相机仅以纵向模式快速拍照

1 回答

• 0

  可能的解决方案：将图像保存为JPEG而不是PNG

  这是因为PNG不存储方向信息 . 将照片另存为JPG，它将正确定位 .

  使用此代码在拍摄图像后立即将图像转换为JPG（第二行是此处的操作一行）：

  let image = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
  let imageData:NSData = UIImageJPEGRepresentation(image, 0.9)! // 0.9 is compression value: 0.0 is most compressed/lowest quality and 1.0 is least compressed/highest quality
  

  来源更多信息：https://stackoverflow.com/a/34796890/5700898

  ---

  如果这不起作用

  I've edited your code in a couple places, see if the below code now works as you hope:

  // initialize saving photo capabilities
  func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
          if error == nil {
              print("image saved")
          } else {
              print("save error: \(error?.localizedDescription)")
          }
  }
  
  // take a photo
  @IBAction func takePhoto(sender: AnyObject) {
  self.fullScreenView.hidden = false
  self.recordButton.enabled = false
  self.takephoto.enabled = false
  self.recordButton.hidden = true
  self.takephoto.hidden = true
  
  session.startRunning()
  
  // customize the quality level or bitrate of the output photo
  session.sessionPreset = AVCaptureSessionPresetPhoto
  
  // add the AVCaptureVideoPreviewLayer to the view and set the view in fullscreen
  fullScreenView.frame = view.bounds
  videoPreviewLayer.frame = fullScreenView.bounds
  fullScreenView.layer.addSublayer(videoPreviewLayer)
  
  // add action to fullScreenView
  gestureFullScreenView = UITapGestureRecognizer(target: self, action: #selector(ViewController.takePhoto(_:)))
  self.fullScreenView.addGestureRecognizer(gestureFullScreenView)
  
  // add action to myView
  gestureView = UITapGestureRecognizer(target: self, action: #selector(ViewController.setFrontpage(_:)))
  self.view.addGestureRecognizer(gestureView)
  
  if (preview == true) {
      if let videoConnection = stillImageOutput!.connectionWithMediaType(AVMediaTypeVideo) {
          // code for photo capture goes here...
  
          stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: { (sampleBuffer, error) -> Void in
              // process the image data (sampleBuffer) here to get an image file we can put in our view
  
              if (sampleBuffer != nil) {
                  self.stillImageOutput!.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]
          if let videoConnection = self.stillImageOutput!.connectionWithMediaType(AVMediaTypeVideo){
              videoConnection.videoOrientation = self.interfaceToVideoOrientation()
              self.stillImageOutput!.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {
                  (sampleBuffer, error) in
                  let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
                  let image = UIImage(data: imageData)
  
                  self.fullScreenView.hidden = true
                  self.fullScreenView.gestureRecognizers?.forEach(self.fullScreenView.removeGestureRecognizer)
                  self.session.stopRunning()
  
                  // save image to the library
                  UIImageWriteToSavedPhotosAlbum(image, self, #selector(ViewController.image(_:didFinishSavingWithError:contextInfo:)), nil)
  
                  self.imageViewBackground = UIImageView(frame: self.view.bounds)
                  self.imageViewBackground.image = image
                  self.imageViewBackground.tag = self.key
  
                  self.view.addSubview(self.imageViewBackground)
              }
          })
      }
  }
  else {
      preview = true
  }
  }
  

  回复于 2024-05-06T20:31:05+08:00