效果展示
实现原理 利用的canvas,将解锁的圈圈划出,利用touch事件解锁这些圈圈,直接看代码。
- 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;
- }
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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);
- }
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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;
- }
- }
- }
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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';
- }
- }
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