我在带有 ViewController 的 Storyboard中有一个自定义 View ，用于显示 AVCaptureSessionPreviewLayer 的输出(在本例中为网络摄像头镜头)。在我的普通窗口中使用自定义 View 时，一切正常，我可以看到视频输出。
但是当我想在工作表对话框中使用自定义 View 时，视频不可见，即使网络摄像头指示正在运行。
这是 ViewController 代码:
import Cocoa
import AVKit
class RecordViewController: NSViewController {
let captureSession = AVCaptureSession()
var captureDevice : AVCaptureDevice?
var previewLayer : AVCaptureVideoPreviewLayer?
@IBOutlet weak var camera: NSView!
override func viewDidLoad() {
super.viewDidLoad()
camera.wantsLayer = true;
camera.layer = CALayer()
// Do any additional setup after loading the view, typically from a nib.
captureSession.sessionPreset = AVCaptureSession.Preset.medium
// Get all audio and video devices on this machine
let devices = AVCaptureDevice.devices()
// Find the FaceTime HD camera object
for device in devices {
print(device)
// Camera object found and assign it to captureDevice
if ((device as AnyObject).hasMediaType(AVMediaType.video)) {
print(device)
captureDevice = device as? AVCaptureDevice
}
}
if captureDevice != nil {
do {
try captureSession.addInput(AVCaptureDeviceInput(device: captureDevice!))
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
previewLayer?.frame = (self.camera.layer?.frame)!
// Add previewLayer into custom view
self.camera.layer?.addSublayer(previewLayer!)
// Start camera
captureSession.startRunning()
} catch {
print(AVCaptureSessionErrorKey.description)
}
} }
}
最佳答案
更改行:
previewLayer?.frame = (self.camera.layer?.frame)!
到:
previewLayer?.frame = self.camera.bounds
如果你想让你的相机填满你的 customView，也可以使用这一行:
previewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
关于swift - 使用工作表对话框时 AVCaptureSession 不可见，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57769277/