如图可以正确的绘制出矩形，但是图片始终出不来，纯小白一个，希望路过的大大指点一下

onReady: function () {
    
    const query = wx.createSelectorQuery()
    query.select('#mycanvas')
      .fields({ node: true, size: true })
      .exec((res) => {
        const canvas = res[0].node
        const ctx = canvas.getContext('2d')

        const dpr = wx.getSystemInfoSync().pixelRatio
        canvas.width = res[0].width * dpr
        canvas.height = res[0].height * dpr
        ctx.scale(dpr, dpr)

        const img = canvas.createImage()
        img.src = "../../assets/stickers/stickers1.jpg"
        ctx.drawImage(img, 0, 0, 100, 100)
        ctx.fillRect(0, 0, 100, 100)
      })

  },