H5实现荧屏手势解锁

2019-11-22 00:16栏目:WRB前端

HTML5得以达成显示器手势解锁

2015/07/18 · HTML5 · 1 评论 · 手势解锁

初藳出处: AlloyTeam   

作用呈现

图片 1

兑现原理 利用HTML5的canvas,将解锁的范畴划出,利用touch事件解锁这几个规模,直接看代码。

JavaScript

function createCircle() {// 成立解锁点的坐标,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);// 公式计算 半径和canvas的尺寸有关 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; }

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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里的圈子画好未来方可拓宽事件绑定

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) { // 用来决断早先点是或不是在规模内部 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);
    }

继而到了最重要的步骤绘制解锁路线逻辑,通过touchmove事件的缕缕触发,调用canvas的moveTo方法和lineTo方法来画出折现,同不时间判别是还是不是达到规定的标准我们所画的范围里面,个中lastPoint保存不易的范围路线,restPoint保存全体范畴去除精确路径之后剩余的。 Update方法:

JavaScript

function update(po) {// 主题转移情势在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;
            }
        }
 
    }

最后正是截至职业,把路子里面包车型客车lastPoint保存的数组造成密码存在localstorage里面,之后就用来拍卖解锁验证逻辑了

JavaScript

function storePass(psw) {// touchend甘休之后对密码和气象的拍卖 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 = '四回不黄金时代致,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 = '再一次输入'; } }

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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

将以此HTML5解锁写成了二个构件,放在

二维码体验: 图片 2

 

参谋资料:

1 赞 4 收藏 1 评论

图片 3

图片 4

金镶玉裹福禄双全原理运用HTML5的canvas,将解锁的局面划出,利用touch事件解锁那个层面,直接看代码。

functioncreateCircle(){// 创制解锁点的坐标,依照canvas的尺寸来平均分配半径

varn = chooseType;// 画出n*n的矩阵

lastPoint = [];

arr = [];

restPoint = [];

r = ctx.canvas.width / (2 4* n);// 公式总结 半径和canvas的高低有关

for(vari =0; i < n ; i ) {

for(varj =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宽事件绑定

functionbindEvent(){

can.addEventListener("touchstart",function(e){

varpo = getPosition(e);

console.log(po);

for(vari =0; i < arr.length ; i ) {

if(Math.abs(po.x - arr[i].x) < r &&Math.abs(po.y - arr[i].y) < r) {// 用来决断起始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);

}

随后到了最重要的步骤绘制解锁路线逻辑,通过touchmove事件的穿梭触发,调用canvas的moveTo方法和lineTo方法来画出折现,同一时间判别是或不是达到规定的标准大家所画的框框里面,当中lastPoint保存不易的局面路线,restPoint保存全体层面去除准确路径之后剩余的。 Update方法:

functionupdate(po){// 宗旨转移方式在touchmove时候调用

ctx.clearRect(0,0, ctx.canvas.width, ctx.canvas.height);

for(vari =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(vari =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;

}

}

}

最后便是截至职业,把门路里面包车型地铁lastPoint保存的数组形成密码存在localstorage里面,之后就用来处精晓锁验证逻辑了

functionstorePass(psw){// touchend甘休以往对密码和情景的管理

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 ='三遍不相仿,重新输入';

drawStatusPoint('red');

deletepswObj.step;

}

}elseif(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 ='解锁失利';

}

}else{

pswObj.step =1;

pswObj.fpassword = psw;

document.getElementById('title').innerHTML ='再度输入';

}

}

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