[图片] - 预期表现 [图片] - 复现路径 // **分享到朋友圈  sharefriend: function (){    var that = this;    wx.getSystemInfo({      success:res =>{        console.log('小程序信息', parseFloat(res.version));        if (parseFloat(res.version) < 6.6){          wx.showModal({            title: '提示',            content: '当前微信版本过低，无法使用该功能，请升级到最新微信版本后重试。'          })          return false;        }else{          that.setData({            share2: true,            share: false          });          wx.showLoading({            title: '正在生成图片...',            mask: true,          });        }      }    });    // 小程序获取图片信息API    wx.getImageInfo({      src: that.data.ctxUrl,      success: function (res) {      console.log(res);        that.setData({          ctxUrl: res.path        })      },      fail(err) {        console.log(err)      }    })        setTimeout(()=>{      var canvasCtx = wx.createCanvasContext('myCanvas');      canvasCtx.clearRect(0, 0, 0, 0);      //绘制背景      canvasCtx.drawImage('../../img/write.png', 0, 0, that.data.windowWidth * 0.8, that.data.windowHeight * 0.8);      //绘制名称      canvasCtx.setFontSize(18);      canvasCtx.setTextAlign('center');      canvasCtx.fillText(that.data.ctxName, that.data.windowWidth * 0.8 / 2, 120);      // 绘制信息      canvasCtx.setFontSize(18);      canvasCtx.setTextAlign('center');      canvasCtx.fillText(that.data.ctxRank, that.data.windowWidth * 0.8 / 6, 180);      canvasCtx.fillText(that.data.ctxNum, that.data.windowWidth * 0.8 / 2, 180);      canvasCtx.fillText(that.data.ctxPoints, (that.data.windowWidth * 4) / 6, 180);      // 绘制信息2      canvasCtx.setFontSize(13);      canvasCtx.setTextAlign('center');      canvasCtx.fillText('当前排名', that.data.windowWidth * 0.8 / 6, 200);      canvasCtx.fillText('得分', that.data.windowWidth * 0.8 / 2, 200);      canvasCtx.fillText('净胜分', (that.data.windowWidth * 4) / 6, 200);      // 绘制分割线      canvasCtx.drawImage('../../img/line.png', 0, 240, that.data.windowWidth * 0.8, 15);            // 比赛项目：羽神等你来战！丰厚礼品等着你      canvasCtx.setFontSize(12);      canvasCtx.setTextAlign('center');      canvasCtx.fillText('比赛项目：羽神等你来战！丰厚礼品等着你', that.data.windowWidth * 0.8 / 2.1, 285);      // 绘制二维码      canvasCtx.drawImage('../../img/code.jpg', (that.data.windowWidth * 0.8 / 2) - 50, that.data.windowHeight * 0.585, 100, 100);      //绘制头像      canvasCtx.save();      canvasCtx.beginPath(); //开始绘制      canvasCtx.arc(that.data.windowWidth * 0.8 / 2, 58, 38, 0, 2 * Math.PI, false);      canvasCtx.clip();      canvasCtx.drawImage(that.data.ctxUrl, that.data.windowWidth * 0.8 / 2 - 38, 20, 76, 76);      canvasCtx.restore();        canvasCtx.draw();      wx.hideLoading();    }, 1000)  },  // 保存绘制的图片  savePic: function () {    var that = this;    wx.canvasToTempFilePath({      x: 0,      y: 0,      width: that.data.windowWidth,      height: that.data.windowHeight,      destWidth: that.data.windowWidth,      destHeight: that.data.windowHeight,      canvasId: 'myCanvas',      success: function (res) {        if (!res.tempFilePath) {          wx.showModal({            title: '提示',            content: '图片绘制中，请稍后重试',            showCancel: false          })        }        util.savePicToAlbum(that,res.tempFilePath);      }    })  },  // 关闭绘制  closeShare:function(){    this.setData({      share: true,      share2: false    })  }

onShareAppMessage: function() {     wx.showShareMenu({     withShareTicket: true,     });     return; } 设置失效，进入也无法获取 shareticketL:undefined，sence也是1008，之前还有用，是wx突然出问题了吗？又没遇见过的老哥

大神们好，想canvas画图作为onShareAppMessage的imageUrl，但是为啥我的显示不出来呢？帮看看啥问题吧，非常感谢 //调用cropImg这个函数由imgSrc图片生成一个新的图片保存在headShare 全局变量中 cropImg: function(imgSrc) {     wx.getImageInfo({         src: imgSrc,         success: function(ret) {             var orWidth = ret.width             var orHeight = ret.height             ctx.drawImage(imgSrc, 0, orHeight * 1 / 10, orWidth, orHeight * 8 / 10, 0, 0, 500, 400);             ctx.draw(false, function() {             wx.canvasToTempFilePath({                 canvasId: 'attendCanvasId',                 fileType: 'jpg',                 success: function(resl) {                     wx.saveFile({//把文件保存到本地                         tempFilePath: resl.tempFilePath,                         success: function(res) {                                 headShare = res.savedFilePath                                 console.log(headShare)                             }                         })                     }                 }) //wx.canvasToTempFilePath end             }) //ctx.draw end         }     }) }, //调用onShareAppMessage之前已经生成图片文件并保存到headShare变量中 onShareAppMessage: function(res) {     console.log(headShare)//可以打印出图片本地路径     return {         title: xitieInfo.title,         path: '/pages/showxitie/showxitie',         imageUrl: headShare,         success: function(res) {             console.log('成功', res)         },         fail: function(res) {                // 转发失败              console.log('失败', res)         }     } },

{title: "1231321", path: "/pages/index/index?id=1", imageUrl: "http://tmp/wx72a406d3a4de4821.o6zAJs9nSTp8WpYG1y2T….xGufqdOAW0Lpf86dd1758aa0717e6fae39cd52753c9a.png"} 这种图片路径在onShareAppMessage中return是白色图  该图片在工具canvas中能正常显示，在iPhone的canvas中一片白，所以导致分享的图也是一片白