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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, 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, 8, 35, 35);
  156. }
  157. });
  158. },
  159. // 商户海报绘制
  160. drawOtherContent(ctx, scale, options) {
  161. let that = this;
  162. console.log(ctx.measureText(this.data.nickName).width);
  163. //昵称
  164. this.drawNormalText(ctx, this.data.nickName, 48 * scale, 24 * scale, 16 * scale, "#000", "left", "middle", scale);
  165. this.drawNormalText(ctx, " 向您推荐", (ctx.measureText(this.data.nickName).width+60) * scale, 25 * scale, 16 * scale, "#848484", "left", "middle", scale);
  166. this.drawNormalText(ctx, "---" + this.data.mallname + "---", 175 * scale, 500 * scale, 16 * scale, "#000", "left", "middle", scale);
  167. if (options && options.merchantId) {
  168. //店铺名
  169. this.drawNormalText(ctx, "商户名称:" + this.data.data.merchantName, 30 * scale, 295 * scale, 20 * scale, "#000", "left", "middle", scale);
  170. 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);
  171. this.drawNormalText(ctx, "商户电话:" + this.data.data.merchantLinkPhone, 30 * scale, 348 * scale, 16 * scale, "#000", "left", "middle", scale);
  172. this.drawNormalText(ctx, "长按识别,进店去看看", 155 * scale, 470 * scale, 16 * scale, "#000", "left", "middle", scale);
  173. } else if (options && options.couponChannelId) {
  174. this.drawNormalText(ctx, "长按识别,进店去看看", 155 * scale, 470 * scale, 16 * scale, "#000", "left", "middle", scale);
  175. this.drawNormalText(ctx, this.data.data.title, 30 * scale, 295 * scale, 20 * scale, "#000", "left", "middle", scale);
  176. this.drawNormalText(ctx, "售价:" + this.data.data.salePriceStr + "元", 30 * scale, 320 * scale, 15 * scale, "#F4AA91", "left", "middle", scale);
  177. this.drawNormalText(ctx, "适用门店:", 30 * scale, 348 * scale, 16 * scale, "#000", "left", "middle", scale);
  178. //适用门店字体的排列
  179. for (let i = 0; i < that.data.data.merchantVoList.length;i++){
  180. let metrics;
  181. if(i==0){
  182. metrics = 35;
  183. that.drawNormalText(ctx, that.data.data.merchantVoList[i].merchantName, metrics, 375 * scale, 14 * scale, "#000", "left", "middle", scale);
  184. }else{
  185. let word = that.data.data.merchantVoList[i - 1].merchantName;
  186. let metrics = (ctx.measureText(word).width) * scale;
  187. metrics += metrics;
  188. that.drawNormalText(ctx,''+that.data.data.merchantVoList[i].merchantName, metrics, 375 * scale, 14 * scale, "#000", "left", "middle", scale);
  189. }
  190. }
  191. ctx.draw(true);
  192. }
  193. ctx.draw(true);
  194. },
  195. //绘制小程序码
  196. drawqrCode(ctx, scale) {
  197. let coImageWidth = parseInt(120 * scale);
  198. let coImageHeight = parseInt(120 * scale);
  199. let src1 = "";
  200. let src2 = "";
  201. if (this.data.qrCode) {
  202. src1 =
  203. this.data.qrCode + `?imageView/2/w/${coImageWidth}/h/${coImageHeight}`;
  204. src2 = util.getProxyImgUrl(src1);
  205. } else {
  206. src1 =
  207. this.data.data.qrCode +
  208. `?imageView/2/w/${coImageWidth}/h/${coImageHeight}`;
  209. src2 = util.getProxyImgUrl(src1);
  210. }
  211. wx.getImageInfo({
  212. src: src2,
  213. success: function(res) {
  214. ctx.drawImage(res.path, 25 * scale, 420 * scale, coImageWidth, coImageHeight);
  215. ctx.draw(true);
  216. }
  217. });
  218. },
  219. // 绘制活动图片
  220. drawOtherImage(ctx, scale) {
  221. var that = this;
  222. // 如果该商户有活动商品
  223. if (that.data.couponList.length > 0) {
  224. let cotentImageWidth = parseInt(80 * scale);
  225. let cotentImageHeight = parseInt(80 * scale);
  226. for (let i = 0; i < that.data.couponList.length; i++) {
  227. let imageItem = that.data.couponList[i].coverImg;
  228. let src1 = imageItem + `?imageView/2/w/${cotentImageWidth}/h/${cotentImageHeight}`;
  229. let src2 = util.getProxyImgUrl(src1);
  230. wx.getImageInfo({
  231. src: src2,
  232. success: function(res) {
  233. ctx.drawImage(res.path, 35 * scale + i * 110 * scale, 300 * scale, cotentImageWidth, cotentImageHeight);
  234. }
  235. });
  236. }
  237. }
  238. that.drawqrCode(ctx, scale);
  239. },
  240. //截取商品名
  241. substrTile(str) {
  242. return str.substr(0, 5) + "...";
  243. },
  244. // 绘制只有一行的文字
  245. drawNormalText(ctx, str, x, y, font, style, align, baseLine) {
  246. ctx.setFontSize(font);
  247. ctx.setFillStyle(style);
  248. ctx.setTextAlign(align);
  249. ctx.setTextBaseline(baseLine);
  250. ctx.fillText(str, x, y);
  251. },
  252. /*
  253. * 绘制多行文本,自动换行,超出添加...
  254. *
  255. */
  256. canvasTextAutoLine: function(
  257. str,
  258. ctx,
  259. initX,
  260. initY,
  261. lineHeight,
  262. maxWidth,
  263. row = 1
  264. ) {
  265. var lineWidth = 0;
  266. var lastSubStrIndex = 0;
  267. var currentRow = 1;
  268. for (let i = 0; i < str.length; i++) {
  269. lineWidth += ctx.measureText(str[i]).width;
  270. if (lineWidth > maxWidth) {
  271. currentRow++;
  272. let newStr = str.substring(lastSubStrIndex, i);
  273. if (currentRow > row && str.length > i) {
  274. newStr = str.substring(lastSubStrIndex, i - 2) + "...";
  275. }
  276. ctx.fillText(newStr, initX, initY);
  277. initY += lineHeight;
  278. lineWidth = 0;
  279. lastSubStrIndex = i;
  280. if (currentRow > row) {
  281. break;
  282. }
  283. }
  284. if (i == str.length - 1) {
  285. ctx.fillText(str.substring(lastSubStrIndex, i + 1), initX, initY);
  286. }
  287. }
  288. },
  289. //绘制圆角图像
  290. darwAvatarArc: function(ctx, src, x, y, w, h = w) {
  291. /*
  292. ctx: 画布对象
  293. src: 头像缓存路径
  294. x: 头像起始位置 横坐标
  295. y: 头像起始位置 纵坐标
  296. w: 头像宽度
  297. h: 头像高度,不传为w
  298. */
  299. // 保存绘图上下文。
  300. ctx.save();
  301. // 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
  302. ctx.beginPath();
  303. // 设创建一个圆可以指定 起始弧度为 0,终止弧度为 2 * Math.PI。
  304. // 用 stroke 或者 fill 方法来在 canvas 中画弧线。
  305. ctx.arc(x + w / 2, y + h / 2, w / 2, 0, Math.PI * 2, false);
  306. /* 从原始画布中剪切任意形状和尺寸。
  307. 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(
  308. 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。
  309. */
  310. ctx.clip();
  311. // 画头像
  312. ctx.drawImage(src, x, y, w, h);
  313. // 恢复之前保存的绘图上下文。
  314. ctx.restore();
  315. // 将之前在绘图上下文中的描述(路径、变形、样式)画到 canvas 中。
  316. ctx.draw(true);
  317. },
  318. //绘制圆角矩形
  319. roundRect: function(ctx, x, y, w, h, r) {
  320. ctx.save();
  321. if (w < 2 * r) {
  322. r = w / 2;
  323. }
  324. if (h < 2 * r) {
  325. r = h / 2;
  326. }
  327. ctx.beginPath();
  328. // ctx.setStrokeStyle('white');
  329. ctx.setFillStyle('#fff')
  330. ctx.setLineWidth(4);
  331. ctx.moveTo(x + r, y);
  332. ctx.arcTo(x + w, y, x + w, y + h, r);
  333. ctx.arcTo(x + w, y + h, x, y + h, r);
  334. ctx.arcTo(x, y + h, x, y, r);
  335. ctx.arcTo(x, y, x + w, y, r);
  336. ctx.fill();
  337. ctx.closePath();
  338. ctx.draw(true);
  339. },
  340. //获取商户优惠劵信息
  341. getCouponList: function(id) {
  342. let that = this;
  343. let data;
  344. data = {
  345. status: 0,
  346. merchantId: id,
  347. pageNum: 1,
  348. pageSize: 15
  349. };
  350. Http.get({
  351. url: config.api.listByMerchant,
  352. data: data
  353. })
  354. .then(res => {
  355. that.setData({
  356. couponList: res.data.page.list,
  357. qrCode: res.data.qrCode
  358. });
  359. })
  360. .catch(err => {
  361. wx.showToast({
  362. title: err.errMsg,
  363. icon: "none",
  364. duration: 2000,
  365. mask: false
  366. });
  367. });
  368. },
  369. //获取头像和昵称
  370. getUserInfo: function() {
  371. let that = this;
  372. // 获取用户信息
  373. Http.get({
  374. url: config.api.getScore,
  375. data: {}
  376. }).then(res => {
  377. that.setData({
  378. nickName: res.data.nickName,
  379. avatarUrl: res.data.avatarUrl
  380. });
  381. });
  382. },
  383. //商场信息
  384. getMallInfo: function() {
  385. let that = this;
  386. // 获取用户信息
  387. Http.get({
  388. url: config.api.getMallInfo,
  389. data: {}
  390. }).then(res => {
  391. console.log(res);
  392. that.setData({
  393. mallname: res.data.name
  394. });
  395. });
  396. },
  397. /**
  398. * 保存图片
  399. */
  400. saveImage() {
  401. let that = this;
  402. wx.canvasToTempFilePath({
  403. x: 0,
  404. y: 0,
  405. width: this.data.windowWidth * this.data.canvasScale,
  406. height: this.data.totalHeight * this.data.canvasScale,
  407. canvasId: "myCanvas",
  408. success: function(res) {
  409. that.saveImageToPhotos(res.tempFilePath);
  410. },
  411. fail: function(res) {
  412. wx.showToast({
  413. title: "图片生成失败",
  414. icon: "none",
  415. duration: 2000
  416. });
  417. }
  418. });
  419. },
  420. saveImageToPhotos: function(tempFilePath) {
  421. wx.saveImageToPhotosAlbum({
  422. filePath: tempFilePath,
  423. success(result) {
  424. wx.showToast({
  425. title: "保存成功,从相册中分享到朋友圈吧",
  426. icon: "none",
  427. duration: 4000
  428. });
  429. },
  430. fail: function(err) {
  431. if (
  432. err.errMsg === "saveImageToPhotosAlbum:fail:auth denied" ||
  433. err.errMsg === "saveImageToPhotosAlbum:fail auth deny"
  434. ) {
  435. // 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
  436. wx.showModal({
  437. title: "提示",
  438. content: "需要您授权保存相册",
  439. showCancel: false,
  440. success: modalSuccess => {
  441. wx.openSetting({
  442. success(settingdata) {
  443. console.log("settingdata", settingdata);
  444. if (settingdata.authSetting["scope.writePhotosAlbum"]) {
  445. wx.showModal({
  446. title: "提示",
  447. content: "获取权限成功,再次点击图片即可保存",
  448. showCancel: false
  449. });
  450. } else {
  451. wx.showModal({
  452. title: "提示",
  453. content: "获取权限失败,将无法保存到相册哦~",
  454. showCancel: false
  455. });
  456. }
  457. },
  458. fail(failData) {
  459. console.log("failData", failData);
  460. },
  461. complete(finishData) {
  462. console.log("finishData", finishData);
  463. }
  464. });
  465. }
  466. });
  467. }
  468. }
  469. });
  470. }
  471. });