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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: {
 -     shareDefaultTp: imgurl.shareDefaultTp.url,
 -     navigationBarHeight,
 -     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
 -   },
 - 
 -   /**
 -    * 生命周期函数--监听页面加载
 -    */
 -   onLoad: function(options) {
 -     this.setCanvas()
 -   },
 -   onShow: function() {
 - 
 -   },
 - 
 -   //绘制微信头像
 -   drawAvatarimg(ctx, scale) {
 -     var that = this;
 -     //商户详情海报
 -     console.log(that.data.avatarUrl, "???")
 -     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, 18, 35, 35);
 -       }
 -     });
 -   },
 - 
 - 
 -   setCanvas() {
 -     wx.showLoading({
 -       title: "生成中..."
 -     });
 -     var tha
 -     // 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");
 -     this.getQrcodeFx(ctx, scale)
 -     this.getMallInfo(ctx, scale)
 -     this.getUserInfo(ctx, scale)
 -     ctx.setFillStyle("#fff");
 -     ctx.fillRect(0, 0, this.data.windowWidth, this.data.windowHeight);
 -    
 -     this.drawNormalText(ctx, "长按二维码识别", 180 * scale, 360 * scale, 16 * scale, "#000", "left", "middle")
 -     this.drawNormalText(ctx, "尽享更多优惠活动!", 170 * scale, 390 * scale, 16 * scale, "#000", "left", "middle")
 -     ctx.draw(true);
 -     this.setData({
 -       isdisable: false,
 -     })
 -     setTimeout(function() {
 -       wx.hideLoading()
 -     }, 2000)
 -   },
 - 
 -   // 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);
 -     ctx.draw(true);
 -   },
 - 
 -   //商场信息
 -   getMallInfo: function(ctx, scale) {
 -     let that = this;
 -     // 获取用户信息
 -     Http.get({
 -       url: config.api.getMallInfo,
 -       data: {}
 -     }).then(res => {
 -       console.log(res);
 -       let src1 = ""
 -       if (res.data.img) {
 -         src1 = res.data.img + `?imageView/2/w/${100}/h/${100}`;
 -       } else {
 -         src1 = that.data.shareDefaultTp + `?imageView/2/w/${100}/h/${100}`; //默认图片地址
 -       }
 -       let src2 = util.getProxyImgUrl(src1);
 -       wx.getImageInfo({
 -         src: src2,
 -         success: function(res) {
 -           ctx.drawImage(res.path, ((that.data.windowWidth -320 )/4 )* scale, 80 * scale, 320 * scale, 200 * scale);
 -           ctx.draw(true);
 -         }
 -       });
 -       that.setData({
 -         mallname: res.data.name
 -       });
 -       if (res.data.addr){
 -         that.canvasTextAutoLine('详细地址:' + res.data.addr, ctx, 20 * scale, 480 * scale, 14 * scale, "#888", "left", "middle", 26 * scale, 330 * scale, 2)
 -       }
 -       if (res.data.servicePhone){
 -         that.drawNormalText(ctx, '客服电话:' + res.data.servicePhone, 20 * scale, 540 * scale, 16 * scale, "#888", "left", "middle", scale);
 -       }
 -       
 -       that.drawNormalText(ctx, "---" + that.data.mallname + "---", 90 * scale, 62 * scale, 16 * scale, "#000", "left", "middle", scale);
 -     });
 -   },
 - 
 - 
 - 
 - 
 -   //获取分享小程序二维码
 -   getQrcodeFx(ctx, scale) {
 -     let that = this
 -     let coImageWidth = parseInt(120 * scale);
 -     let coImageHeight = parseInt(120 * scale);
 -     Http.get({
 -       url: config.api.getQrcodeFx,
 -     }).then(res => {
 -       console.log(res.data)
 -       let src1 = res.data + `?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, 30 * scale, 310 * scale, coImageWidth, coImageHeight, scale);
 -         }
 -       });
 -     })
 -   },
 - 
 -   //获取头像和昵称
 -   getUserInfo: function(ctx, scale) {
 -     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, //用户名
 -               avatarUrl: data.userInfo.avatarUrl //用户头像
 -             });
 -             console.log(data.userInfo.avatarUrl, "????--**")
 -             this.drawNormalText(ctx, nickName, 50 * scale, 34 * scale, 16 * scale, "#000", "left", "middle");
 -             this.drawNormalText(ctx, " 向您推荐", (ctx.measureText(this.data.nickName).width + 60) * scale * scale, 32 * scale, 16 * scale, "#848484", "left", "middle", scale);
 -             that.drawAvatarimg(ctx, scale)
 -           }
 -         })
 -       } else {
 -         nickName = res.data.nickName;
 -         that.setData({
 -           nickName: nickName,
 -           avatarUrl: res.data.avatarUrl
 -         });
 -         this.drawNormalText(ctx, nickName, 48 * scale, 34 * scale, 16 * scale, "#000", "left", "middle");
 -         this.drawNormalText(ctx, " 向您推荐", (ctx.measureText(this.data.nickName).width + 60) * scale * scale, 32 * scale, 16 * scale, "#848484", "left", "middle", scale);
 -         that.drawAvatarimg(ctx, scale)
 -       }
 -     });
 -   },
 - 
 -   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);
 -   },
 - 
 - 
 -   /**
 -    * 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
 -         });
 -       }
 -     });
 -   },
 -   //保存到相册
 -   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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