我试图将AVCaptureVideoPreviewLayer作为UIView元素中的子层。我尝试使用以下方法将其框架设置为UIView边界:
cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
cameraPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
cameraPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
cameraPreviewLayer?.frame = PreviewController.bounds
PreviewController.layer.addSublayer(cameraPreviewLayer!)
当我尝试打印框架的值和边界时,它给出以下信息:
print(PreviewController.bounds)
print(cameraPreviewLayer!.frame)
(0.0, 0.0, 375.0, 500.0)
(0.0, 0.0, 375.0, 500.0)
在实际的应用程序中,它导致子层无法填充整个UIView元素:
有谁知道如何解决这个问题?
最佳答案
你需要
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
cameraPreviewLayer?.frame = PreviewController.bounds
}