ios - 迁移到 Swift 4 后，是否已停止调用 AVCaptureOutput 函数？

Question

迁移 Swift 4 后，已停止调用以下函数。我找不到原因。

  func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, from connection: AVCaptureConnection!) {

        Code

 }

Answer 1

通过开始编写功能使 Xcode 9 提出建议后

      func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {

   code

}

建议，我更换

            func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, from connection: AVCaptureConnection!) {

和

           func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {

现在，它已被调用。