我收到上述錯誤,並試圖通過在do/catch塊中添加來修改此錯誤。出於某種原因,錯誤不會消失。有誰知道這可能是爲什麼?錯誤:'調用可能拋出但未標記嘗試錯誤未處理'
override func viewDidAppear(animated: Bool) {
super.viewWillAppear(animated)
captureSession = AVCaptureSession()
captureSession?.sessionPreset = AVCaptureSessionPreset1920x1080
let backCamera = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
do {
let input = AVCaptureDeviceInput(device: backCamera)
captureSession?.addInput(input)
stillImageOutput = AVCaptureStillImageOutput()
stillImageOutput?.outputSettings = [AVVideoCodecKey : AVVideoCodecJPEG]
if (captureSession?.canAddOutput(stillImageOutput) != nil){
captureSession?.addOutput(stillImageOutput)
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
previewLayer?.videoGravity = AVLayerVideoGravityResizeAspect
previewLayer?.connection.videoOrientation = AVCaptureVideoOrientation.Portrait
oview.layer.addSublayer(previewLayer!)
captureSession?.startRunning()
}
} catch {
}
}
而不是做catch使用try catch和catch應該像catch(NSException * ex){ –