diff --git a/pages/canvas/index.js b/pages/canvas/index.js index b25a259..e55dd09 100644 --- a/pages/canvas/index.js +++ b/pages/canvas/index.js @@ -4,7 +4,6 @@ const Http = require("../../utils/HttpBasics"); const util = require("../../utils/util"); const imgurl = require("../../utils/imgurl"); Page({ - /** * 页面的初始数据 */ @@ -13,15 +12,16 @@ Page({ windowWidth: wx.getSystemInfoSync().windowWidth, windowHeight: wx.getSystemInfoSync().screenHeight, totalHeight: 0, - qrCodeL: '', //小程序码 + mallname:'',//商场名字 + qrCodeL: "", //小程序码 couponList: [], //活动劵列表 - canvasScale: 1.0, // 画布放大的倍数,因为如果保存的是一倍的分享图片的话,分享图会有点虚。所以保存的时候,canvasScale设置为2.0,wxss 里面的left: 500%;打开注释。就可保存两倍的分享图 + canvasScale: 1.0 // 画布放大的倍数,因为如果保存的是一倍的分享图片的话,分享图会有点虚。所以保存的时候,canvasScale设置为2.0,wxss 里面的left: 500%;打开注释。就可保存两倍的分享图 }, /** * 生命周期函数--监听页面加载 */ - onLoad: function (options) { + onLoad: function(options) { let that = this; //劵详情 if (options && options.couponChannelId) { @@ -31,13 +31,14 @@ Page({ that.getCouponList(options.merchantId); } this.getUserInfo(); + this.getMallInfo(); this.begainDrawShareImage(options); }, /** * 获取劵详情 */ - getDetail: function (couponChannelId) { + getDetail: function(couponChannelId) { let that = this; // 获取用户信息 Http.get({ @@ -45,192 +46,196 @@ Page({ data: { couponChannelId: couponChannelId } - }) - .then(res => { - console.log(res) - that.setData({ - data: res.data, - }) - }) + }).then(res => { + that.setData({ + data: res.data + }); + }); }, /** - * 获取商户详情 - */ - getList: function (id) { + * 获取商户详情 + */ + getList: function(id) { let that = this; let data; data = { pageNum: 1, pageSize: 15, id: id - } + }; Http.get({ url: config.api.merchantList, data: data - }).then(res => { - that.setData({ - data: res.data.list[0], - }) }) + .then(res => { + that.setData({ + data: res.data.list[0] + }); + }) .catch(err => { wx.showToast({ title: err.errMsg, - icon: 'none', + icon: "none", duration: 2000, mask: false }); - }) + }); }, /** * 绘制分享海报 */ begainDrawShareImage(options) { wx.showLoading({ - title: '生成中...', - }) + title: "生成中..." + }); - var that = this + var that = this; // 适配屏幕 - let scale = this.data.windowWidth / 375.0 + let scale = this.data.windowWidth / 375.0; this.setData({ totalHeight: 767 * scale - }) + }); // 获取Canvas - let ctx = wx.createCanvasContext('myCanvas') + let ctx = wx.createCanvasContext("myCanvas"); // 获取宽高 let wW = that.data.windowWidth; let wH = that.data.windowHeight; // 放大 因为不放大的话,生成的分享图会模糊。暂时先注释 - ctx.scale(this.data.canvasScale, this.data.canvasScale) + ctx.scale(this.data.canvasScale, this.data.canvasScale); // 首先要绘制顶部的背景图片,因为它在最底层,然后才能绘制其他内容 - let bgimg1 = that.data.poterbg + `?imageView/2/w/${wW}/h/${wH}` - let bgimg2 = util.getProxyImgUrl(bgimg1) + let bgimg1 = that.data.poterbg + `?imageView/2/w/${wW}/h/${wH}`; + let bgimg2 = util.getProxyImgUrl(bgimg1); wx.getImageInfo({ src: bgimg2, - success: function (res) { - ctx.drawImage(res.path, 0, 0, wW - 20, wH); + success: function(res) { that.drawshopimg(ctx, scale, options); - ctx.draw(true) + ctx.draw(true); } - }) - + }); }, + //绘制商品图片 drawshopimg(ctx, scale, options) { - var that = this - let topImageWidth = parseInt(315 * scale) // 因为小数有时候会请求不到图片,所以转成int - let topImageHeight = parseInt(200 * scale) - let src1 = "" - let src2 = '' + var that = this; + let topImageWidth = parseInt(375 * scale); // 因为小数有时候会请求不到图片,所以转成int + let topImageHeight = parseInt(260 * scale); + let src1 = ""; + let src2 = ""; //劵详情海报 if (options && options.couponChannelId) { - src1 = that.data.data.coverImg + `?imageView/2/w/${topImageWidth}/h/${topImageHeight}` - src2 = util.getProxyImgUrl(src1) - this.drawNormalText(ctx, "长按二维码识别小程序享优惠", 85 * scale, 570 * scale, 16 * scale, '#000', 'left', 'middle', scale); - } else if (options && options.merchantId) {//商户详情海报 - src1 = that.data.data.merchantImgUrl + `?imageView/2/w/${topImageWidth}/h/${topImageHeight}` - src2 = util.getProxyImgUrl(src1) - this.drawNormalText(ctx, "长按二维码识别小程序进店逛逛", 85 * scale, 570 * scale, 16 * scale, '#000', 'left', 'middle', scale); + src1 =that.data.data.coverImg +`?imageView/2/w/${topImageWidth}/h/${topImageHeight}`; + src2 = util.getProxyImgUrl(src1); + + } else if (options && options.merchantId) { + //商户详情海报 + src1 =that.data.data.merchantImgUrl +`?imageView/2/w/${topImageWidth}/h/${topImageHeight}`; + src2 = util.getProxyImgUrl(src1); + } wx.getImageInfo({ src: src2, - success: function (res) { - if (options && options.merchantId) { - // 绘制白色背景 - ctx.setFillStyle('#fff') - ctx.fillRect(15, 45, topImageWidth + 10, topImageHeight + 10) - ctx.drawImage(res.path, 20, 50, topImageWidth, topImageHeight) - that.drawOtherImage(ctx, scale) - that.drawOtherContent(ctx, scale) - } else if ((options && options.couponChannelId)) { - ctx.setFillStyle('#fff') - ctx.fillRect(15, 95, topImageWidth + 10, topImageHeight + 10) - ctx.drawImage(res.path, 20, 100, topImageWidth, topImageHeight) - that.drawCouponContent(ctx, scale) + success: function(res) { + // 绘制白色背景 + ctx.setFillStyle("#fbfbfb"); + ctx.fillRect(0, 0, that.data.windowWidth, that.data.windowHeight); + // that.roundRect(ctx,0, 320, that.data.windowWidth, 320,50) + ctx.drawImage(res.path, 0, 50, topImageWidth, topImageHeight); + ctx.setFillStyle("blue"); + that.roundRect(ctx,12, 270, 330, 150,10) + that.drawOtherImage(ctx, scale); + that.drawOtherContent(ctx, scale,options); + that.darwAvatarArc(ctx, that.data.avatarUrl, 10, 8, 35, 35); that.drawqrCode(ctx, scale); - } - wx.hideLoading() + wx.hideLoading(); } - }) + }); }, // 商户海报绘制 - drawOtherContent(ctx, scale) { - //昵称 - this.drawNormalText(ctx, this.data.nickName + " 向您推荐", 20 * scale, 25 * scale, 16 * scale, '#fff', 'left', 'middle', scale); - //店铺名 - this.drawNormalText(ctx, this.data.data.merchantName, 180 * scale, 280 * scale, 30 * scale, '#fff', 'center', 'middle', scale); + drawOtherContent(ctx, scale,options) { + //昵称 + this.drawNormalText(ctx,this.data.nickName,60 * scale,25 * scale,16 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx," 向您推荐",120 * scale,25 * scale,16 * scale,"#848484","left","middle",scale); + this.drawNormalText(ctx,"---"+this.data.mallname+"---",175 * scale,530 * scale,16 * scale,"#000","left","middle",scale); + if (options && options.merchantId) { + //店铺名 + this.drawNormalText(ctx,"商户名称:"+this.data.data.merchantName,40 * scale,300 * scale,22 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx,"商户位置:"+this.data.data.shopVoList[0].buildingName+this.data.data.shopVoList[0].floorName+"--"+this.data.data.shopVoList[0].shopNumber,40 * scale,340 * scale,18 * scale,"#F4AA91","left","middle",scale); + this.drawNormalText(ctx,"商户电话:"+this.data.data.merchantLinkPhone,40 * scale,380 * scale,16 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx,"长按识别,进店去看看",155 * scale,500 * scale,16 * scale,"#000","left","middle",scale); if (this.data.couponList.length > 0) { for (let i = 0; i < this.data.couponList.length; i++) { // 第一个商品信息 - this.drawNormalText(ctx, this.substrTile(this.data.couponList[1].title), 30 * scale, 396 * scale, 14 * scale, '#000', 'left', 'middle', scale); - this.drawNormalText(ctx, "价格:" + this.data.couponList[1].salePrice, 30 * scale, 416 * scale, 14 * scale, '#FF3232', 'left', 'middle', scale); + this.drawNormalText(ctx,this.substrTile(this.data.couponList[1].title),30 * scale,396 * scale,14 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx,"价格:" + this.data.couponList[1].salePrice,30 * scale,416 * scale,14 * scale,"#FF3232","left","middle",scale); //第二个商品信息 - this.drawNormalText(ctx, this.substrTile(this.data.couponList[2].title), 145 * scale, 396 * scale, 14 * scale, '#000', 'left', 'middle', scale); - this.drawNormalText(ctx, "价格:" + this.data.couponList[2].salePrice, 145 * scale, 416 * scale, 14 * scale, '#FF3232', 'left', 'middle', scale); + this.drawNormalText(ctx,this.substrTile(this.data.couponList[2].title),145 * scale,396 * scale,14 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx,"价格:" + this.data.couponList[2].salePrice,145 * scale,416 * scale,14 * scale,"#FF3232","left","middle",scale); //第三个商品信息 - this.drawNormalText(ctx, this.substrTile(this.data.couponList[3].title), 260 * scale, 396 * scale, 14 * scale, '#000', 'left', 'middle', scale); - this.drawNormalText(ctx, "价格:" + this.data.couponList[3].salePrice, 260 * scale, 416 * scale, 14 * scale, '#FF3232', 'left', 'middle', scale); + this.drawNormalText(ctx,this.substrTile(this.data.couponList[3].title),260 * scale,396 * scale,14 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx,"价格:" + this.data.couponList[3].salePrice,260 * scale,416 * scale,14 * scale,"#FF3232","left","middle",scale); } - } - - ctx.draw(true) - - }, - // 劵海报绘制 - drawCouponContent(ctx, scale) { - //昵称 - this.drawNormalText(ctx, this.data.data.title, 20 * scale, 25 * scale, 30 * scale, '#fff', 'left', 'middle', scale); - this.drawNormalText(ctx, "售价:" + this.data.data.salePriceStr, 50 * scale, 65 * scale, 30 * scale, '#fff', 'left', 'middle', scale); - ctx.draw(true) - + } else if (options && options.couponChannelId) { + this.drawNormalText(ctx,"长按识别,享优惠",155 * scale,500 * scale,16 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx,this.data.data.title,40 * scale,300 * scale,23 * scale,"#000","left","middle",scale); + this.drawNormalText(ctx,"售价:" + this.data.data.salePriceStr,40 * scale,330 * scale,20* scale,"#F4AA91","left","middle",scale); + this.drawNormalText(ctx,"原价:" + this.data.data.salePriceStr,120 * scale,330 * scale,16 * scale,"#DFDCDB","left","middle",scale); + this.drawNormalText(ctx,"适用门店:",40 * scale,360 * scale,16 * scale,"#000","left","middle",scale); + for(var i=0;i 0) { - let cotentImageWidth = parseInt(80 * scale) - let cotentImageHeight = parseInt(80 * scale) + let cotentImageWidth = parseInt(80 * scale); + let cotentImageHeight = parseInt(80 * scale); for (let i = 0; i < that.data.couponList.length; i++) { - let imageItem = that.data.couponList[i].coverImg - let src1 = imageItem + `?imageView/2/w/${cotentImageWidth}/h/${cotentImageHeight}` - let src2 = util.getProxyImgUrl(src1) + let imageItem = that.data.couponList[i].coverImg; + let src1 =imageItem +`?imageView/2/w/${cotentImageWidth}/h/${cotentImageHeight}`; + let src2 = util.getProxyImgUrl(src1); wx.getImageInfo({ src: src2, - success: function (res) { - ctx.drawImage(res.path, 35 * scale + i * 110 * scale, 300 * scale, cotentImageWidth, cotentImageHeight) + success: function(res) { + ctx.drawImage(res.path,35 * scale + i * 110 * scale,300 * scale,cotentImageWidth,cotentImageHeight); } - }) + }); } - } that.drawqrCode(ctx, scale); }, //截取商品名 substrTile(str) { - return str.substr(0, 5) + '...' + return str.substr(0, 5) + "..."; }, // 绘制只有一行的文字 drawNormalText(ctx, str, x, y, font, style, align, baseLine) { @@ -241,10 +246,18 @@ Page({ ctx.fillText(str, x, y); }, /* - * 绘制多行文本,自动换行,超出添加... - * - */ - canvasTextAutoLine: function (str, ctx, initX, initY, lineHeight, maxWidth, row = 1) { + * 绘制多行文本,自动换行,超出添加... + * + */ + canvasTextAutoLine: function( + str, + ctx, + initX, + initY, + lineHeight, + maxWidth, + row = 1 + ) { var lineWidth = 0; var lastSubStrIndex = 0; var currentRow = 1; @@ -252,9 +265,9 @@ Page({ lineWidth += ctx.measureText(str[i]).width; if (lineWidth > maxWidth) { currentRow++; - let newStr = str.substring(lastSubStrIndex, i) + let newStr = str.substring(lastSubStrIndex, i); if (currentRow > row && str.length > i) { - newStr = str.substring(lastSubStrIndex, i - 2) + '...' + newStr = str.substring(lastSubStrIndex, i - 2) + "..."; } ctx.fillText(newStr, initX, initY); initY += lineHeight; @@ -270,119 +283,182 @@ Page({ } } }, + //绘制圆角图像 + darwAvatarArc: function(ctx, src, x, y, w, h = w) { + /* + ctx: 画布对象 + src: 头像缓存路径 + x: 头像起始位置 横坐标 + y: 头像起始位置 纵坐标 + w: 头像宽度 + h: 头像高度,不传为w + */ + // 保存绘图上下文。 + ctx.save(); + // 开始创建一个路径。需要调用 fill 或者 stroke 才会使用路径进行填充或描边 + ctx.beginPath(); + // 设创建一个圆可以指定 起始弧度为 0,终止弧度为 2 * Math.PI。 + // 用 stroke 或者 fill 方法来在 canvas 中画弧线。 + ctx.arc(x + w / 2, y + h / 2, w / 2, 0, Math.PI * 2, false); + /* 从原始画布中剪切任意形状和尺寸。 + 一旦剪切了某个区域,则所有之后的绘图都会被限制在被剪切的区域内( + 不能访问画布上的其他区域)。可以在使用 clip 方法前通过使用 save 方法对当前画布区域进行保存,并在以后的任意时间通过restore方法对其进行恢复。 + */ + ctx.clip(); + // 画头像 + ctx.drawImage(src, x, y, w, h); + // 恢复之前保存的绘图上下文。 + ctx.restore(); + // 将之前在绘图上下文中的描述(路径、变形、样式)画到 canvas 中。 + ctx.draw(true); + }, + //绘制圆角矩形 + roundRect:function(ctx, x, y, w, h, r) { + ctx.save(); + if (w < 2 * r) {r = w / 2;} + if (h < 2 * r){ r = h / 2;} + ctx.beginPath(); + // ctx.setStrokeStyle('white'); + ctx.setFillStyle('white') + ctx.setLineWidth(4); + ctx.moveTo(x+r, y); + ctx.arcTo(x+w, y, x+w, y+h, r); + ctx.arcTo(x+w, y+h, x, y+h, r); + ctx.arcTo(x, y+h, x, y, r); + ctx.arcTo(x, y, x+w, y, r); + ctx.fill(); + ctx.closePath(); + ctx.draw(true); +}, //获取商户优惠劵信息 - getCouponList: function (id) { + getCouponList: function(id) { let that = this; let data; data = { status: 0, merchantId: id, pageNum: 1, - pageSize: 15, - } + pageSize: 15 + }; Http.get({ url: config.api.listByMerchant, data: data - }).then(res => { - that.setData({ - couponList: res.data.page.list, - qrCode: res.data.qrCode, - }) }) + .then(res => { + that.setData({ + couponList: res.data.page.list, + qrCode: res.data.qrCode + }); + }) .catch(err => { wx.showToast({ title: err.errMsg, - icon: 'none', + icon: "none", duration: 2000, mask: false }); - }) + }); }, //获取头像和昵称 - getUserInfo: function () { + getUserInfo: function() { let that = this; // 获取用户信息 Http.get({ url: config.api.getScore, data: {} - }) - .then(res => { - console.log(res) - that.setData({ - nickName: res.data.nickName, - avatarUrl: res.data.avatarUrl - }) - }) + }).then(res => { + that.setData({ + nickName: res.data.nickName, + avatarUrl: res.data.avatarUrl + }); + }); }, + //商场信息 + getMallInfo: function() { + let that = this; + // 获取用户信息 + Http.get({ + url: config.api.getMallInfo, + data: {} + }).then(res => { + console.log(res); + that.setData({ + mallname:res.data.name + }); + }); + }, /** - * 保存图片 - */ + * 保存图片 + */ saveImage() { - let that = this + let that = this; wx.canvasToTempFilePath({ x: 0, y: 0, width: this.data.windowWidth * this.data.canvasScale, height: this.data.totalHeight * this.data.canvasScale, - canvasId: 'myCanvas', - success: function (res) { + canvasId: "myCanvas", + success: function(res) { that.saveImageToPhotos(res.tempFilePath); }, - fail: function (res) { + fail: function(res) { wx.showToast({ - title: '图片生成失败', - icon: 'none', + title: "图片生成失败", + icon: "none", duration: 2000 - }) + }); } - }) + }); }, - saveImageToPhotos: function (tempFilePath) { + saveImageToPhotos: function(tempFilePath) { wx.saveImageToPhotosAlbum({ filePath: tempFilePath, success(result) { wx.showToast({ - title: '保存成功,从相册中分享到朋友圈吧', - icon: 'none', + title: "保存成功,从相册中分享到朋友圈吧", + icon: "none", duration: 4000 - }) + }); }, - fail: function (err) { - if (err.errMsg === "saveImageToPhotosAlbum:fail:auth denied" || err.errMsg === "saveImageToPhotosAlbum:fail auth deny") { + fail: function(err) { + if ( + err.errMsg === "saveImageToPhotosAlbum:fail:auth denied" || + err.errMsg === "saveImageToPhotosAlbum:fail auth deny" + ) { // 这边微信做过调整,必须要在按钮中触发,因此需要在弹框回调中进行调用 wx.showModal({ - title: '提示', - content: '需要您授权保存相册', + title: "提示", + content: "需要您授权保存相册", showCancel: false, success: modalSuccess => { wx.openSetting({ success(settingdata) { - console.log("settingdata", settingdata) - if (settingdata.authSetting['scope.writePhotosAlbum']) { + console.log("settingdata", settingdata); + if (settingdata.authSetting["scope.writePhotosAlbum"]) { wx.showModal({ - title: '提示', - content: '获取权限成功,再次点击图片即可保存', - showCancel: false, - }) + title: "提示", + content: "获取权限成功,再次点击图片即可保存", + showCancel: false + }); } else { wx.showModal({ - title: '提示', - content: '获取权限失败,将无法保存到相册哦~', - showCancel: false, - }) + title: "提示", + content: "获取权限失败,将无法保存到相册哦~", + showCancel: false + }); } }, fail(failData) { - console.log("failData", failData) + console.log("failData", failData); }, complete(finishData) { - console.log("finishData", finishData) + console.log("finishData", finishData); } - }) + }); } - }) + }); } - }, - }) + } + }); } -}) \ No newline at end of file +});