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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.drawOtherContent(ctx, scale, options);
  139. that.drawAvatarimg(ctx, scale);
  140. that.drawqrCode(ctx, scale);
  141. wx.hideLoading();
  142. }
  143. });
  144. },
  145. //绘制微信头像
  146. drawAvatarimg(ctx, scale) {
  147. var that = this;
  148. //商户详情海报
  149. let src1 = that.data.avatarUrl + `?imageView/2/w/${100}/h/${100}`;
  150. let src2 = util.getProxyImgUrl(src1);
  151. wx.getImageInfo({
  152. src: src2,
  153. success: function(res) {
  154. that.darwAvatarArc(ctx, res.path, 10, 8, 35, 35);
  155. }
  156. });
  157. },
  158. // 商户海报绘制
  159. drawOtherContent(ctx, scale, options) {
  160. let that = this;
  161. console.log(ctx.measureText(this.data.nickName).width);
  162. //昵称
  163. this.drawNormalText(ctx, this.data.nickName, 48 * scale, 24 * scale, 16 * scale, "#000", "left", "middle", scale);
  164. this.drawNormalText(ctx, " 向您推荐", (ctx.measureText(this.data.nickName).width+60) * scale, 25 * 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. } else if (options && options.couponChannelId) {
  173. this.drawNormalText(ctx, "长按识别,进店去看看", 155 * scale, 470 * scale, 16 * scale, "#000", "left", "middle", scale);
  174. this.drawNormalText(ctx, this.data.data.title, 30 * scale, 295 * scale, 20 * scale, "#000", "left", "middle", scale);
  175. this.drawNormalText(ctx, "售价:" + this.data.data.salePriceStr + "元", 30 * scale, 320 * scale, 15 * scale, "#F4AA91", "left", "middle", scale);
  176. this.drawNormalText(ctx, "适用门店:", 30 * scale, 348 * scale, 16 * scale, "#000", "left", "middle", scale);
  177. //适用门店字体的排列
  178. for (let i = 0; i < that.data.data.merchantVoList.length;i++){
  179. let metrics;
  180. if(i==0){
  181. metrics = 35;
  182. that.drawNormalText(ctx, that.data.data.merchantVoList[i].merchantName, metrics, 375 * scale, 14 * scale, "#000", "left", "middle", scale);
  183. }else{
  184. let word = that.data.data.merchantVoList[i - 1].merchantName;
  185. let metrics = (ctx.measureText(word).width) * scale;
  186. metrics += metrics;
  187. that.drawNormalText(ctx,''+that.data.data.merchantVoList[i].merchantName, metrics, 375 * scale, 14 * scale, "#000", "left", "middle", scale);
  188. }
  189. }
  190. ctx.draw(true);
  191. }
  192. ctx.draw(true);
  193. },
  194. //绘制小程序码
  195. drawqrCode(ctx, scale) {
  196. let coImageWidth = parseInt(120 * scale);
  197. let coImageHeight = parseInt(120 * scale);
  198. let src1 = "";
  199. let src2 = "";
  200. if (this.data.qrCode) {
  201. src1 =
  202. this.data.qrCode + `?imageView/2/w/${coImageWidth}/h/${coImageHeight}`;
  203. src2 = util.getProxyImgUrl(src1);
  204. } else {
  205. src1 =this.data.data.qrCode +`?imageView/2/w/${coImageWidth}/h/${coImageHeight}`;
  206. src2 = util.getProxyImgUrl(src1);
  207. }
  208. wx.getImageInfo({
  209. src: src2,
  210. success: function(res) {
  211. ctx.drawImage(res.path, 25 * scale, 420 * scale, coImageWidth, coImageHeight);
  212. ctx.draw(true);
  213. }
  214. });
  215. },
  216. //截取商品名
  217. substrTile(str) {
  218. return str.substr(0, 5) + "...";
  219. },
  220. // 绘制只有一行的文字
  221. drawNormalText(ctx, str, x, y, font, style, align, baseLine) {
  222. ctx.setFontSize(font);
  223. ctx.setFillStyle(style);
  224. ctx.setTextAlign(align);
  225. ctx.setTextBaseline(baseLine);
  226. ctx.fillText(str, x, y);
  227. },
  228. /*
  229. * 绘制多行文本,自动换行,超出添加...
  230. *
  231. */
  232. canvasTextAutoLine: function(str,ctx,initX,initY,font,style,align,baseLine,lineHeight,maxWidth,row = 1) {
  233. var lineWidth = 0;
  234. var lastSubStrIndex = 0;
  235. var currentRow = 1;
  236. for (let i = 0; i < str.length; i++) {
  237. lineWidth += ctx.measureText(str[i]).width;
  238. if (lineWidth > maxWidth) {
  239. currentRow++;
  240. let newStr = str.substring(lastSubStrIndex, i);
  241. if (currentRow > row && str.length > i) {
  242. newStr = str.substring(lastSubStrIndex, i - 2) + "...";
  243. }
  244. ctx.setFontSize(font);
  245. ctx.setFillStyle(style);
  246. ctx.setTextAlign(align);
  247. ctx.setTextBaseline(baseLine);
  248. ctx.fillText(newStr, initX, initY);
  249. initY += lineHeight;
  250. lineWidth = 0;
  251. lastSubStrIndex = i;
  252. if (currentRow > row) {
  253. break;
  254. }
  255. }
  256. if (i == str.length - 1) {
  257. ctx.setFontSize(font);
  258. ctx.setFillStyle(style);
  259. ctx.setTextAlign(align);
  260. ctx.setTextBaseline(baseLine);
  261. ctx.fillText(str.substring(lastSubStrIndex, i + 1), initX, initY);
  262. }
  263. }
  264. },
  265. //绘制圆角图像
  266. darwAvatarArc: function(ctx, src, x, y, w, h = w) {
  267. /*
  268. ctx: 画布对象
  269. src: 头像缓存路径
  270. x: 头像起始位置 横坐标
  271. y: 头像起始位置 纵坐标
  272. w: 头像宽度
  273. h: 头像高度,不传为w
  274. */
  275. // 保存绘图上下文。
  276. ctx.save();
  277. // 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
  278. ctx.beginPath();
  279. // 设创建一个圆可以指定 起始弧度为 0,终止弧度为 2 * Math.PI。
  280. // 用 stroke 或者 fill 方法来在 canvas 中画弧线。
  281. ctx.arc(x + w / 2, y + h / 2, w / 2, 0, Math.PI * 2, false);
  282. /* 从原始画布中剪切任意形状和尺寸。
  283. 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(
  284. 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。
  285. */
  286. ctx.clip();
  287. // 画头像
  288. ctx.drawImage(src, x, y, w, h);
  289. // 恢复之前保存的绘图上下文。
  290. ctx.restore();
  291. // 将之前在绘图上下文中的描述(路径、变形、样式)画到 canvas 中。
  292. ctx.draw(true);
  293. },
  294. //绘制圆角矩形
  295. roundRect: function(ctx, x, y, w, h, r) {
  296. ctx.save();
  297. if (w < 2 * r) {
  298. r = w / 2;
  299. }
  300. if (h < 2 * r) {
  301. r = h / 2;
  302. }
  303. ctx.beginPath();
  304. // ctx.setStrokeStyle('white');
  305. ctx.setFillStyle('#fff')
  306. ctx.setLineWidth(4);
  307. ctx.moveTo(x + r, y);
  308. ctx.arcTo(x + w, y, x + w, y + h, r);
  309. ctx.arcTo(x + w, y + h, x, y + h, r);
  310. ctx.arcTo(x, y + h, x, y, r);
  311. ctx.arcTo(x, y, x + w, y, r);
  312. ctx.fill();
  313. ctx.closePath();
  314. ctx.draw(true);
  315. },
  316. //获取商户优惠劵信息
  317. getCouponList: function(id) {
  318. let that = this;
  319. let data;
  320. data = {
  321. status: 0,
  322. merchantId: id,
  323. pageNum: 1,
  324. pageSize: 15
  325. };
  326. Http.get({
  327. url: config.api.listByMerchant,
  328. data: data
  329. })
  330. .then(res => {
  331. that.setData({
  332. couponList: res.data.page.list,
  333. qrCode: res.data.qrCode
  334. });
  335. })
  336. .catch(err => {
  337. wx.showToast({
  338. title: err.errMsg,
  339. icon: "none",
  340. duration: 2000,
  341. mask: false
  342. });
  343. });
  344. },
  345. //获取头像和昵称
  346. getUserInfo: function() {
  347. let that = this;
  348. // 获取用户信息
  349. Http.get({
  350. url: config.api.getScore,
  351. data: {}
  352. }).then(res => {
  353. that.setData({
  354. nickName: res.data.nickName,
  355. avatarUrl: res.data.avatarUrl
  356. });
  357. });
  358. },
  359. //商场信息
  360. getMallInfo: function() {
  361. let that = this;
  362. // 获取用户信息
  363. Http.get({
  364. url: config.api.getMallInfo,
  365. data: {}
  366. }).then(res => {
  367. console.log(res);
  368. that.setData({
  369. mallname: res.data.name
  370. });
  371. });
  372. },
  373. /**
  374. * 保存图片
  375. */
  376. saveImage() {
  377. let that = this;
  378. wx.canvasToTempFilePath({
  379. x: 0,
  380. y: 0,
  381. width: this.data.windowWidth * this.data.canvasScale,
  382. height: this.data.totalHeight * this.data.canvasScale,
  383. canvasId: "myCanvas",
  384. success: function(res) {
  385. that.saveImageToPhotos(res.tempFilePath);
  386. },
  387. fail: function(res) {
  388. wx.showToast({
  389. title: "图片生成失败",
  390. icon: "none",
  391. duration: 2000
  392. });
  393. }
  394. });
  395. },
  396. saveImageToPhotos: function(tempFilePath) {
  397. wx.saveImageToPhotosAlbum({
  398. filePath: tempFilePath,
  399. success(result) {
  400. wx.showToast({
  401. title: "保存成功,从相册中分享到朋友圈吧",
  402. icon: "none",
  403. duration: 4000
  404. });
  405. },
  406. fail: function(err) {
  407. if (
  408. err.errMsg === "saveImageToPhotosAlbum:fail:auth denied" ||
  409. err.errMsg === "saveImageToPhotosAlbum:fail auth deny"
  410. ) {
  411. // 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
  412. wx.showModal({
  413. title: "提示",
  414. content: "需要您授权保存相册",
  415. showCancel: false,
  416. success: modalSuccess => {
  417. wx.openSetting({
  418. success(settingdata) {
  419. console.log("settingdata", settingdata);
  420. if (settingdata.authSetting["scope.writePhotosAlbum"]) {
  421. wx.showModal({
  422. title: "提示",
  423. content: "获取权限成功,再次点击图片即可保存",
  424. showCancel: false
  425. });
  426. } else {
  427. wx.showModal({
  428. title: "提示",
  429. content: "获取权限失败,将无法保存到相册哦~",
  430. showCancel: false
  431. });
  432. }
  433. },
  434. fail(failData) {
  435. console.log("failData", failData);
  436. },
  437. complete(finishData) {
  438. console.log("finishData", finishData);
  439. }
  440. });
  441. }
  442. });
  443. }
  444. }
  445. });
  446. }
  447. });