斯威夫特3 AVCaptureSession图像输出是在纵向而非横向

问题描述：

我做了一个简单的iOS应用程序，所拍摄照片并将其保存到该设备的图书馆。我期待风景图像输出，但什么是相机生产是一个风景图像的纵向，说一个50×，图像旋转到90度。我希望图像处于风景中，我不确定我的代码有什么问题。斯威夫特3 AVCaptureSession图像输出是在纵向而非横向

我需要我的预览层是在景观，所以我把我的AVCaptureVideoOrientation到所需方向。

previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.landscapeRight

下面是配置：

override func viewWillAppear(_ animated: Bool) { 

    let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo) 
    for device in devices! { 
     if (device as AnyObject).position == AVCaptureDevicePosition.back { 

      do { 

       let input = try AVCaptureDeviceInput(device: device as! AVCaptureDevice) 

       if (captureSession.canAddInput(input)) { 

        captureSession.sessionPreset = AVCaptureSessionPresetPhoto 
        captureSession.addInput(input) 
        sessionOutput.outputSettings = [AVVideoCodecKey : AVVideoCodecJPEG] 


        if (captureSession.canAddOutput(sessionOutput)) { 

         captureSession.addOutput(sessionOutput) 
         captureSession.startRunning() 

         previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) 
         previewLayer.videoGravity = AVLayerVideoGravityResize 
         previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.landscapeRight 
         previewLayer.frame = self.cameraView.bounds 
         cameraView.layer.addSublayer(previewLayer) 

         previewLayer.position = CGPoint(x: self.cameraView.frame.width/2, y: self.cameraView.frame.height/2) 
         previewLayer.bounds = cameraView.frame 

         cameraView.addSubview(captureBtn) 
         cameraView.addSubview(shutterTimer) 

        } 

       } 

      } catch let err { 

       print(err) 
       return 

      } 

     } 
    } 

}

图像输出

if let videoConnection = sessionOutput.connection(withMediaType: AVMediaTypeVideo) { 

     sessionOutput.captureStillImageAsynchronously(from: videoConnection, completionHandler: { (buffer, error) in 

      let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(buffer) 
      let image = UIImage(data: imageData!)! 
      UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) 
      print(UIImage(data: imageData!)!) 

     }) 

    }

答

我知道了！所以，如果你的图像保存到库中，你必须设置输出的方向

videoConnection.videoOrientation = .landscapeRight

：通过简单地加入这一行根据您预览层上有什么0

....

if let videoConnection = sessionOutput.connection(withMediaType: AVMediaTypeVideo) { 
     // set output orientation before saving 
     videoConnection.videoOrientation = .landscapeRight 
     sessionOutput.captureStillImageAsynchronously(from: videoConnection, completionHandler: { (buffer, error) in 

      let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(buffer) 
      let image = UIImage(data: imageData!)! 
      UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)     
     }) 

    }

斯威夫特3 AVCaptureSession图像输出是在纵向而非横向

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