swift - 如何修复错误 "deviceInputWithDevice is unavailable"？

Question

我正在将我的应用程序从 Swift“升级”到 Swift 2 并遇到以下错误:'deviceInputWithDevice' 不可用:使用对象构造 'AVCaptureDeviceInput(device:error:)'

这里是有问题的代码:

    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)
    }

有人可以帮助我理解建议的解决方案:“使用对象构造‘AVCaptureDeviceInput(device:error:)’”以及如何实现它吗？

Answer 1

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