LowLagPhotoCapture.FinishAsync Metode
Definisi
Penting
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Secara asinkron merilis objek dan sumber daya LowLagPhotoCapture yang digunakan oleh operasi pengambilan foto.
public:
virtual IAsyncAction ^ FinishAsync() = FinishAsync;
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncAction FinishAsync();
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncAction FinishAsync();
function finishAsync()
Public Function FinishAsync () As IAsyncAction
Mengembalikan
Objek yang digunakan untuk mengontrol operasi asinkron.
- Atribut
Contoh
Berikut adalah contoh yang menunjukkan cara mengatur dan mengambil foto jeda rendah. Ini menampilkan foto dan gambar mini yang diambil dalam objek Gambar . XAML membuat UI sederhana dengan dua objek Gambar dan beberapa objek Tombol untuk berinteraksi dengan elemen MediaCapture . Dalam kode, ada metode untuk menginisialisasi objek MediaCapture , metode untuk menginisialisasi objek LowLagPhotoCapture , metode untuk mengambil foto dan menampilkannya, dan metode untuk mematikan LowLagPhotoCapture.
<StackPanel Orientation="Horizontal">
<Image x:Name="imageLowLagPhoto" Stretch="None"
Width="320" Height="240" />
<Image x:Name="imageLowLagThumbnail" Stretch="None"
Width="320" Height="240" />
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button Click="InitMediaCapture_Click" Content="Initialize Camera" />
<Button Click="InitLowLagPhotoCapture_Click" Content="Initialize Low Lag Photo Capture"/>
<Button Click="CaptureLagPhotoCapture_Click" Content="Capture Low Lag Photo"/>
<Button Click="CloseLagPhotoCapture_Click" Content="Finish low Lag Capture"/>
</StackPanel>
LowLagPhotoCapture lowLagCaptureMgr = null;
MediaCapture mediaCaptureManager;
async private void InitMediaCapture_Click(object sender, RoutedEventArgs e)
{
mediaCaptureManager = new MediaCapture();
await mediaCaptureManager.InitializeAsync();
}
async private void InitLowLagPhotoCapture_Click(object sender, RoutedEventArgs e)
{
// Enable thumbnail images
mediaCaptureManager.VideoDeviceController.LowLagPhoto.ThumbnailEnabled = true;
mediaCaptureManager.VideoDeviceController.LowLagPhoto.ThumbnailFormat = MediaThumbnailFormat.Bmp;
mediaCaptureManager.VideoDeviceController.LowLagPhoto.DesiredThumbnailSize = 25;
// Image properties
ImageEncodingProperties imgFormat = ImageEncodingProperties.CreateJpeg();
// Create LowLagPhotoCapture object
lowLagCaptureMgr = await mediaCaptureManager.PrepareLowLagPhotoCaptureAsync(imgFormat);
}
async private void CaptureLagPhotoCapture_Click(object sender, RoutedEventArgs e)
{
// Take photo
CapturedPhoto photo = await lowLagCaptureMgr.CaptureAsync();
// Get photo as a BitmapImage
BitmapImage bitmap = new BitmapImage();
await bitmap.SetSourceAsync(photo.Frame);
// Get thumbnail as a BitmapImage
BitmapImage bitmapThumbnail = new BitmapImage();
await bitmapThumbnail.SetSourceAsync(photo.Thumbnail);
// imageLowLagPhoto is a <Image> object defined in XAML
imageLowLagPhoto.Source = bitmap;
// imageLowLagThumbnail is a <Image> object defined in XAML
imageLowLagThumbnail.Source = bitmapThumbnail;
}
async private void CloseLagPhotoCapture_Click(object sender, RoutedEventArgs e)
{
// Release the LowLagPhotoCapture object and resources
await lowLagCaptureMgr.FinishAsync();
}