如何解決「deviceInputWithDevice不可用」的錯誤？

Question

我「升級」，從斯威夫特我的應用程序斯威夫特2和整個後續的錯誤來了： 'deviceInputWithDevice' is unavailable: use object construction 'AVCaptureDeviceInput(device:error:)'

這裏是有問題的代碼：

let captureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo) 
    var input:AVCaptureDeviceInput 
    let error:NSError? 

    do { 
     let input = try AVCaptureDeviceInput.deviceInputWithDevice(captureDevice) as AVCaptureDeviceInput 
    } catch let error as NSError { 
     print(error) 
    } 

有人可以幫助我理解這個建議的解決方案：「使用對象結構」AVCaptureDeviceInput（device：error :)'「以及我可以如何實現它？

Answer 1

do { 
     let input = try AVCaptureDeviceInput(device: captureDevice) as AVCaptureDeviceInput 
     // moved the rest of the image capture into the do{} scope.