帮我写一段微信小程序裁剪图片的裁剪器代码

好的，以下是微信小程序裁剪图片的裁剪器代码：

Page({
  data: {
    src: '', // 图片路径
    width: , // 图片宽度
    height: , // 图片高度
    cropperWidth: , // 裁剪框宽度
    cropperHeight: , // 裁剪框高度
    cropperLeft: , // 裁剪框左边距
    cropperTop: , // 裁剪框上边距
    scale: 1, // 图片缩放比例
    angle: , // 图片旋转角度
    cropperData: {}, // 裁剪框数据
    showCropper: false, // 是否显示裁剪框
    showPreview: false, // 是否显示预览图
    previewImage: '', // 预览图路径
  },

  // 选择图片
  chooseImage() {
    wx.chooseImage({
      success: (res) => {
        const tempFilePaths = res.tempFilePaths
        this.setData({
          src: tempFilePaths[],
        })
        this.getImageInfo()
      },
    })
  },

  // 获取图片信息
  getImageInfo() {
    wx.getImageInfo({
      src: this.data.src,
      success: (res) => {
        const { width, height } = res
        const cropperWidth = width > height ? height : width
        const cropperHeight = cropperWidth
        const cropperLeft = (width - cropperWidth) / 2
        const cropperTop = (height - cropperHeight) / 2
        this.setData({
          width,
          height,
          cropperWidth,
          cropperHeight,
          cropperLeft,
          cropperTop,
          showCropper: true,
        })
      },
    })
  },

  // 裁剪框数据变化
  cropperChange(e) {
    this.setData({
      cropperData: e.detail,
    })
  },

  // 点击取消
  cancel() {
    this.setData({
      showCropper: false,
      showPreview: false,
    })
  },

  // 点击确定
  confirm() {
    wx.showLoading({
      title: '正在生成图片...',
    })
    const { cropperData, src, width, height, angle } = this.data
    const canvasWidth = cropperData.width
    const canvasHeight = cropperData.height
    const canvasLeft = cropperData.left - this.data.cropperLeft
    const canvasTop = cropperData.top - this.data.cropperTop
    const canvasId = 'cropperCanvas'
    const ctx = wx.createCanvasContext(canvasId, this)
    ctx.clearRect(, , canvasWidth, canvasHeight)
    ctx.save()
    ctx.translate(canvasWidth / 2, canvasHeight / 2)
    ctx.rotate((angle * Math.PI) / 180)
    ctx.drawImage(src, -width / 2 + canvasLeft, -height / 2 + canvasTop, width, height)
    ctx.restore()
    ctx.draw(false, () => {
      wx.canvasToTempFilePath({
        canvasId,
        success: (res) => {
          wx.hideLoading()
          this.setData({
            showCropper: false,
            showPreview: true,
            previewImage: res.tempFilePath,
          })
        },
      }, this)
    })
  },

  // 点击旋转
  rotate() {
    const angle = this.data.angle + 90
    this.setData({
      angle,
    })
  },

  // 点击缩小
  zoomOut() {
    const scale = this.data.scale - .1
    this.setData({
      scale,
    })
  },

  // 点击放大
  zoomIn() {
    const scale = this.data.scale + .1
    this.setData({
      scale,
    })
  },
})

希望这段代码能够帮到你！