this.canvas = await this.getCanvasEl('mycanvas')
        this.ctx = this.canvas.getContext('2d')
let listen = this.camera.onCameraFrame((frame) => {
            if (this.count < 10) console.log(frame)
            this.count++
            this.canvas.width = frame.width
            this.canvas.height = frame.height
            let data = new Uint8Array(frame.data);
            let clamped = new Uint8ClampedArray(data);
            for(let i =0;i<clamped.length;i+=4){
                clamped[i] = clamped[i]+100
                clamped[i+1] = clamped[i+1]+50
                clamped[i+2] = clamped[i+2]+50
                clamped[i+3] = clamped[i+3]+50
            }
            let imageData = this.canvas.createImageData(clamped, frame.width, frame.height);
            this.ctx.putImageData(imageData, 0, 0, 0, 0, frame.width, frame.height);
        })
        listen.start()

Page({
  onReady: function () {
    wx.createSelectorQuery().select("#myCanvas").fields({
      node: true,
      size: true
    }).exec((res) => {
      const canvas = res[0].node;
      this.canvas = canvas
      this.ctx = canvas.getContext("2d")
    });
    this.drawCamera()
  },
  drawCamera: function () {
    const camera = wx.createCameraContext()
    this.count = 0
    const cameraListener = camera.onCameraFrame((frame) => {
      if (this.count < 10) console.log(frame)
      this.count++
      this.canvas.width = frame.width
      this.canvas.height = frame.height
      let data = new Uint8Array(frame.data);
      let clamped = new Uint8ClampedArray(data);
      let imageData = this.canvas.createImageData(clamped, frame.width, frame.height);
      this.ctx.putImageData(imageData, 0, 0, 0, 0, frame.width, frame.height);
    })
    cameraListener.start()
  }
})

你好，你这个问题解决了吗