效果體驗二維碼

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DEMO下載

參考

H5lock

效果圖

WXML

<view class="container"><view class="reset" bindtap="resetPwd">重置密碼</view><view class="title">{{title}}</view><canvas canvas-id="canvas" class="canvas" bindtouchend="onTouchEnd"bindtouchstart="onTouchStart" bindtouchmove="onTouchMove"></canvas> </view>

JS

var Locker = class {constructor(page,opt){var obj = opt || {};this.page = page;this.width = obj.width || 300;this.height = obj.height || 300;this.canvasId = obj.id || 'canvas';this.cleColor = obj.cleColor || '#CFE6FF';this.cleCenterColor = obj.cleCenterColor || '#CFE6FF';var chooseType = obj.chooseType || 3;// 判斷是否緩存有chooseType，有就用緩存，沒有就用傳入的值this.chooseType = Number(wx.getStorageSync('chooseType')) || chooseType;this.init();}init(){this.pswObj = wx.getStorageSync('passwordxx') ? {step: 2,spassword: JSON.parse(wx.getStorageSync('passwordxx'))} : {};this.makeState();// 創建 canvas 繪圖上下文（指定 canvasId）this.ctx = wx.createCanvasContext(this.canvasId,this);this.touchFlag = false;this.lastPoint = [];// 繪制圓this.createCircle();// canvas綁定事件this.bindEvent();}makeState() {if (this.pswObj.step == 2) {this.page.setData({ title:'請解鎖'});} else if (this.pswObj.step == 1) {// pass} else {// pass}}// 畫圓方法drawCle(x,y){// 設置邊框顏色。this.ctx.setStrokeStyle(this.cleColor); // 注意用set// 設置線條的寬度。this.ctx.setLineWidth(2); // 注意用set// 開始創建一個路徑，需要調用fill或者stroke才會使用路徑進行填充或描邊。this.ctx.beginPath();// 畫一條弧線。this.ctx.arc(x, y, this.r, 0, Math.PI * 2, true);// 關閉一個路徑this.ctx.closePath();// 畫出當前路徑的邊框。默認顏色色為黑色。this.ctx.stroke();// 將之前在繪圖上下文中的描述（路徑、變形、樣式）畫到 canvas 中。this.ctx.draw(true);}// 計算兩點之間的距離的方法getDis(a, b) {return Math.sqrt(Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2));}// 創建解鎖點的坐標，根據canvas的大小（默認300px）來平均分配半徑createCircle() {var n = this.chooseType;var count = 0;// 計算圓半徑this.r = this.width / (2 + 4 * n);this.arr = [];this.restPoint = [];var r = this.r;// 獲取圓心坐標，以及當前圓所代表的數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);}}// 清空畫布this.ctx.clearRect(0, 0, this.width, this.height);// 繪制所有的圓this.arr.forEach(current => {this.drawCle(current.x, current.y);});}// 設置密碼繪制getPosition(e) { // 獲取touch點相對于canvas的坐標var po = {x: e.touches[0].x,y: e.touches[0].y};return po;}precisePosition(po){var arr = this.restPoint.filter(current => Math.abs(po.x - current.x) < this.r && Math.abs(po.y - current.y) < this.r);return arr[0];}drawPoint(obj) { // 初始化圓心for (var i = 0; i < this.lastPoint.length; i++) {this.ctx.setFillStyle(this.cleCenterColor); // 注意用set方法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();this.ctx.draw(true);}}drawLine(po) {// 解鎖軌跡this.ctx.beginPath();this.ctx.lineWidth = 3;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();this.ctx.draw(true);}pickPoints(fromPt, toPt) {var lineLength = this.getDis(fromPt, toPt);var dir = toPt.index > fromPt.index ? 1 : -1;var len = this.restPoint.length;var i = dir === 1 ? 0 : (len - 1);var limit = dir === 1 ? len : -1;while (i !== limit) {var pt = this.restPoint[i];if (this.getDis(pt, fromPt) + this.getDis(pt, toPt) === lineLength) {this.drawPoint(pt.x, pt.y);this.lastPoint.push(pt);this.restPoint.splice(i, 1);if (limit > 0) {i--;limit--;}}i += dir;}}update(po) {// 核心變換方法在touchmove時候調用this.ctx.clearRect(0, 0, this.width, this.height);for (var i = 0; i < this.arr.length; i++) { // 每幀先把面板畫出來this.drawCle(this.arr[i].x, this.arr[i].y);}this.drawPoint(this.lastPoint);// 每幀花軌跡this.drawLine(po, this.lastPoint);// 每幀畫圓心for (var i = 0; i < this.restPoint.length; i++) {var pt = this.restPoint[i];if (Math.abs(po.x - pt.x) < this.r && Math.abs(po.y - pt.y) < this.r) {this.drawPoint(pt.x, pt.y);this.pickPoints(this.lastPoint[this.lastPoint.length - 1], pt);break;}}}checkPass(psw1, psw2) {// 檢測密碼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;}storePass(psw) {// touchend結束之后對密碼和狀態的處理if (this.pswObj.step == 1) {if (this.checkPass(this.pswObj.fpassword, psw)) {this.pswObj.step = 2;this.pswObj.spassword = psw;this.page.setData({title:'密碼保存成功'});this.drawStatusPoint('#2CFF26');wx.setStorageSync('passwordxx', JSON.stringify(this.pswObj.spassword));wx.setStorageSync('chooseType', this.chooseType);} else {this.page.setData({ title: '兩次不一致，重新輸入' });this.drawStatusPoint('red');delete this.pswObj.step;}} else if (this.pswObj.step == 2) {if (this.checkPass(this.pswObj.spassword, psw)) {this.page.setData({ title: '解鎖成功' });this.drawStatusPoint('#2CFF26');} else {this.drawStatusPoint('red');this.page.setData({ title: '解鎖失敗' });}} else {this.pswObj.step = 1;this.pswObj.fpassword = psw;this.page.setData({ title: '再次輸入' });}}drawStatusPoint(type) { // 初始化狀態線條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();this.ctx.draw(true);}}updatePassword() {wx.removeStorageSync('passwordxx');wx.removeStorageSync('chooseType');this.pswObj = {};this.page.setData({ title: '繪制解鎖圖案' });this.reset();}reset() {this.makeState();this.createCircle();}bindEvent(){var self = this;this.page.onTouchStart = function(e){var po = self.getPosition(e);self.lastPoint = [];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;}}}this.page.onTouchMove = function(e){if (self.touchFlag) {self.update(self.getPosition(e));}}this.page.onTouchEnd = function(e){if (self.touchFlag) {self.touchFlag = false;self.storePass(self.lastPoint);setTimeout(function () {self.reset();}, 300);}}} } module.exports = Locker;

WXRUI體驗二維碼

如果文章對你有幫助的話，請打開微信掃一下二維碼，點擊一下廣告，支持一下作者！謝謝！

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