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- 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);
- }
- });
- }
- });
- }
- }
- });
- }
- });
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