第一次canvasToTempFilePath会生成图片 [图片] 第二次canvasToTempFilePath会报fail canvas is empty canvasToTempFilePath里面加上this也没用 [图片]

一直报这个错:anvasToTempFilePath: fail canvas is empty [代码]<[代码][代码]view[代码] [代码]class[代码][代码]=[代码][代码]"Canvas_box"[代码] [代码]wx:if[代码][代码]=[代码][代码]"{{canvasHidden}}"[代码][代码]>[代码][代码]  [代码][代码]<[代码][代码]canvas[代码] [代码]class[代码][代码]=[代码][代码]"Canvas"[代码] [代码]canvas-id[代码][代码]=[代码][代码]"myCanvas"[代码] [代码]/>[代码][代码]  [代码][代码]<[代码][代码]view[代码] [代码]class[代码][代码]=[代码][代码]"save"[代码] [代码]catch:tap[代码][代码]=[代码][代码]"handSaveImg"[代码][代码]>保存图片</[代码][代码]view[代码][代码]>[代码][代码]</[代码][代码]view[代码][代码]>[代码][代码]createNewImg() {[代码][代码]  [代码][代码]var[代码] [代码]that = [代码][代码]this[代码][代码]  [代码][代码]var[代码] [代码]context = wx.createCanvasContext([代码][代码]'myCanvas'[代码][代码])[代码][代码]  [代码][代码]context.setFillStyle([代码][代码]'#fff'[代码][代码])[代码][代码]  [代码][代码]context.fillRect(0, 0, 375, 667)[代码][代码]  [代码][代码]var[代码] [代码]path = [代码][代码]'/images/bannerbj.png'[代码][代码]  [代码][代码]console.log(path)[代码][代码]  [代码][代码]context.drawImage(path, 0, 0, 340, 550)[代码][代码]  [代码][代码]context.setFontSize(14)[代码][代码]  [代码][代码]context.setFillStyle([代码][代码]'#333333'[代码][代码])[代码][代码]  [代码][代码]context.setTextAlign([代码][代码]'center'[代码][代码])[代码][代码]  [代码][代码]let name = [代码][代码]this[代码][代码].data.name[代码][代码]  [代码][代码]context.fillText(name, 175, 235)[代码][代码]  [代码][代码]context.stroke()[代码] [代码]  [代码][代码]context.setFontSize(50)[代码][代码]  [代码][代码]context.setFillStyle([代码][代码]'#333333'[代码][代码])[代码][代码]  [代码][代码]context.setTextAlign([代码][代码]'center'[代码][代码])[代码][代码]  [代码][代码]let score = [代码][代码]this[代码][代码].data.score[代码][代码]  [代码][代码]context.fillText(score, 162, 180)[代码][代码]  [代码][代码]context.stroke()[代码][代码]  [代码][代码]// context.draw(false, this.saveCanvasToFile())[代码][代码]  [代码][代码]context.draw([代码][代码]false[代码][代码], e => {[代码][代码]    [代码][代码]wx.canvasToTempFilePath([代码][代码]      [代码][代码]{[代码][代码]        [代码][代码]canvasId: [代码][代码]'myCanvas'[代码][代码],[代码][代码]        [代码][代码]quality: 1,[代码][代码]        [代码][代码]success: res => {[代码][代码]          [代码][代码]this[代码][代码].setData({[代码][代码]            [代码][代码]canvasTemImg: res.tempFilePath,[代码][代码]            [代码][代码]canvasHidden: [代码][代码]true[代码][代码]          [代码][代码]})[代码][代码]        [代码][代码]},[代码][代码]        [代码][代码]fail: res => {[代码][代码]          [代码][代码]console.log(res)[代码][代码]        [代码][代码]}[代码][代码]      [代码][代码]},[代码][代码]      [代码][代码]this[代码][代码]    [代码][代码])[代码][代码]  [代码][代码]})[代码][代码]},[代码][代码]saveCanvasToFile() {[代码][代码]  [代码][代码]let that = [代码][代码]this[代码][代码]  [代码][代码]setTimeout(() => {[代码][代码]    [代码][代码]console.log([代码][代码]'123123123'[代码][代码])[代码] [代码]    [代码][代码]wx.canvasToTempFilePath([代码][代码]      [代码][代码]{[代码][代码]        [代码][代码]canvasId: [代码][代码]'myCanvas'[代码][代码],[代码][代码]        [代码][代码]quality: 1,[代码][代码]        [代码][代码]success: res => {[代码][代码]          [代码][代码]this[代码][代码].setData({[代码][代码]            [代码][代码]canvasTemImg: res.tempFilePath,[代码][代码]            [代码][代码]canvasHidden: [代码][代码]true[代码][代码]          [代码][代码]})[代码][代码]        [代码][代码]},[代码][代码]        [代码][代码]fail: res => {[代码][代码]          [代码][代码]console.log(res)[代码][代码]        [代码][代码]}[代码][代码]      [代码][代码]},[代码][代码]      [代码][代码]this[代码][代码]    [代码][代码])[代码][代码]  [代码][代码]}, 2000)[代码][代码]},[代码]

- 当前 Bug 的表现（可附上截图）    textarea输入文字之后，文字不随视图滚动，这也导致不能获取到焦点（这个BUG已经很久了，懒得上图） - 预期表现    textarea应该随着视图滚动    有用户群体确实了不起，有恃无恐，BUG迟迟不解决

[图片]