h5基于canvas手势解锁
效果图
源码
(function(){
window.H5lock = function(obj){
this.version=function(){console.log('1.0.0')};
this.author='chason';
var w = document.documentElement.clientWidth || document.body.clientWidth;
var h = document.documentElement.clientHeight || document.body.clientHeight;
this.height = obj.height?obj.height:h;
this.width = obj.width?obj.width:w;
this.bg=obj.bg?obj.bg:"#000";
this.notice=obj.noticeEl;
this.pswEl=obj.pswEl;
this.type=obj.type;
this.position=obj.position?obj.position:{left:0,top:0};
this.savePws=obj.savePws?obj.savePws:function(psw){};
this.lockSuccess=obj.lockSuccess?obj.lockSuccess:function(){};
this.resetPswText=obj.resetPswText?obj.resetPswText:'重置密码';
this.initialNoticel=obj.initialNoticel?obj.initialNoticel:'请绘制解锁图案';
this.chooseType = Number(window.localStorage.getItem('chooseType')) || obj.chooseType;
this.devicePixelRatio = window.devicePixelRatio || 1;
document.querySelector(this.notice).innerHTML=this.initialNoticel;
document.querySelector(this.pswEl).innerHTML=this.resetPswText;
(this.type=='unlock') && (document.querySelector(this.pswEl).style.display='none');
};
H5lock.prototype.drawCle = function(x, y) { // 初始化解锁密码面板 小圆圈
this.ctx.strokeStyle = '#87888a';//密码的点点默认的颜色
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(style) { // 初始化圆心
for (var i = 0 ; i < this.lastPoint.length ; i++) {
this.ctx.fillStyle = style;
this.ctx.beginPath();
this.ctx.arc(this.lastPoint[i].x, this.lastPoint[i].y, this.r / 2.5, 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(style, po, lastPoint) {//style:颜色 解锁轨迹
this.ctx.beginPath();
this.ctx.strokeStyle = style;
this.ctx.lineWidth = 3;
(this.lastPoint[0]) && (this.ctx.moveTo(this.lastPoint[0].x, this.lastPoint[0].y));
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 / (1 + 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 + 2.5 * r,
y: i * 4 * r + 3 * r+5*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)*this.devicePixelRatio,
y: (e.touches[0].clientY - rect.top)*this.devicePixelRatio
};
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('#27AED5');// 每帧花轨迹
this.drawStatusPoint('#27AED5');// 每帧花轨迹
this.drawLine('#27AED5',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.querySelector(this.notice).innerHTML = '密码保存成功';
this.drawStatusPoint('#2CFF26');
this.drawPoint('#2CFF26');
window.localStorage.setItem('passwordxx', JSON.stringify(this.pswObj.spassword));
window.localStorage.setItem('chooseType', this.chooseType);
this.savePws(this.pswObj.spassword)
} else {
document.querySelector(this.notice).innerHTML='两次不一致,重新输入';
this.drawStatusPoint('red');
this.drawPoint('red');
delete this.pswObj.step;
}
} else if (this.pswObj.step == 2) {
if (this.checkPass(this.pswObj.spassword, psw)) {
var title = document.querySelector(this.notice);
title.style.color = "#2CFF26";
title.innerHTML = '解锁成功';
this.drawStatusPoint('#2CFF26');//小点点外圈高亮
this.drawPoint('#2CFF26');
this.drawLine('#2CFF26',this.lastPoint[this.lastPoint.length-1] , this.lastPoint);// 每帧画圆心
this.lockSuccess();
} else if (psw.length < 4) {
this.drawStatusPoint('red');
this.drawPoint('red');
this.drawLine('red',this.lastPoint[this.lastPoint.length-1] , this.lastPoint);// 每帧画圆心
var title = document.querySelector(this.notice);
title.style.color = "red";
title.innerHTML = '请至少连接4个点';
} else {
this.drawStatusPoint('red');
this.drawPoint('red');
this.drawLine('red',this.lastPoint[this.lastPoint.length-1] , this.lastPoint);// 每帧画圆心
var title = document.querySelector(this.notice);
title.style.color = "red";
title.innerHTML = '密码错误,您还可以输入N次';
}
} else {
if(psw.length<4){
document.querySelector(this.notice).innerHTML = '请至少连接4个点';
return;
}
this.pswObj.step = 1;
this.pswObj.fpassword = psw;
document.querySelector(this.notice).innerHTML = '再次输入';
}
}
H5lock.prototype.makeState = function() {
if (this.pswObj.step == 2) {
(this.type=='reset') && (document.querySelector(this.pswEl).style.display = 'block');
var title = document.querySelector(this.notice);
title.style.color = "#87888a";
title.innerHTML = '请解锁';
} else if (this.pswObj.step == 1) {
(this.type=='reset') && (document.querySelector(this.pswEl).style.display = 'none');
} else {
(this.type=='reset') && (document.querySelector(this.pswEl).style.display = 'none');
}
}
H5lock.prototype.setChooseType = function(type){
chooseType = type;
init();
}
H5lock.prototype.updatePassword = function(){
window.localStorage.removeItem('passwordxx');
window.localStorage.removeItem('chooseType');
this.pswObj = {};
document.querySelector(this.notice).innerHTML =this.initialNoticel;
this.reset();
}
H5lock.prototype.initDom = function(){
var wrap = document.createElement('div');
wrap.setAttribute('style','position: absolute;top:0;left:0;right:0;bottom:0;');
var canvas = document.createElement('canvas');
canvas.setAttribute('id','canvas');
canvas.style.cssText = 'background-color:'+this.bg+';position:absolute;top:'+this.position.top+'px;left:'+this.position.left+'px;z-index:1;';
wrap.appendChild(canvas);
var width = this.width;
var height = this.height;
document.body.appendChild(wrap);
// 高清屏锁放
canvas.style.width = width + "px";
canvas.style.height = height + "px";
canvas.height = height * this.devicePixelRatio;
canvas.width = width * this.devicePixelRatio;
}
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();
//判断是type是reset还是unlock
if(this.type=='reset'){
this.updatePassword();
}
}
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);
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();
}, 1000);
}
}, false);
document.querySelector(this.pswEl).addEventListener('click', function(){
self.updatePassword();
});
}
})();
使用方法
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="maximum-scale=1.0,minimum-scale=1.0,user-scalable=0,width=device-width,initial-scale=1.0" />
<title>title</title>
<!-- -->
<style>
#notice{
position: absolute;
top:20vh;
left:0;
width:100%;
z-index: 5;
text-align: center;
}
#reset{
position: absolute;
bottom:15vh;
right:0;
width:100%;
z-index: 5;
text-align: center;
}
</style>
<div id="gesture">
<p id="notice"></p>
<p id="reset"></p>
</div>
</head>
<body>
</body>
<script src="../../../plugin/h5lock/H5lock.js"></script>
<script type="text/javascript">
var opt={
chooseType:3,//必须字段,几排几列
width:414,//canvas宽度,默认100%
height:736,//canvaas高度,默认100%
//canvas位置,默认left:0,top:0,如果你的canvas宽高默认100%,此值可不填
position:{
left:0,
top:0
},
bg:"#000",//canvas背景,默认#000
noticeEl:"#notice",//必须字段:提示的容器,因canvas absolute定位,所以注意层叠关系
pswEl:"#reset",//必须字段:重置密码的容器,因canvas absolute定位,所以注意层叠关系
initialNoticel:"请绘制解锁图案",//提示解锁的文本,默认"请绘制解锁图案"
resetPswText:"重置密码",//重置密码的文本,默认'重置密码',
type:"reset",//必须字段,当前是设置手势还是解锁,reset和unlock
//type='reset'的保存密码后执行,返回密码obj
savePws:function(psw){
alert(JSON.stringify(psw));
},
//解锁成功
lockSuccess:function(){
alert('解锁成功');
}
}
var lock=new H5lock(opt);
lock.init();
</script>
</html>