我收到上述错误,并试图通过在do/catch块中添加来修改此错误。出于某种原因,错误不会消失。有谁知道这可能是为什么?错误:'调用可能抛出但未标记尝试错误未处理'
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应该像catch(NSException * ex){ –