textProcess: function(canvas, text, width, line) {

    let chr = text.split('')

    let temp = ''

    let rowArray = []

​

    for (let i = 0; i < chr.length; i++) {

      if (canvas.measureText(temp).width + canvas.measureText(chr[i].toString()).width < width) {

        temp += chr[i]

      } else {

        i-- //这里添加了a-- 是为了防止字符丢失，效果图中有对比

        rowArray.push(temp)

        temp = ""

      }

    }

    rowArray.push(temp)

​

    if (rowArray.length > line) {

      let arrayPart = rowArray.slice(0, line)

      let row = arrayPart[line - 1]

      let tempString = ''

      let tempRow = []

      for (let i = 0; i < row.length; i++) {

        if (canvas.measureText(tempString).width + canvas.measureText(chr[i].toString()).width + canvas.measureText('...').width < width) {

          tempString += row[i]

        } else {

          break

        }

      }

      tempRow.push(tempString)

      let group = tempRow[0] + '...'

      arrayPart.splice(line - 1, 1, group)

      rowArray = arrayPart

    }

​

    return rowArray

  },