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@ -2,6 +2,7 @@ |
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let device = wx.getSystemInfoSync(); |
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let device = wx.getSystemInfoSync(); |
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const ratio = device.windowWidth / 750; |
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const ratio = device.windowWidth / 750; |
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import commonApi from "../../../utils/https/common" |
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import commonApi from "../../../utils/https/common" |
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import QRCode from '../../../utils/weapp-qrcode.js' |
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let app = getApp() |
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let app = getApp() |
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Page({ |
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Page({ |
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@ -16,7 +17,9 @@ Page({ |
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comment: [], |
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comment: [], |
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commentTotal: 0, |
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commentTotal: 0, |
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retailId: "", |
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retailId: "", |
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retailSkuId:"" |
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retailSkuId: "", |
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shareImg: null, |
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showShareFlag: false |
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}, |
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}, |
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/** |
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/** |
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@ -161,6 +164,258 @@ Page({ |
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}) |
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}) |
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}, |
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}, |
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// 分享
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share: function () { |
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if (!wx.getStorageSync("jstrip_token")) { |
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commonApi.user_post("user/getMyInfo", {}).then(res => { |
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}) |
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return; |
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} |
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if (!this.data.shareImg) { |
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wx.showToast({ |
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title: '图片生成中，稍后再试', |
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icon: 'none' |
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}) |
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return; |
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} |
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this.setData({ |
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showShareFlag: !this.data.showShareFlag |
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}) |
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}, |
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// 保存
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save() { |
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let url = this.data.shareImg, that = this; |
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wx.authorize({ |
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/* 这个就是保存相册的 */ |
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scope: 'scope.writePhotosAlbum', |
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success() { |
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wx.saveImageToPhotosAlbum({ |
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filePath: url, |
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success(res) { |
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wx.showToast({ |
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title: '保存成功', |
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icon: "success" |
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}) |
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that.setData({ |
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showShareFlag: !this.data.showShareFlag |
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}) |
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}, |
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fail(res) { |
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wx.showToast({ |
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title: '保存失败', |
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icon: 'none' |
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}) |
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} |
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}) |
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}, |
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complete(res) { |
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console.log(res); |
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/* 这里判断一下如果没有授权重新打开设置选项 */ |
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wx.getSetting({ |
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success(res) { |
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if (!res.authSetting['scope.writePhotosAlbum']) { |
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/* 打开设置的方法 */ |
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// opensit();
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wx.showToast({ |
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title: '请打开权限后再试', |
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icon: 'none' |
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}) |
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} |
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} |
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}); |
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} |
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}); |
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}, |
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// 绘制海报
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drawImg: function () { |
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var that = this, userinfo = wx.getStorageSync('jstrip_userInfo'); |
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if (!userinfo) { |
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// 去登录
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return false; |
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} |
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const ctx = wx.createCanvasContext('imageCanvas'); |
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// const device = wx.getSystemInfoSync();
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// const ratio = device.screenWidth / 750;
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// 先获取到图片信息
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let promise2 = new Promise(function (resolve, reject) { |
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wx.getImageInfo({ |
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src: that.data.info.headimg, |
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success: function (res) { |
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resolve(res); |
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}, |
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fail: function (res) { |
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reject(res); |
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} |
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}) |
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}) |
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let promise3 = new Promise(function (resolve, reject) { |
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let userid = wx.getStorageSync('jstrip_userid') |
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new QRCode('myQrcode', { |
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text: 'https://m.cloud.sz-trip.com/LineDetail?id=' + that.data.info.id + '&sharedUserId=' + userid + '&channel=-1', |
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width: 500, |
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height: 500, |
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padding: 12, // 生成二维码四周自动留边宽度，不传入默认为0
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correctLevel: QRCode.CorrectLevel.H, // 二维码可辨识度
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callback: (res) => { |
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resolve(res); |
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} |
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}) |
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}) |
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//成功得到图片信息后，开始绘图
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Promise.all([promise2, promise3]).then(imgs => { |
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ctx.save(); |
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ctx.beginPath(); //开始绘制
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that.handleBorderRect(ctx, 0, 0, 551 * ratio, 407 * ratio, 25 * ratio, '#ccc') |
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ctx.clip();//画好了圆 剪切 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 这也是我们要save上下文的原因
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ctx.drawImage(imgs[0].path, 0, 0, 551 * ratio, 407 * ratio); |
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ctx.restore(); |
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ctx.save(); |
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that.handleBorderRect2(ctx, 0, 407 * ratio, 551 * ratio, 236 * ratio, 25 * ratio, '#fff') |
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ctx.restore(); |
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// 绘制二维码
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ctx.drawImage(imgs[1].path, 373 * ratio, 495 * ratio, 137 * ratio, 137 * ratio); |
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// 开始文字绘制
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ctx.setFillStyle("#000"); |
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ctx.setFontSize(30 * ratio); //字大小
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ctx.setTextAlign('left'); //是否居中显示，参考点画布中线
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that.drawText(ctx, that.data.info.title, 25 * ratio, 450 * ratio, 480 * ratio, ratio); |
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// 售价
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ctx.setFillStyle("#D62828"); |
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ctx.setFontSize(40 * ratio); //字大小
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ctx.setTextAlign('left'); //是否居中显示，参考点画布中线
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let price = that.data.info.price ? ("￥" + (that.data.info.price / 100)) : '免费'; |
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let width = ctx.measureText(price).width; |
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ctx.fillText(price, 25 * ratio, 620 * ratio); |
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// 副标题
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ctx.setFillStyle("#999999"); |
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ctx.setFontSize(28 * ratio); //字大小
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ctx.setTextAlign('left'); //是否居中显示，参考点画布中线
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let subtitle = that.data.info.display_tags[0]; |
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if (subtitle.length > 10) { |
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subtitle = subtitle.substr(0, 10) + '...' |
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} |
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ctx.fillText(subtitle, 25 * ratio, 540 * ratio); |
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// ctx.draw();
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// 划线价
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// ctx.setFillStyle("#999999");
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// ctx.setFontSize(32 * ratio); //字大小
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// ctx.setTextAlign('left'); //是否居中显示，参考点画布中线
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// let market_price = "￥" + (Number(that.data.info.market_price) / 100)
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// ctx.fillText(market_price, 40 * ratio + width, 620 * ratio);
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// let market_price_width = ctx.measureText(market_price).width;
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// 划线
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// ctx.beginPath()
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// ctx.setLineWidth(1)
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// ctx.moveTo(40 * ratio + width, 608 * ratio)
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// ctx.lineTo(45 * ratio + width + market_price_width, 608 * ratio)
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// ctx.stroke();
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// 长按识别二维码
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// ctx.setFillStyle("#666");
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// ctx.setFontSize(22 * ratio); //字大小
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// ctx.setTextAlign('left'); //是否居中显示，参考点画布中线
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// ctx.fillText("长按识别二维码", 404*ratio, 710*ratio);
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// 长按图片转发或保存
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// ctx.setFillStyle("#000");
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// ctx.setFontSize(24 * ratio); //字大小
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// ctx.setTextAlign('left'); //是否居中显示，参考点画布中线
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// ctx.fillText("长按图片保存到本地",(592*ratio - ctx.measureText("长按图片保存到本地").width)/2, 740*ratio);
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ctx.draw(); |
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// 转为图片
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setTimeout(() => { |
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wx.canvasToTempFilePath({ |
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x: 0, |
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y: 0, |
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canvasId: 'imageCanvas', |
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success: function (res) { |
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that.setData({ |
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shareImg: res.tempFilePath |
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}) |
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}, |
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fail(err) { |
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console.log('agdgjgdajhg', err) |
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} |
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}) |
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}, 500) |
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return false; |
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}).catch(err => { |
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console.log("this err", err) |
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}) |
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}, |
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// 圆角矩形
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handleBorderRect(ctx, x, y, w, h, r, color) { |
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ctx.beginPath(); |
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ctx.moveTo(x + w, y + h); |
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ctx.lineTo(x, y + h) |
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// 左上角
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ctx.arc(x + r, y + r, r, Math.PI, 1.5 * Math.PI); |
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ctx.moveTo(x + r, y); |
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ctx.lineTo(x + w - r, y); |
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ctx.lineTo(x + w, y + r); |
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// 右上角
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ctx.arc(x + w - r, y + r, r, 1.5 * Math.PI, 2 * Math.PI); |
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ctx.lineTo(x + w, y + h); |
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ctx.lineTo(x + w - r, y + h); |
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ctx.fillStyle = color; |
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ctx.fill(); |
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ctx.closePath(); |
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}, |
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handleBorderRect2(ctx, x, y, w, h, r, color) { |
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ctx.beginPath(); |
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ctx.moveTo(x, y); |
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ctx.lineTo(x + w, y) |
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// 右下角
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ctx.arc(x + w - r, y + h - r, r, 0, 0.5 * Math.PI); |
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ctx.lineTo(x + r, y + h); |
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ctx.lineTo(x, y + h - r); |
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// 左下角
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ctx.arc(x + r, y + h - r, r, 0.5 * Math.PI, Math.PI); |
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ctx.lineTo(x, y); |
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ctx.lineTo(x, y); |
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ctx.fillStyle = color; |
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ctx.fill(); |
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ctx.closePath(); |
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}, |
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// 绘制两行文字
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drawText: function (ctx, str, x, y, canvasWidth, ratio) { |
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let row = [], temp = "", chr = str.split(""); |
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for (var a = 0; a < chr.length; a++) { |
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if (ctx.measureText(temp).width < canvasWidth) { |
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temp += chr[a]; |
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} |
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else { |
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a--; //这里添加了a-- 是为了防止字符丢失，效果图中有对比
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row.push(temp); |
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temp = ""; |
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} |
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} |
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row.push(temp); |
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//如果数组长度大于2 则截取前两个
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if (row.length > 2) { |
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var rowCut = row.slice(0, 2); |
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var rowPart = rowCut[1]; |
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var test = ""; |
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var empty = []; |
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for (var a = 0; a < rowPart.length; a++) { |
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if (ctx.measureText(test).width < canvasWidth - 30 * ratio) { |
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test += rowPart[a]; |
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} |
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else { |
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break; |
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} |
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} |
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empty.push(test); |
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var group = empty[0] + "..."//这里只显示两行，超出的用...表示
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rowCut.splice(1, 1, group); |
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row = rowCut; |
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} |
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for (var b = 0; b < row.length; b++) { |
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ctx.fillText(row[b], x, y + b * 40 * ratio, canvasWidth); |
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} |
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}, |
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/** |
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/** |
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* 生命周期函数--监听页面初次渲染完成 |
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* 生命周期函数--监听页面初次渲染完成 |
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*/ |
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*/ |
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@ -172,7 +427,17 @@ Page({ |
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* 生命周期函数--监听页面显示 |
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* 生命周期函数--监听页面显示 |
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*/ |
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*/ |
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onShow: function () { |
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onShow: function () { |
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if (!wx.getStorageSync('jstrip_token')) { |
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return; |
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} |
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if (this.data.info && this.data.info.id) { |
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this.drawImg() |
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} |
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else { |
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setTimeout(() => { |
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this.onShow() |
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}, 200) |
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} |
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}, |
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}, |
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/** |
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/** |
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xuetaotao
5 years ago