function wrapText(ctx, text, x, y, maxWidth, lineHeight) {
  // 字符分隔为数组
  const arrText = text.split('')
  let line = ''
  let lineNum = 1

  for (let n = 0; n < arrText.length; n++) {
    const testLine = line + arrText[n]
    const isNewLine = arrText[n] === '|'
    const metrics = ctx.measureText(testLine)
    const testWidth = metrics.width
    if ((testWidth > (maxWidth + 32) * this.$$scale && n > 0) || isNewLine) {
      ctx.fillText(line, x * this.$$scale - 16 * this.$$scale, y * this.$$scale)
      line = isNewLine ? '' : arrText[n]
      lineNum += 1
      y += lineHeight
    } else {
      line = testLine
    }
  }
  ctx.fillText(line, x * this.$$scale - 16 * this.$$scale, y * this.$$scale)
  return lineNum
},