/// <summary>
/// Gets the media asynchronous.
/// </summary>
/// <param name="sourceType">Type of the source.</param>
/// <param name="mediaType">Type of the media.</param>
/// <param name="options">The options.</param>
/// <returns>Task representing the asynchronous operation.</returns>
private Task <MediaFile> GetMediaAsync(
UIImagePickerControllerSourceType sourceType,
string mediaType,
CameraMediaStorageOptions options = null)
{
// Get the active window
var window = UIApplication.SharedApplication.KeyWindow;
if (window == null)
{
throw new InvalidOperationException("There's no current active window");
}
// Get the view controller
var viewController = window.RootViewController;
#if __IOS_10__
if (viewController == null || (viewController.PresentedViewController != null && viewController.PresentedViewController.GetType() == typeof(UIAlertController)))
{
window =
UIApplication.SharedApplication.Windows.OrderByDescending(w => w.WindowLevel)
.FirstOrDefault(w => w.RootViewController != null);
if (window == null)
{
throw new InvalidOperationException("Could not find current view controller");
}
viewController = window.RootViewController;
}
#endif
// Get the root view controller
while (viewController.PresentedViewController != null)
{
viewController = viewController.PresentedViewController;
}
// Create a new media picker delegate
var newDelegate = new MediaPickerDelegate(viewController, sourceType, options);
var operationResult = Interlocked.CompareExchange(ref this.pickerDelegate, newDelegate, null);
if (operationResult != null)
{
throw new InvalidOperationException("Only one operation can be active at at time");
}
// Setup the view controller
var picker = MediaPickerIOS.SetupController(newDelegate, sourceType, mediaType, options);
// If the image is from photo library
if ((UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad) &&
(sourceType == UIImagePickerControllerSourceType.PhotoLibrary))
{
// Create a photo choosing popover
newDelegate.Popover = new UIPopoverController(picker)
{
Delegate = new MediaPickerPopoverDelegate(newDelegate, picker)
};
newDelegate.DisplayPopover();
}
else
{
// Show the media picker view
viewController.PresentViewController(picker, true, null);
}
// Get the media
return(newDelegate.Task.ContinueWith(
t =>
{
// Dispose popover if any
if (this.popover != null)
{
this.popover.Dispose();
this.popover = null;
}
// Release the media picker delegate
Interlocked.Exchange(ref this.pickerDelegate, null);
return t;
}).Unwrap());
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaPickerController"/> class.
/// </summary>
/// <param name="mediaDelegate">The media picker delegate.</param>
internal MediaPickerController(MediaPickerDelegate mediaDelegate)
{
base.Delegate = mediaDelegate;
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaPickerPopoverDelegate"/> class.
/// </summary>
/// <param name="pickerDelegate">The media picker delegate.</param>
/// <param name="picker">The media picker controller.</param>
internal MediaPickerPopoverDelegate(MediaPickerDelegate pickerDelegate, UIImagePickerController picker)
{
this.pickerDelegate = pickerDelegate;
this.picker = picker;
}