标签：
HTML5实现屏幕手势解锁(转载)
https://github.com/lvming6816077/H5lock
How to use?
<script type="text/javascript" src="src/H5lock.publish.js">
var opt = {
chooseType: 3, // 3 , 4 , 5,
width: 300, // lock wrap width
height: 300, // lock wrap height
container: ‘element‘, // the id attribute of element
inputEnd: function(psw){} // when draw end param is password string
}
var lock = new H5lock(opt);
lock.init();
lock.drawStatusPoint(‘notright‘) // draw the last notright circle
lock.drawStatusPoint(‘right‘) // draw the last right circle
lock.reset() // reset the lock
http://threejs.org/examples/
http://www.inf.usi.ch/phd/wettel/codecity-download.html (JSCity：把源码可视化成建筑物的 JS 库)
http://www.alloyteam.com/2015/07/html5-shi-xian-ping-mu-shou-shi-jie-suo/ (Web前端 腾讯AlloyTeam Blog )
http://top.jobbole.com/22960/(JSCity：把源码可视化成建筑物的 JS 库)
JS:
(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="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();
});
}
})();
HTML5:
<!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>
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原文地址：http://www.cnblogs.com/wupeng88/p/5825837.html
