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HTML5贯彻显示屏手势解锁(转发)

2019年3月9日 - jQuery

HTML5兑现显示屏手势解锁

2015/07/18 · HTML5 · 1
评论
·
手势解锁

原稿出处:
AlloyTeam   

意义体现

manbetx2.0手机版 1

达成原理 利用HTML5的canvas,将解锁的范畴划出,利用touch事件解锁那一个规模,直接看代码。

JavaScript

function createCircle() {//
创制解锁点的坐标,依照canvas的高低来平均分配半径 var n = chooseType;//
画出n*n的矩阵 lastPoint = []; arr = []; restPoint = []; r =
ctx.canvas.width / (2 + 4 * n);// 公式总计 半径和canvas的分寸有关 for
(var i = 0 ; i < n ; i++) { for (var j = 0 ; j < n ; j++) {
arr.push({ x: j * 4 *manbetx2.0手机版, r + 3 * r, y: i * 4 * r + 3 * r });
restPoint.push({ x: j * 4 * r + 3 * r, y: i * 4 * r + 3 * r }); }
} //return arr; }

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function createCircle() {// 创建解锁点的坐标,根据canvas的大小来平均分配半径
 
        var n = chooseType;// 画出n*n的矩阵
        lastPoint = [];
        arr = [];
        restPoint = [];
        r = ctx.canvas.width / (2 + 4 * n);// 公式计算 半径和canvas的大小有关
        for (var i = 0 ; i < n ; i++) {
            for (var j = 0 ; j < n ; j++) {
                arr.push({
                    x: j * 4 * r + 3 * r,
                    y: i * 4 * r + 3 * r
                });
                restPoint.push({
                    x: j * 4 * r + 3 * r,
                    y: i * 4 * r + 3 * r
                });
            }
        }
        //return arr;
    }

canvas里的圆形画好之后方可拓展事件绑定

JavaScript

function bindEvent() { can.addEventListener(“touchstart”, function (e) {
var po = getPosition(e); console.log(po); for (var i = 0 ; i <
arr.length ; i++) { if (Math.abs(po.x – arr[i].x) < r &&
Math.abs(po.y – arr[i].y) < r) { // 用来判定早先点是不是在规模内部
touchFlag = true; drawPoint(arr[i].x,arr[i].y);
lastPoint.push(arr[i]); restPoint.splice(i,1); break; } } }, false);
can.addEventListener(“touchmove”, function (e) { if (touchFlag) {
update(getPosition(e)); } }, false); can.addEventListener(“touchend”,
function (e) { if (touchFlag) { touchFlag = false; storePass(lastPoint);
setTimeout(function(){ init(); }, 300); } }, false); }

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function bindEvent() {
        can.addEventListener("touchstart", function (e) {
             var po = getPosition(e);
             console.log(po);
             for (var i = 0 ; i < arr.length ; i++) {
                if (Math.abs(po.x – arr[i].x) < r && Math.abs(po.y – arr[i].y) < r) { // 用来判断起始点是否在圈圈内部
 
                    touchFlag = true;
                    drawPoint(arr[i].x,arr[i].y);
                    lastPoint.push(arr[i]);
                    restPoint.splice(i,1);
                    break;
                }
             }
         }, false);
         can.addEventListener("touchmove", function (e) {
            if (touchFlag) {
                update(getPosition(e));
            }
         }, false);
         can.addEventListener("touchend", function (e) {
             if (touchFlag) {
                 touchFlag = false;
                 storePass(lastPoint);
                 setTimeout(function(){
 
                    init();
                }, 300);
             }
 
         }, false);
    }

随后到了最重庆大学的步骤绘制解锁路径逻辑,通过touchmove事件的频频触发,调用canvas的moveTo方法和lineTo方法来画出折现,同时判断是还是不是达到大家所画的规模里面,当中lastPoint保存不易的局面路径,restPoint保存全体局面去除正确路线之后剩余的。
Update方法:

JavaScript

function update(po) {// 核心转移格局在touchmove时候调用 ctx.clearRect(0,
0, ctx.canvas.width, ctx.canvas.height); for (var i = 0 ; i <
arr.length ; i++) { // 每帧先把面板画出来 drawCle(arr[i].x,
arr[i].y); } drawPoint(lastPoint);// 每帧花轨迹 drawLine(po ,
lastPoint);// 每帧画圆心 for (var i = 0 ; i < restPoint.length ; i++)
{ if (Math.abs(po.x – restPoint[i].x) < r && Math.abs(po.y –
restPoint[i].y) < r) { drawPoint(restPoint[i].x,
restPoint[i].y); lastPoint.push(restPoint[i]); restPoint.splice(i,
1); break; } } }

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function update(po) {// 核心变换方法在touchmove时候调用
        ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
 
        for (var i = 0 ; i < arr.length ; i++) { // 每帧先把面板画出来
            drawCle(arr[i].x, arr[i].y);
        }
 
        drawPoint(lastPoint);// 每帧花轨迹
        drawLine(po , lastPoint);// 每帧画圆心
 
        for (var i = 0 ; i < restPoint.length ; i++) {
            if (Math.abs(po.x – restPoint[i].x) < r && Math.abs(po.y – restPoint[i].y) < r) {
                drawPoint(restPoint[i].x, restPoint[i].y);
                lastPoint.push(restPoint[i]);
                restPoint.splice(i, 1);
                break;
            }
        }
 
    }

末了正是截止工作,把路子里面包车型大巴lastPoint保存的数组变成密码存在localstorage里面,之后就用来拍卖解锁验证逻辑了

JavaScript

function storePass(psw) {// touchend结束之后对密码和状态的拍卖 if
(pswObj.step == 1) { if (checkPass(pswObj.fpassword, psw)) { pswObj.step
= 2; pswObj.spassword = psw; document.getElementById(‘title’).innerHTML
= ‘密码保存成功’; drawStatusPoint(‘#2CFF26’);
window.localStorage.setItem(‘passwordx’,
JSON.stringify(pswObj.spassword));
window.localStorage.setItem(‘chooseType’, chooseType); } else {
document.getElementById(‘title’).innerHTML = ‘五遍不雷同,重新输入’;
drawStatusPoint(‘red’); delete pswObj.step; } } else if (pswObj.step ==
2) { if (checkPass(pswObj.spassword, psw)) {
document.getElementById(‘title’).innerHTML = ‘解锁成功’;
drawStatusPoint(‘#2CFF26’); } else { drawStatusPoint(‘red’);
document.getElementById(‘title’).innerHTML = ‘解锁败北’; } } else {
pswObj.step = 1; pswObj.fpassword = psw;
document.getElementById(‘title’).innerHTML = ‘再度输入’; } }

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function storePass(psw) {// touchend结束之后对密码和状态的处理
        if (pswObj.step == 1) {
            if (checkPass(pswObj.fpassword, psw)) {
                pswObj.step = 2;
                pswObj.spassword = psw;
                document.getElementById(‘title’).innerHTML = ‘密码保存成功’;
                drawStatusPoint(‘#2CFF26’);
                window.localStorage.setItem(‘passwordx’, JSON.stringify(pswObj.spassword));
                window.localStorage.setItem(‘chooseType’, chooseType);
            } else {
                document.getElementById(‘title’).innerHTML = ‘两次不一致,重新输入’;
                drawStatusPoint(‘red’);
                delete pswObj.step;
            }
        } else if (pswObj.step == 2) {
            if (checkPass(pswObj.spassword, psw)) {
                document.getElementById(‘title’).innerHTML = ‘解锁成功’;
                drawStatusPoint(‘#2CFF26’);
            } else {
                drawStatusPoint(‘red’);
                document.getElementById(‘title’).innerHTML = ‘解锁失败’;
            }
        } else {
            pswObj.step = 1;
            pswObj.fpassword = psw;
            document.getElementById(‘title’).innerHTML = ‘再次输入’;
        }
 
    }

解锁组件

将那些HTML5解锁写成了3个零件,放在https://github.com/lvming6816077/H5lock

二维码体验: manbetx2.0手机版 2

 

参考资料:http://www.nihaoshijie.com.cn/index.php/archives/537

1 赞 4 收藏 1
评论

manbetx2.0手机版 3

2.Siimpler
Siimpler enables you to build your HTML5 starting boilerplate by
selecting the parts which you want to include.
http://siimpler.com/

 http://www.infoq.com/cn/news/2014/05/web-ui-framework

(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();
              });
        }
})();

 

对于国内的前端开发框架,小编也做了剖析:

1.ionic http://ionicframework.com/
https://github.com/driftyco
Advanced HTML5 mobile development framework and SDK. Build incredible
mobile apps with web technologies you already know and love. Best
friends with AngularJS.

 

  

4.LimeJS
LimeJS is a HTML5 game framework for building fast, native-experience
games for all modern touchscreens and
desktop browsers.
http://www.limejs.com/

JS:

3.Foundation
http://foundation.zurb.com/

5.Enyo
http://enyojs.com/
Use Enyo to develop apps for all major platforms, from phones and
tablets to PCs and TVs

从国外的桌面端框架来说,作者认为关键有以下多少个:

微软在MIT下开源DirectX工具集最新开源的软件包罗了:DirectX Tool
Kit,DirectXTex,DirectXMesh,UVAtlas,Effects 11,DXUT11,萨姆ple
Content Exporter等等。

https://github.com/enyojs

二〇一五 年最棒的 5 个 HTML5 框架
http://www.oschina.net/translate/top-html5-frameworks-in-2015?print

  HTML5:

来源:https://github.com/lvming6816077/H5lock
http://threejs.org/examples/
http://www.inf.usi.ch/phd/wettel/codecity-download.html
(JSCity:把源码可视化成建筑的 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)

<!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
 /* 
JSCity:把源码可视化成建筑物的 JS 库
http://threejs.org/examples/ http://www.inf.usi.ch/phd/wettel/codecity-download.html https://github.com/lvming6816077/H5lock
HTML5实现屏幕手势解锁
*/ new H5lock({ chooseType: 3 }).init(); </script> </body> </html>

http://extjs.org.cn/node/699
乘势Web技术的四处开拓进取,前端开发框架家常便饭,各有千秋,开发者在做技术选型时总是要费一番脑筋,目前,IBM高工何钦侠撰文对Bootstrap、jQuery
UI、jQuery Mobile、Sencha ExtJS、Sencha Touch、Sencha GXT、Dojo、Dojo
Mobile、Mootools、Foundation、YUI、Kissy、QWrap 等 16个国内外前端开发框架实行了相比详细的可比,卓殊值得读者借鉴。
http://www.infoq.com/cn/news/2014/05/web-ui-framework

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