const navigationBarHeight = (getApp().statusBarHeight + 44) + 'px' var config = require("../../config/config.js"); var app = getApp(); const Http = require("../../utils/HttpBasics"); const util = require("../../utils/util"); const imgurl = require("../../utils/imgurl"); Page({ /** * 页面的初始数据 */ data: { navigationBarHeight, poterbg: imgurl.poterbg.url, windowWidth: wx.getSystemInfoSync().windowWidth, windowHeight: wx.getSystemInfoSync().screenHeight, totalHeight: 0, isdisable:true, 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 qrCode:"", }, /** * 生命周期函数--监听页面加载 */ onLoad: function(options) { let that = this; //劵详情 if (options && options.couponChannelId) { that.getDetail(options.couponChannelId); } else if (options && options.merchantId) { that.getList(options.merchantId); that.getCouponList(options.merchantId); } this.getUserInfo(options); }, /** * 获取劵详情 */ getDetail: function(couponChannelId) { let that = this; // 获取用户信息 Http.get({ url: config.api.couponDetail, data: { couponChannelId: couponChannelId } }).then(res => { that.setData({ data: res.data }); }); }, /** * 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] }); }) .catch(err => { wx.showToast({ title: err.errMsg, icon: "none", duration: 2000, mask: false }); }); }, /** * 绘制分享海报 */ begainDrawShareImage(options) { wx.showLoading({ title: "生成中..." }); var that = this; // 适配屏幕 let scale = this.data.windowWidth / 375.0 console.log(scale) this.setData({ totalHeight: 667 * scale }) // 获取Canvas 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); // 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); wx.getImageInfo({ src: bgimg2, success: function(res) { that.drawshopimg(ctx, scale, options); ctx.draw(true); } }); }, //绘制商品图片 drawshopimg(ctx, scale, options) { var that = this; let topImageWidth = parseInt(355 * 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 = ""; console.log(that.data.data.coverImg, "bgimg2") //劵详情海报 if (options && options.couponChannelId) { 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); } // console.log(, "789") let tempArr = src2.split('?') if(tempArr.length>2){ src2 = tempArr[0]+"?"+tempArr[1]+"&"+tempArr[2] } wx.getImageInfo({ src: src2, success: function(res) { // 绘制白色背景 ctx.setFillStyle("#fbfbfb"); ctx.fillRect(0, 0, that.data.windowWidth, that.data.windowHeight); ctx.drawImage(res.path, 0, 50, topImageWidth, topImageHeight); that.roundRect(ctx, 15 * scale, 270 * scale, 325 * scale, 125 * scale, 10* scale); that.drawOtherContent(ctx, scale, options); that.drawAvatarimg(ctx, scale); that.drawqrCode(ctx, scale); wx.hideLoading(); } }); this.setData({ isdisable:false, }) }, //绘制微信头像 drawAvatarimg(ctx, scale) { var that = this; //商户详情海报 let src1 = that.data.avatarUrl + `?imageView/2/w/${100}/h/${100}`; let src2 = util.getProxyImgUrl(src1); wx.getImageInfo({ src: src2, success: function(res) { console.log(res.path) that.darwAvatarArc(ctx, res.path, 10, 8, 35, 35); } }); }, // 商户海报绘制 drawOtherContent(ctx, scale, options) { let that = this; console.log(ctx.measureText(this.data.nickName).width); //昵称 this.drawNormalText(ctx, this.data.nickName, 48 * scale, 24 * scale, 16 * scale, "#000", "left", "middle", scale); this.drawNormalText(ctx, " 向您推荐", (ctx.measureText(this.data.nickName).width+60) * scale, 25 * scale, 16 * scale, "#848484", "left", "middle", scale); this.drawNormalText(ctx, "---" + this.data.mallname + "---", 175 * scale, 500 * 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, 30 * scale, 295 * scale, 20 * 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, 30 * scale, 320 * scale, 15 * scale, "#F4AA91", "left", "middle", scale); this.drawNormalText(ctx, "商户电话:" + this.data.data.merchantLinkPhone, 30 * scale, 348 * scale, 16 * scale, "#000", "left", "middle", scale); this.drawNormalText(ctx, "长按识别,进店去看看", 155 * scale, 470 * scale, 16 * scale, "#000", "left", "middle", scale); } else if (options && options.couponChannelId) { this.drawNormalText(ctx, "长按识别,进店去看看", 155 * scale, 470 * scale, 16 * scale, "#000", "left", "middle", scale); // this.drawNormalText(ctx, this.data.data.title, 30 * scale, 295 * scale, 20 * scale, "#000", "left", "middle", scale); this.canvasTextAutoLine(this.data.data.title, ctx, 30 * scale, 295 * scale, 20 * scale, "#000", "left", "middle", 20, 260,1) this.drawNormalText(ctx, "售价:" + this.data.data.salePriceStr + "元", 30 * scale, 320 * scale, 15 * scale, "#F4AA91", "left", "middle", scale); this.drawNormalText(ctx, "适用门店:", 30 * scale, 348 * scale, 16 * scale, "#000", "left", "middle", scale); //适用门店字体的排列 for (let i = 0; i < that.data.data.merchantVoList.length;i++){ if(i==0){ that.drawNormalText(ctx, that.data.data.merchantVoList[i].merchantName, 30, 375 * scale, 14 * scale, "#000", "left", "middle", scale); }else if(i==1){ let width0=ctx.measureText(that.data.data.merchantVoList[0].merchantName).width that.drawNormalText(ctx, that.data.data.merchantVoList[i].merchantName, (width0+40)*scale, 375 * scale, 14 * scale, "#000", "left", "middle", scale); }else if(i==2){ let width0=ctx.measureText(that.data.data.merchantVoList[0].merchantName).width let width1=ctx.measureText(that.data.data.merchantVoList[1].merchantName).width that.drawNormalText(ctx, that.data.data.merchantVoList[i].merchantName+"...", (width1+width0+45)*scale, 375 * scale, 14 * scale, "#000", "left", "middle", scale); } } ctx.draw(true); } ctx.draw(true); }, //绘制小程序码 drawqrCode(ctx, scale) { let coImageWidth = parseInt(120 * scale); let coImageHeight = parseInt(120 * scale); let src1 = ""; let src2 = ""; console.log(this.data.qrCode, this.data.data.qrCode,"qrCode") if (this.data.qrCode) { src1 = this.data.qrCode + `?imageView/2/w/${coImageWidth}/h/${coImageHeight}`; src2 = util.getProxyImgUrl(src1); } else { src1 =this.data.data.qrCode +`?imageView/2/w/${coImageWidth}/h/${coImageHeight}`; src2 = util.getProxyImgUrl(src1); } wx.getImageInfo({ src: src2, success: function(res) { ctx.drawImage(res.path, 25 * scale, 420 * scale, coImageWidth, coImageHeight); ctx.draw(true); } }); }, //截取商品名 substrTile(str) { return str.substr(0, 5) + "..."; }, // 绘制只有一行的文字 drawNormalText(ctx, str, x, y, font, style, align, baseLine) { ctx.setFontSize(font); ctx.setFillStyle(style); ctx.setTextAlign(align); ctx.setTextBaseline(baseLine); 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,font,style,align,baseLine,lineHeight,maxWidth,row = 1) { var lineWidth = 0; var lastSubStrIndex = 0; var currentRow = 1; for (let i = 0; i < str.length; i++) { lineWidth += ctx.measureText(str[i]).width; if (lineWidth > maxWidth) { currentRow++; let newStr = str.substring(lastSubStrIndex, i); if (currentRow > row && str.length > i) { newStr = str.substring(lastSubStrIndex, i - 2) + "..."; } ctx.setFontSize(font); ctx.setFillStyle(style); ctx.setTextAlign(align); ctx.setTextBaseline(baseLine); ctx.fillText(newStr, initX, initY); initY += lineHeight; lineWidth = 0; lastSubStrIndex = i; if (currentRow > row) { break; } } if (i == str.length - 1) { ctx.setFontSize(font); ctx.setFillStyle(style); ctx.setTextAlign(align); ctx.setTextBaseline(baseLine); ctx.fillText(str.substring(lastSubStrIndex, i + 1), initX, initY); } } }, //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, c = '#fff') { if (w < 2 * r) { r = w / 2; } if (h < 2 * r) { r = h / 2; } ctx.beginPath(); ctx.fillStyle = c; ctx.arc(x + r, y + r, r, Math.PI, Math.PI * 1.5); ctx.moveTo(x + r, y); ctx.lineTo(x + w - r, y); ctx.lineTo(x + w, y + r); ctx.arc(x + w - r, y + r, r, Math.PI * 1.5, Math.PI * 2); ctx.lineTo(x + w, y + h - r); ctx.lineTo(x + w - r, y + h); ctx.arc(x + w - r, y + h - r, r, 0, Math.PI * 0.5); ctx.lineTo(x + r, y + h); ctx.lineTo(x, y + h - r); ctx.arc(x + r, y + h - r, r, Math.PI * 0.5, Math.PI); ctx.lineTo(x, y + r); ctx.lineTo(x + r, y); ctx.fill(); ctx.closePath(); }, //获取商户优惠劵信息 getCouponList: function(id) { let that = this; let data; data = { status: 0, merchantId: id, pageNum: 1, pageSize: 15 }; Http.post({ url: config.api.listByMerchant, data: data }) .then(res => { if (res.data && res.data.qrCode) { that.setData({ qrCode: res.data.qrCode, }) } that.setData({ couponList: res.data.page.list }); }) .catch(err => { wx.showToast({ title: err.errMsg, icon: "none", duration: 2000, mask: false }); }); }, //获取头像和昵称 getUserInfo: function (options) { let that = this; // 获取用户信息 Http.get({ url: config.api.getScore, data: {} }).then(res => { let nickName = ''; if (res.data.nickName == undefined || res.data.nickName == undefined) { wx.getUserInfo({ success: function (data) { nickName = data.userInfo.nickName; that.setData({ nickName: nickName, avatarUrl: data.userInfo.avatarUrl }); that.getMallInfo(options); } }) } else { nickName = res.data.nickName; that.setData({ nickName: nickName, avatarUrl: res.data.avatarUrl }); that.getMallInfo(options); } }); }, //商场信息 getMallInfo: function (options) { 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 }); that.begainDrawShareImage(options); }); }, /** * 保存图片 */ saveImage() { 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) { that.saveImageToPhotos(res.tempFilePath); }, fail: function(res) { wx.showToast({ title: "图片生成失败", icon: "none", duration: 2000 }); } }); }, 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", duration: 4000 }); }, 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", showCancel: false, success: modalSuccess => { wx.openSetting({ success(settingdata) { 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 }); } else { wx.showModal({ 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); }, complete(finishData) { console.log("finishData", finishData); } }); } }); } } }); } });