const Http = require("../../../../utils/HttpBasics"); const imgurl = require("../../../../utils/imgurl"); const config = require("../../../../config/config"); const extConfig = wx.getExtConfigSync ? wx.getExtConfigSync() : {} let imgOrgUrl = extConfig.attr.imgOrgUrl; let imgNewUrl = extConfig.attr.imgNewUrl; let app = getApp(); Page({ /** * 页面的初始数据 */ data: { teljpgUrl: imgurl.teljpg.url, share01: imgurl.share01.url, actUrl: imgurl.act.url, poster: './../../../../assets/images/picture.png', page: 1, imglist: null, shopVoList: [], couponList: [], //活动劵列表 qrCodeL:'',//小程序码 currentTab: 0, isshare: false, showpost: false, imgHeight: 0, id: null, windowWidth: 0, windowHeight: 0, totalHeight: 0, 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 }, /** * 分享海报的生成 */ //关闭海报 closePoste: function() { this.setData({ showpost: false }) }, /** * 生命周期函数--监听页面加载 */ onLoad: function(options) { let that = this; if (options && options.id) { this.setData({ id: options.id }); that.getList(options.id); that.getCouponList(options.id); this.setData({ currentTab: 0 }) } // 获取到屏幕的宽高等信息 wx.getSystemInfo({ success: function(res) { that.setData({ windowWidth: res.windowWidth, windowHeight: res.windowHeight }) } }) }, /** * 绘制分享海报 */ begainDrawShareImage() { wx.showLoading({ title: '生成中...', }) var that = this // 适配屏幕 let scale = this.data.windowWidth / 375.0 this.setData({ totalHeight: 767 * scale }) // 获取Canvas let ctx = wx.createCanvasContext('myCanvas') // 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) // 绘制主背景白色 ctx.setFillStyle('#ffffff') ctx.fillRect(0, 0, this.data.windowWidth, this.data.totalHeight) ctx.draw() // 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 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(250 * scale) let src1 = this.data.data.merchantImgUrl + `?imageView/2/w/${topImageWidth}/h/${topImageHeight}` let src2 = src1.replace(imgOrgUrl, imgNewUrl) wx.getImageInfo({ src: src2, success: function(res) { ctx.drawImage(res.path, 0, 0, topImageWidth, topImageHeight) // 覆盖黑色蒙层 ctx.setFillStyle('rgba(0,0,0,0.3)') ctx.fillRect(0, 0, topImageWidth, topImageHeight) ctx.draw(true) that.drawOtherContent(ctx, scale) that.drawOtherImage(ctx, scale) } }) }, // 绘制除了图片之外的剩余内容 drawOtherContent(ctx, scale) { // 绘制中间的灰色背景 ctx.setFillStyle('rgba(246,246,246,1)') //(x轴,y轴,宽,高) ctx.fillRect(14 * scale, 230 * scale, 347 * scale, 58 * scale) //name ctx.setFillStyle('white'); ctx.setFontSize(30 * scale); this.canvasTextAutoLine(this.data.data.merchantName, ctx, 20 * scale, 210 * scale, 30 * scale, 258 * scale, 1) // address ctx.setFillStyle('#000'); ctx.setFontSize(18 * scale); this.canvasTextAutoLine("地址:" + this.data.data.shopVoList[0].floorName + this.data.data.shopVoList[0].buildingName + this.data.data.shopVoList[0].shopNumber, ctx, 20 * scale, 265 * scale, 20 * scale, 305 * scale, 1) 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), 15 * scale, 416 * scale, 16 * scale, '#000', 'left', 'middle', scale); this.drawNormalText(ctx, "价格:"+this.data.couponList[1].salePrice, 15 * scale, 436 * scale, 14 * scale, '#FF3232', 'left', 'middle', scale); //第二个商品信息 this.drawNormalText(ctx, this.substrTile(this.data.couponList[2].title), 130 * scale, 416 * scale, 16 * scale, '#000', 'left', 'middle', scale); this.drawNormalText(ctx, "价格:"+this.data.couponList[2].salePrice, 130 * scale, 436 * scale, 14 * scale, '#FF3232', 'left', 'middle', scale); //第三个商品信息 this.drawNormalText(ctx, this.substrTile(this.data.couponList[3].title), 255 * scale, 416 * scale, 16 * scale, '#000', 'left', 'middle', scale); this.drawNormalText(ctx, "价格:"+this.data.couponList[3].salePrice, 255 * scale, 436 * scale, 14 * scale, '#FF3232', 'left', 'middle', scale); } this.drawNormalText(ctx, "点击下载保存海报到相册", 185 * scale, 506 * scale, 16 * scale, '#000', 'left', 'middle', scale); } ctx.draw(true) }, //截取商品名 substrTile(str){ return str.substr(0,5)+'...' }, // 绘制活动图片 drawOtherImage(ctx, scale) { var that = this // 如果该商户有活动商品 if (that.data.couponList.length>0) { let cotentImageWidth = parseInt(100 * scale) let cotentImageHeight = parseInt(100 * scale) let src3 = this.data.qrCode + `?imageView/2/w/${cotentImageWidth}/h/${cotentImageHeight}`//小程序码 let src4 = src3.replace(imgOrgUrl, imgNewUrl) 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 = src1.replace(imgOrgUrl, imgNewUrl) wx.getImageInfo({ src: src2, success: function(res) { ctx.drawImage(res.path, 15 * scale + i * 120 * scale, 300 * scale, cotentImageWidth, cotentImageHeight) ctx.draw(true) } }) } //有活动商品小程序码 wx.getImageInfo({ src: src4, success: function(res) { ctx.drawImage(res.path, 15 * scale * scale, 450 * scale, 150, 150) ctx.draw(true) } }) //没有活动商品生成小程序码 } else { if (this.data.qrCode) { let coImageWidth = parseInt(260 * scale) let coImageHeight = parseInt(260 * scale) let src1 = this.data.qrCode + `?imageView/2/w/${coImageWidth}/h/${coImageHeight}` let src2 = src1.replace(imgOrgUrl, imgNewUrl) wx.getImageInfo({ src: src2, success: function(res) { ctx.drawImage(res.path, 50 * scale, 320 * scale, coImageWidth, coImageHeight) ctx.draw(true) } }) } } wx.hideLoading() }, // 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... * str:要绘制的字符串 canvas:canvas对象 initX:绘制字符串起始x坐标 initY:绘制字符串起始y坐标 lineHeight:字行高,自己定义个值即可 maxWidth: 文本最大宽度 row: 最大行数 */ canvasTextAutoLine: function(str, ctx, initX, initY, 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.fillText(newStr, initX, initY); initY += lineHeight; lineWidth = 0; lastSubStrIndex = i; if (currentRow > row) { break; } } if (i == str.length - 1) { ctx.fillText(str.substring(lastSubStrIndex, i + 1), initX, initY); } } }, // 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) } }) } }) } }, }) }, /** * 拨打电话 */ phone: function(e) { let that = this; wx.makePhoneCall({ phoneNumber: e.target.dataset.merchantlinkphone }); }, /** * 显示分享弹框 */ showshare: function() { this.setData({ isshare: true, }) }, /** * 隐藏分享弹框 */ hidemodal: function() { this.setData({ isshare: false, }) }, //滑动切换 swiperTabView: function(e) { this.setData({ currentTab: e.detail.current }); }, /** * 隐藏分享海报 */ hideposter: function() { this.setData({ showpost: false, }) }, /** * 显示分享海报 */ showPoster: function() { this.setData({ showpost: true, }) this.begainDrawShareImage(); }, //点击切换 clickTab: function(e) { if (this.data.currentTab === e.target.dataset.current) { return false; } else { this.setData({ currentTab: e.target.dataset.current }) } }, /** * 获取商户详情 */ getList: function(id) { let that = this; let data; data = { pageNum: that.data.page, pageSize: 15, id: id } Http.get({ url: config.api.merchantList, data: data }).then(res => { let imgList = []; imgList.push(res.data.list[0].merchantImgUrl) that.setData({ data: res.data.list[0], shopVoList: res.data.list[0].shopVoList, imglist: res.data.list[0].coverPicture == '[]' ? imgList:JSON.parse(res.data.list[0].coverPicture), }) }) .catch(err => { wx.showToast({ title: err.errMsg, icon: 'none', duration: 2000, mask: false }); }) }, /** * 获取商户活动信息 券类型(1.满减券,2.代金券,3.团购券,4.礼品券,5.停车券,6.多商户券,8.砍价券,9.团购券,50.积分券,51.积分停车券 100.消费卡) * 投放频道:(1.列表, 2.限时抢购, 3. banner图 4. 游戏 5.卡频道 6.砍价频道 7.拼团频道 8专题) */ getCouponList: function(id) { let that = this; let data; data = { status: 0, merchantId: id, pageNum: that.data.page, pageSize: 15, } Http.get({ url: config.api.listByMerchant, data: data }).then(res => { that.setData({ couponList: res.data.page.list, qrCode:res.data.qrCode, }) }) .catch(err => { wx.showToast({ title: err.errMsg, icon: 'none', duration: 2000, mask: false }); }) }, /** * 获取多商铺列表 */ shopList: function(e) { wx.navigateTo({ url: `/pages/index/merchantList/index?id=${e.currentTarget.dataset.id}` }) }, // onShareAppMessage: function(res) { // var that = this; // var shareObj = { // title: that.data.data.title, // path: `/pages/index/index?couponChannelId=${that.data.couponChannelId}`, // success: function(res) { // if (res.errMsg == 'shareAppMessage:ok') {} // }, // fail: function(error) { // if (res.errMsg == 'shareAppMessage:fail cancel') {} else if (res.errMsg == 'shareAppMessage:fail') {} // } // }; // // 来自页面内的按钮的转发 // if (res.from === 'button') { // var eData = res.target.dataset.id; // shareObj.path = `/pages/index/index?couponChannelId=${eData}`; // } // // 返回shareObj // return shareObj; // }, })