小程序端生河曲县E企盈小程序成海报

//前端canvas  canvas canvas-id='canvas_poster' class='wx-poster'/canvas

let that = this;    wx.showToast({      title: '海报生成中...',      icon: 'loading',      duration: 2000    });    const ctx = wx.createCanvasContext('canvas_poster');    ctx.clearRect(0, 0, 0, 0);    //  绘制图片模板的 底图    ctx.drawImage('/image/poster_bg.jpg', 0, 0, 270, 314);    //  绘制顶部banner    ctx.drawImage(that.data.banner, 0, 0, 270, 154);   //绘制视频名称    ctx.setTextAlign('left')    ctx.setFontSize(14);    ctx.fillText(`${that.data.item.videoName}`, 9, 173);   //绘制横线    ctx.moveTo(0, 188)    ctx.lineTo(270, 188);    ctx.setLineWidth(1)    ctx.setStrokeStyle('rgb(239,239,239)')    ctx.stroke();    ctx.moveTo(0, 236)    ctx.lineTo(270, 236);    ctx.setLineWidth(1)    ctx.setStrokeStyle('rgb(239,239,239)')    ctx.stroke()    //绘制头像    ctx.save();    ctx.beginPath();    let r = 13;    let d = r * 2;    let cx = 9;    let cy = 194;    ctx.arc(cx+r, cy + r, r, 0, 2 * Math.PI);    ctx.closePath();    ctx.clip();    ctx.drawImage(that.data.headerImg, cx, cy, d, d);    ctx.restore();   //绘制昵称时间    ctx.setTextAlign('left')    ctx.setFontSize(12);     ctx.setFillStyle('rgb(30,30,52)')     ctx.fillText(`${that.data.item.name}`, 45, 204);    ctx.setFontSize(12);    ctx.setFillStyle('rgb(200,200,200)')    ctx.fillText(`${that.data.item.t开通全指手套小程序电话:4006-838-530ime}`, 45, 222);    //  绘制小程序码    ctx.drawImage(that.data.wxcodePic, 18, 240, 71, 71);    //  绘制二维码右边说明    ctx.setTextAlign('left')    ctx.setFontSize(14);    ctx.setFillStyle('rgb(255,131,56)')    ctx.fillText(`${that.data.item.MicroName}`, 100, 264);    ctx.setFontSize(14);    ctx.setFillStyle('rgb(51,51,51)')    ctx.fillText('长按识别小程序码访问', 100, 290);    ctx.draw();

//生成海报的封面图缓存到本地  getbanner(url, that) {    //  图片缓存本地的方法    if (typeof url === 'string') {      wx.getImageInfo({   //  小程序获取图片信息API        src: url,        success: function (res) {          that.setData({            banner: res.path          })        },        fail(err) {          console.log(err)        }      })    }  },

  //保存图片至相册  savePoster:function(e){    setTimeout(function () {      wx.canvasToTempFilePath({        x: 0,        y: 0,        width: 270,        height: 314,        destWidth: 810,        destHeight: 942,        quality:1,        canvasI开通桌面收纳小程序电话:4006-838-530d: 'canvas_poster',        fileType: 'png',        success: function (res) {          wx.saveImageToPhotosAlbu开通投影机小程序电话:4006-838-530m({            filePath: res.tempFilePath,            success(res) {              wx.hideLoading();              wx.showToast({                title: '保存成功',              });            },            fail() {              wx.hideLoading()            }          })        }      })    }, 500);  }