Swift，让我着迷于此：iOS 8.0中不推荐使用interfaceOrientation

Question

It's not a do or die, but have not had any luck with hacking this. Thanks.

  if session.canAddInput(videoDeviceInput){

    session.addInput(videoDeviceInput)

    self.videoDeviceInput = videoDeviceInput

    dispatch_async(dispatch_get_main_queue(), {

      // ERROR HERE
      let orientation: AVCaptureVideoOrientation =  AVCaptureVideoOrientation(rawValue: self.interfaceOrientation.rawValue)!

      (self.previewView.layer as! AVCaptureVideoPreviewLayer).connection.videoOrientation = orientation

    })
  }

Answer 1

Yeah, it was depecrated. You can use UIApplication.sharedApplication().statusBarOrientation instead.

let orientation: AVCaptureVideoOrientation?

switch UIApplication.sharedApplication().statusBarOrientation{
case .LandscapeLeft:
    orientation = .LandscapeLeft
case .LandscapeRight:
    orientation = .LandscapeRight
case .Portrait:
    orientation = .Portrait
case .PortraitUpsideDown:
    orientation = .PortraitUpsideDown
case .Unknown:
    orientation = nil
}

if let orientation = orientation{
    (self.previewView.layer as! AVCaptureVideoPreviewLayer).connection.videoOrientation = orientation
}