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  1. var config = require("../../config/config.js");
  2. var app = getApp();
  3. const Http = require("../../utils/HttpBasics");
  4. const util = require("../../utils/util");
  5. const imgurl = require("../../utils/imgurl");
  6. Page({
  7. /**
  8. * 页面的初始数据
  9. */
  10. data: {
  11. poterbg: imgurl.poterbg.url,
  12. windowWidth: wx.getSystemInfoSync().windowWidth,
  13. windowHeight: wx.getSystemInfoSync().screenHeight,
  14. totalHeight: 0,
  15. mallname: '', //商场名字
  16. qrCodeL: "", //小程序码
  17. couponList: [], //活动劵列表
  18. 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
  19. },
  20. /**
  21. * 生命周期函数--监听页面加载
  22. */
  23. onLoad: function(options) {
  24. let that = this;
  25. //劵详情
  26. if (options && options.couponChannelId) {
  27. that.getDetail(options.couponChannelId);
  28. } else if (options && options.merchantId) {
  29. that.getList(options.merchantId);
  30. that.getCouponList(options.merchantId);
  31. }
  32. this.getUserInfo();
  33. this.getMallInfo();
  34. this.begainDrawShareImage(options);
  35. },
  36. /**
  37. * 获取劵详情
  38. */
  39. getDetail: function(couponChannelId) {
  40. let that = this;
  41. // 获取用户信息
  42. Http.get({
  43. url: config.api.couponDetail,
  44. data: {
  45. couponChannelId: couponChannelId
  46. }
  47. }).then(res => {
  48. that.setData({
  49. data: res.data
  50. });
  51. });
  52. },
  53. /**
  54. * 获取商户详情
  55. */
  56. getList: function(id) {
  57. let that = this;
  58. let data;
  59. data = {
  60. pageNum: 1,
  61. pageSize: 15,
  62. id: id
  63. };
  64. Http.get({
  65. url: config.api.merchantList,
  66. data: data
  67. })
  68. .then(res => {
  69. that.setData({
  70. data: res.data.list[0]
  71. });
  72. })
  73. .catch(err => {
  74. wx.showToast({
  75. title: err.errMsg,
  76. icon: "none",
  77. duration: 2000,
  78. mask: false
  79. });
  80. });
  81. },
  82. /**
  83. * 绘制分享海报
  84. */
  85. begainDrawShareImage(options) {
  86. wx.showLoading({
  87. title: "生成中..."
  88. });
  89. var that = this;
  90. // 适配屏幕
  91. let scale = this.data.windowWidth / 375.0
  92. console.log(scale)
  93. this.setData({
  94. totalHeight: 667 * scale
  95. })
  96. // 获取Canvas
  97. let ctx = wx.createCanvasContext("myCanvas");
  98. // 获取宽高
  99. let wW = that.data.windowWidth;
  100. let wH = that.data.windowHeight;
  101. // 放大 因为不放大的话,生成的分享图会模糊。暂时先注释
  102. ctx.scale(this.data.canvasScale, this.data.canvasScale);
  103. // 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
  104. let bgimg1 = that.data.poterbg + `?imageView/2/w/${wW}/h/${wH}`;
  105. let bgimg2 = util.getProxyImgUrl(bgimg1);
  106. wx.getImageInfo({
  107. src: bgimg2,
  108. success: function(res) {
  109. that.drawshopimg(ctx, scale, options);
  110. ctx.draw(true);
  111. }
  112. });
  113. },
  114. //绘制商品图片
  115. drawshopimg(ctx, scale, options) {
  116. var that = this;
  117. let topImageWidth = parseInt(375 * scale); // 因为小数有时候会请求不到图片,所以转成int
  118. let topImageHeight = parseInt(260 * scale);
  119. let src1 = "";
  120. let src2 = "";
  121. //劵详情海报
  122. if (options && options.couponChannelId) {
  123. src1 = that.data.data.coverImg + `?imageView/2/w/${topImageWidth}/h/${topImageHeight}`;
  124. src2 = util.getProxyImgUrl(src1);
  125. } else if (options && options.merchantId) {
  126. //商户详情海报
  127. src1 = that.data.data.merchantImgUrl + `?imageView/2/w/${topImageWidth}/h/${topImageHeight}`;
  128. src2 = util.getProxyImgUrl(src1);
  129. }
  130. wx.getImageInfo({
  131. src: src2,
  132. success: function(res) {
  133. // 绘制白色背景
  134. ctx.setFillStyle("#fbfbfb");
  135. ctx.fillRect(0, 0, that.data.windowWidth, that.data.windowHeight);
  136. ctx.drawImage(res.path, 0, 50 * scale, topImageWidth, topImageHeight);
  137. that.roundRect(ctx, 15 * scale, 270 * scale, 325 * scale, 125 * scale, 10);
  138. that.drawOtherImage(ctx, scale);
  139. that.drawOtherContent(ctx, scale, options);
  140. that.drawAvatarimg(ctx, scale);
  141. that.drawqrCode(ctx, scale);
  142. wx.hideLoading();
  143. }
  144. });
  145. },
  146. //绘制微信头像
  147. drawAvatarimg(ctx, scale) {
  148. var that = this;
  149. //商户详情海报
  150. let src1 = that.data.avatarUrl + `?imageView/2/w/${100}/h/${100}`;
  151. let src2 = util.getProxyImgUrl(src1);
  152. wx.getImageInfo({
  153. src: src2,
  154. success: function(res) {
  155. that.darwAvatarArc(ctx, res.path, 10 * scale, 8 * scale, 35* scale, 35* scale);
  156. }
  157. });
  158. },
  159. // 商户海报绘制
  160. drawOtherContent(ctx, scale, options) {
  161. let that = this;
  162. //昵称
  163. this.drawNormalText(ctx, this.data.nickName, 50 * scale, 26 * scale, 16 * scale, "#000", "left", "middle", scale);
  164. this.drawNormalText(ctx, " 向您推荐", 120 * scale, 26 * scale, 16 * scale, "#848484", "left", "middle", scale);
  165. this.drawNormalText(ctx, "---" + this.data.mallname + "---", 175 * scale, 500 * scale, 16 * scale, "#000", "left", "middle", scale);
  166. if (options && options.merchantId) {
  167. //店铺名
  168. this.drawNormalText(ctx, "商户名称:" + this.data.data.merchantName, 30 * scale, 295 * scale, 20 * scale, "#000", "left", "middle", scale);
  169. 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);
  170. this.drawNormalText(ctx, "商户电话:" + this.data.data.merchantLinkPhone, 30 * scale, 348 * scale, 16 * scale, "#000", "left", "middle", scale);
  171. this.drawNormalText(ctx, "长按识别,进店去看看", 155 * scale, 470 * scale, 16 * scale, "#000", "left", "middle", scale);
  172. // if (this.data.couponList.length > 0) {
  173. // for (let i = 0; i < this.data.couponList.length; i++) {
  174. // // 第一个商品信息
  175. // this.drawNormalText(ctx, this.substrTile(this.data.couponList[1].title), 30 * scale, 396 * scale, 14 * scale, "#000", "left", "middle", scale);
  176. // this.drawNormalText(ctx, "价格:" + this.data.couponList[1].salePrice, 30 * scale, 416 * scale, 14 * scale, "#FF3232", "left", "middle", scale);
  177. // //第二个商品信息
  178. // this.drawNormalText(ctx, this.substrTile(this.data.couponList[2].title), 145 * scale, 396 * scale, 14 * scale, "#000", "left", "middle", scale);
  179. // this.drawNormalText(ctx, "价格:" + this.data.couponList[2].salePrice, 145 * scale, 416 * scale, 14 * scale, "#FF3232", "left", "middle", scale);
  180. // //第三个商品信息
  181. // this.drawNormalText(ctx, this.substrTile(this.data.couponList[3].title), 260 * scale, 396 * scale, 14 * scale, "#000", "left", "middle", scale);
  182. // this.drawNormalText(ctx, "价格:" + this.data.couponList[3].salePrice, 260 * scale, 416 * scale, 14 * scale, "#FF3232", "left", "middle", scale);
  183. // }
  184. // }
  185. } else if (options && options.couponChannelId) {
  186. this.drawNormalText(ctx, "长按识别,进店去看看", 155 * scale, 470 * scale, 16 * scale, "#000", "left", "middle", scale);
  187. this.drawNormalText(ctx, this.data.data.title, 30 * scale, 295 * scale, 20 * scale, "#000", "left", "middle", scale);
  188. this.drawNormalText(ctx, "售价:" + this.data.data.salePriceStr + "元", 30 * scale, 320 * scale, 15 * scale, "#F4AA91", "left", "middle", scale);
  189. this.drawNormalText(ctx, "适用门店:", 30 * scale, 348 * scale, 16 * scale, "#000", "left", "middle", scale);
  190. //适用门店字体的排列
  191. for (let i = 0; i < that.data.data.merchantVoList.length;i++){
  192. let metrics;
  193. if(i==0){
  194. metrics = 35;
  195. that.drawNormalText(ctx, that.data.data.merchantVoList[i].merchantName, metrics, 375 * scale, 14 * scale, "#000", "left", "middle", scale);
  196. }else{
  197. let word = that.data.data.merchantVoList[i - 1].merchantName;
  198. let metrics = (ctx.measureText(word).width) * scale;
  199. metrics += metrics;
  200. that.drawNormalText(ctx,'、'+that.data.data.merchantVoList[i].merchantName, metrics, 375 * scale, 14 * scale, "#000", "left", "middle", scale);
  201. }
  202. }
  203. ctx.draw(true);
  204. }
  205. ctx.draw(true);
  206. },
  207. //绘制小程序码
  208. drawqrCode(ctx, scale) {
  209. let coImageWidth = parseInt(120 * scale);
  210. let coImageHeight = parseInt(120 * scale);
  211. let src1 = "";
  212. let src2 = "";
  213. if (this.data.qrCode) {
  214. src1 =this.data.qrCode + `?imageView/2/w/${coImageWidth}/h/${coImageHeight}`;
  215. src2 = util.getProxyImgUrl(src1);
  216. } else {
  217. src1 =this.data.data.qrCode +`?imageView/2/w/${coImageWidth}/h/${coImageHeight}`;
  218. src2 = util.getProxyImgUrl(src1);
  219. }
  220. wx.getImageInfo({
  221. src: src2,
  222. success: function(res) {
  223. ctx.drawImage(res.path, 25 * scale, 420 * scale, coImageWidth, coImageHeight);
  224. ctx.draw(true);
  225. }
  226. });
  227. },
  228. // 绘制活动图片
  229. drawOtherImage(ctx, scale) {
  230. var that = this;
  231. // 如果该商户有活动商品
  232. if (that.data.couponList.length > 0) {
  233. let cotentImageWidth = parseInt(80 * scale);
  234. let cotentImageHeight = parseInt(80 * scale);
  235. for (let i = 0; i < that.data.couponList.length; i++) {
  236. let imageItem = that.data.couponList[i].coverImg;
  237. let src1 = imageItem + `?imageView/2/w/${cotentImageWidth}/h/${cotentImageHeight}`;
  238. let src2 = util.getProxyImgUrl(src1);
  239. wx.getImageInfo({
  240. src: src2,
  241. success: function(res) {
  242. ctx.drawImage(res.path, 35 * scale + i * 110 * scale, 300 * scale, cotentImageWidth, cotentImageHeight);
  243. }
  244. });
  245. }
  246. }
  247. that.drawqrCode(ctx, scale);
  248. },
  249. //截取商品名
  250. substrTile(str) {
  251. return str.substr(0, 5) + "...";
  252. },
  253. // 绘制只有一行的文字
  254. drawNormalText(ctx, str, x, y, font, style, align, baseLine) {
  255. ctx.setFontSize(font);
  256. ctx.setFillStyle(style);
  257. ctx.setTextAlign(align);
  258. ctx.setTextBaseline(baseLine);
  259. ctx.fillText(str, x, y);
  260. },
  261. /*
  262. * 绘制多行文本,自动换行,超出添加...
  263. *
  264. */
  265. canvasTextAutoLine: function(
  266. str,
  267. ctx,
  268. initX,
  269. initY,
  270. lineHeight,
  271. maxWidth,
  272. row = 1
  273. ) {
  274. var lineWidth = 0;
  275. var lastSubStrIndex = 0;
  276. var currentRow = 1;
  277. for (let i = 0; i < str.length; i++) {
  278. lineWidth += ctx.measureText(str[i]).width;
  279. if (lineWidth > maxWidth) {
  280. currentRow++;
  281. let newStr = str.substring(lastSubStrIndex, i);
  282. if (currentRow > row && str.length > i) {
  283. newStr = str.substring(lastSubStrIndex, i - 2) + "...";
  284. }
  285. ctx.fillText(newStr, initX, initY);
  286. initY += lineHeight;
  287. lineWidth = 0;
  288. lastSubStrIndex = i;
  289. if (currentRow > row) {
  290. break;
  291. }
  292. }
  293. if (i == str.length - 1) {
  294. ctx.fillText(str.substring(lastSubStrIndex, i + 1), initX, initY);
  295. }
  296. }
  297. },
  298. //绘制圆角图像
  299. darwAvatarArc: function(ctx, src, x, y, w, h = w) {
  300. /*
  301. ctx: 画布对象
  302. src: 头像缓存路径
  303. x: 头像起始位置 横坐标
  304. y: 头像起始位置 纵坐标
  305. w: 头像宽度
  306. h: 头像高度,不传为w
  307. */
  308. // 保存绘图上下文。
  309. ctx.save();
  310. // 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
  311. ctx.beginPath();
  312. // 设创建一个圆可以指定 起始弧度为 0,终止弧度为 2 * Math.PI。
  313. // 用 stroke 或者 fill 方法来在 canvas 中画弧线。
  314. ctx.arc(x + w / 2, y + h / 2, w / 2, 0, Math.PI * 2, false);
  315. /* 从原始画布中剪切任意形状和尺寸。
  316. 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(
  317. 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。
  318. */
  319. ctx.clip();
  320. // 画头像
  321. ctx.drawImage(src, x, y, w, h);
  322. // 恢复之前保存的绘图上下文。
  323. ctx.restore();
  324. // 将之前在绘图上下文中的描述(路径、变形、样式)画到 canvas 中。
  325. ctx.draw(true);
  326. },
  327. //绘制圆角矩形
  328. roundRect: function(ctx, x, y, w, h, r) {
  329. ctx.save();
  330. if (w < 2 * r) {
  331. r = w / 2;
  332. }
  333. if (h < 2 * r) {
  334. r = h / 2;
  335. }
  336. ctx.beginPath();
  337. // ctx.setStrokeStyle('white');
  338. ctx.setFillStyle('#fff')
  339. ctx.setLineWidth(4);
  340. ctx.moveTo(x + r, y);
  341. ctx.arcTo(x + w, y, x + w, y + h, r);
  342. ctx.arcTo(x + w, y + h, x, y + h, r);
  343. ctx.arcTo(x, y + h, x, y, r);
  344. ctx.arcTo(x, y, x + w, y, r);
  345. ctx.fill();
  346. ctx.closePath();
  347. ctx.draw(true);
  348. },
  349. //获取商户优惠劵信息
  350. getCouponList: function(id) {
  351. let that = this;
  352. let data;
  353. data = {
  354. status: 0,
  355. merchantId: id,
  356. pageNum: 1,
  357. pageSize: 15
  358. };
  359. Http.get({
  360. url: config.api.listByMerchant,
  361. data: data
  362. })
  363. .then(res => {
  364. that.setData({
  365. couponList: res.data.page.list,
  366. qrCode: res.data.qrCode
  367. });
  368. })
  369. .catch(err => {
  370. wx.showToast({
  371. title: err.errMsg,
  372. icon: "none",
  373. duration: 2000,
  374. mask: false
  375. });
  376. });
  377. },
  378. //获取头像和昵称
  379. getUserInfo: function() {
  380. let that = this;
  381. // 获取用户信息
  382. Http.get({
  383. url: config.api.getScore,
  384. data: {}
  385. }).then(res => {
  386. that.setData({
  387. nickName: res.data.nickName,
  388. avatarUrl: res.data.avatarUrl
  389. });
  390. });
  391. },
  392. //商场信息
  393. getMallInfo: function() {
  394. let that = this;
  395. // 获取用户信息
  396. Http.get({
  397. url: config.api.getMallInfo,
  398. data: {}
  399. }).then(res => {
  400. console.log(res);
  401. that.setData({
  402. mallname: res.data.name
  403. });
  404. });
  405. },
  406. /**
  407. * 保存图片
  408. */
  409. saveImage() {
  410. let that = this;
  411. wx.canvasToTempFilePath({
  412. x: 0,
  413. y: 5,
  414. width: this.data.windowWidth * this.data.canvasScale,
  415. height: this.data.totalHeight * this.data.canvasScale,
  416. canvasId: "myCanvas",
  417. success: function(res) {
  418. that.saveImageToPhotos(res.tempFilePath);
  419. },
  420. fail: function(res) {
  421. wx.showToast({
  422. title: "图片生成失败",
  423. icon: "none",
  424. duration: 2000
  425. });
  426. }
  427. });
  428. },
  429. saveImageToPhotos: function(tempFilePath) {
  430. wx.saveImageToPhotosAlbum({
  431. filePath: tempFilePath,
  432. success(result) {
  433. wx.showToast({
  434. title: "保存成功,从相册中分享到朋友圈吧",
  435. icon: "none",
  436. duration: 4000
  437. });
  438. },
  439. fail: function(err) {
  440. if (
  441. err.errMsg === "saveImageToPhotosAlbum:fail:auth denied" ||
  442. err.errMsg === "saveImageToPhotosAlbum:fail auth deny"
  443. ) {
  444. // 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
  445. wx.showModal({
  446. title: "提示",
  447. content: "需要您授权保存相册",
  448. showCancel: false,
  449. success: modalSuccess => {
  450. wx.openSetting({
  451. success(settingdata) {
  452. console.log("settingdata", settingdata);
  453. if (settingdata.authSetting["scope.writePhotosAlbum"]) {
  454. wx.showModal({
  455. title: "提示",
  456. content: "获取权限成功,再次点击图片即可保存",
  457. showCancel: false
  458. });
  459. } else {
  460. wx.showModal({
  461. title: "提示",
  462. content: "获取权限失败,将无法保存到相册哦~",
  463. showCancel: false
  464. });
  465. }
  466. },
  467. fail(failData) {
  468. console.log("failData", failData);
  469. },
  470. complete(finishData) {
  471. console.log("finishData", finishData);
  472. }
  473. });
  474. }
  475. });
  476. }
  477. }
  478. });
  479. }
  480. });