ios - 强制图层不在选项卡栏中旋转

Question

我有一个 tabBar 应用程序。其中一个选项卡有一个 AVCaptureVideoPreviewLayer，我在其中显示了一个用于读取条形码的相机。当我旋转屏幕时，所有内容都会旋转(选项卡栏和相机图像)。我想要得到的是相机的静态图像(禁用其旋转)和旋转屏幕时旋转的选项卡栏。

这就是我将相机图层添加到 tabBar 的方法:

override func viewDidLoad() {

    super.viewDidLoad()

    view.backgroundColor = UIColor.blackColor()
    self.captureSession = AVCaptureSession()

    // This object represents a physical capture device and the properties associated with that device
    let videoCaptureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
    // Is useful for capturing the data from the input device
    let videoInput: AVCaptureDeviceInput

    do {
        videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice)
    } catch {
        self.failed();
        return
    }

    if (self.captureSession.canAddInput(videoInput)) {
        self.captureSession.addInput(videoInput)
    } else {
        self.failed();
        return;
    }

    let metadataOutput = AVCaptureMetadataOutput()

    if (self.captureSession.canAddOutput(metadataOutput)) {
        self.captureSession.addOutput(metadataOutput)

        metadataOutput.setMetadataObjectsDelegate(self, queue: dispatch_get_main_queue())
        metadataOutput.metadataObjectTypes = [AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypePDF417Code,
            AVMetadataObjectTypeUPCECode, AVMetadataObjectTypeCode39Code,
            AVMetadataObjectTypeCode39Mod43Code, AVMetadataObjectTypeCode93Code,
            AVMetadataObjectTypeCode128Code]
    } else {
        self.failed()
        return
    }

    // Adds the preview layer to display the captured data. Sets the videoGravity to AspectFill so that it covers the full screen
    self.previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession);
    self.previewLayer.frame = self.view.layer.bounds;
    self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    self.view.layer.addSublayer(self.previewLayer)
    self.captureSession.startRunning();

}

Answer 1

停止 View 而不是图层的旋转。

override func shouldAutorotate() -> Bool {
   return false
}

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
   return UIInterfaceOrientation.Portrait.rawValue
}

这应该有效。