this.lastPoint = [];this.makeState();this.touchFlag = false;this.canvas = document.getElementById('canvas');this.ctx = this.canvas.getContext('2d');this.createCircle();this.bindEvent();}H5lock.prototype.reset = function() {this.makeState();this.createCircle();}H5lock.prototype.bindEvent = function() {var self = this;this.canvas.addEventListener("touchstart", function (e) {e.preventDefault();// 某些android 的 touchmove不宜触发 所以增加此行代码var po = self.getPosition(e);console.log(po);for (var i = 0 ; i < self.arr.length ; i++) {if (Math.abs(po.x - self.arr[i].x) < self.r && Math.abs(po.y - self.arr[i].y) < self.r) {self.touchFlag = true;self.drawPoint(self.arr[i].x,self.arr[i].y);self.lastPoint.push(self.arr[i]);self.restPoint.splice(i,1);break;}}}, false);this.canvas.addEventListener("touchmove", function (e) {if (self.touchFlag) {self.update(self.getPosition(e));}}, false);this.canvas.addEventListener("touchend", function (e) {if (self.touchFlag) {self.touchFlag = false;self.storePass(self.lastPoint);setTimeout(function(){self.reset();}, 300);}}, false);document.addEventListener('touchmove', function(e){e.preventDefault();},false);document.getElementById('updatePassword').addEventListener('click', function(){self.updatePassword();});}
})();

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no"><title>H5lock</title><style type="text/css">body {text-align: center;background-color: #305066;}.title {color: #22C3AA;}</style></head>
<body>
<script type="text/javascript" src="javascripts/H5lock.js"></script>
<script type="text/javascript">
//http://www.nihaoshijie.com.cn/index.php/archives/537http://www.nihaoshijie.com.cn/index.php/archives/537/*
http://top.jobbole.com/22960/http://threejs.org/examples/
http://www.inf.usi.ch/phd/wettel/codecity-download.html
https://github.com/lvming6816077/H5lock
http://www.alloyteam.com/2015/07/html5-shi-xian-ping-mu-shou-shi-jie-suo/*/
new H5lock({chooseType: 3
}).init();
</script>
</body>
</html>