AVCaptureMetadataOutputObjectsDelegate：用來捕捉並輸出數據的方法

1. 在自己的專案裡 extension AVCaptureMetadataOutputObjectsDelegate

   

2. 設定 AVCaptureSession

   • 實例化一個 AVCaptureSession 物件

     captureSession = AVCaptureSession()

   • 透過 AVCaptureDevice 來捕捉相機及其相關屬性

     uard let videoCaptureDevice = AVCaptureDevice.default(for: .video) else { return }
     
     let videoInput:AVCaptureDeviceInput
     
     do {
         videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice)
     } catch {
         print(error)
         return
     }
     ``
     
     

   • 判斷是否可以將 videoInput 加入到 captureSession

     f (captureSession?.canAddInput(videoInput) ?? false) {
         captureSession?.addInput(videoInput)
     } else {
         return
     }
     ``
     
     

明天將會繼續介紹 AVCaptureMetadataOutputObjectsDelegate 裡的設定

GitHub - AVCaptureVideoPreviewLayerDemo