onShow: function () { var that = this; //1. 请求后端API生成小程序码 that.getQr(); //2. canvas绘制文字和图片 const ctx = wx.createCanvasContext('myCanvas'); var imgPath = '../../../image/intro.png' var bgImgPath = '../../../image/bgImgPath.png'; ctx.drawImage(imgPath, 0, 0, 600, 520); ctx.setFillStyle('white') ctx.fillRect(0, 520, 600, 280); ctx.drawImage(imgPath, 30, 550, 60, 60); ctx.drawImage(bgImgPath, 30, 550, 60, 60); ctx.drawImage(imgPath, 410, 610, 160, 160); ctx.setFontSize(28) ctx.setFillStyle('#6F6F6F') ctx.fillText('妖妖灵', 110, 590) ctx.setFontSize(30) ctx.setFillStyle('#111111') ctx.fillText('宠友们快来围观萌宠靓照', 30, 660) ctx.fillText('我在萌爪幼稚园', 30, 700) ctx.setFontSize(24) ctx.fillText('长按扫码查看详情', 30, 770) ctx.draw() }, // 3. canvas画布转成图片 wx.canvasToTempFilePath({ x: 0, y: 0, width: 600, height: 800, destWidth: 600, destHeight:800, canvasId: 'myCanvas', success: function(res) { console.log(res.tempFilePath); that.setData({ shareImgSrc : res.tempFilePath }) }, fail:function (res) { console.log(res) } }) //4. 当用户点击分享到朋友圈时，将图片保存到相册 wx.saveImageToPhotosAlbum({ filePath:that.data.shareImgSrc, success(res) { wx.showModal({ title: '存图成功', content: '图片成功保存到相册了，去发圈噻~', showCancel:false, confirmText:'好哒', confirmColor:'#72B9C3', success: function(res) { if (res.confirm) { console.log('用户点击确定'); } that.hideShareImg() } }) }}) 
