private Task <MediaFile> GetMediaAsync(UIImagePickerControllerSourceType sourceType, string mediaType, StoreCameraMediaOptions options = null, CancellationToken token = default(CancellationToken))
{
UIViewController viewController = null;
UIWindow window = UIApplication.SharedApplication.KeyWindow;
if (window == null)
{
throw new InvalidOperationException("There's no current active window");
}
if (window.WindowLevel == UIWindowLevel.Normal)
{
viewController = window.RootViewController;
}
if (viewController == null)
{
window = UIApplication.SharedApplication.Windows.OrderByDescending(w => w.WindowLevel).FirstOrDefault(w => w.RootViewController != null && w.WindowLevel == UIWindowLevel.Normal);
if (window == null)
{
throw new InvalidOperationException("Could not find current view controller");
}
else
{
viewController = window.RootViewController;
}
}
while (viewController.PresentedViewController != null)
{
viewController = viewController.PresentedViewController;
}
if (token.IsCancellationRequested)
{
return(Task.FromResult((MediaFile)null));
}
MediaPickerDelegate ndelegate = new MediaPickerDelegate(viewController, sourceType, options, token);
var od = Interlocked.CompareExchange(ref pickerDelegate, ndelegate, null);
if (od != null)
{
throw new InvalidOperationException("Only one operation can be active at a time");
}
var picker = SetupController(ndelegate, sourceType, mediaType, options);
if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad && sourceType == UIImagePickerControllerSourceType.PhotoLibrary)
{
ndelegate.Popover = popover = new UIPopoverController(picker);
ndelegate.Popover.Delegate = new MediaPickerPopoverDelegate(ndelegate, picker);
ndelegate.DisplayPopover();
token.Register(() =>
{
if (popover == null)
{
return;
}
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
ndelegate.Popover.Dismiss(true);
ndelegate.CancelTask();
});
});
}
else
{
if (UIDevice.CurrentDevice.CheckSystemVersion(9, 0))
{
picker.ModalPresentationStyle = options?.ModalPresentationStyle == MediaPickerModalPresentationStyle.OverFullScreen
? UIModalPresentationStyle.OverFullScreen
: UIModalPresentationStyle.FullScreen;
}
viewController.PresentViewController(picker, true, null);
token.Register(() =>
{
if (picker == null)
{
return;
}
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
picker.DismissModalViewController(true);
ndelegate.CancelTask();
});
});
}
return(ndelegate.Task.ContinueWith(t =>
{
try
{
popover?.Dispose();
}
catch
{
}
popover = null;
Interlocked.Exchange(ref pickerDelegate, null);
try
{
picker?.Dispose();
}
catch
{
}
picker = null;
return t;
}).Unwrap());
}
Task <MediaFile> GetMediaAsync(UIImagePickerControllerSourceType sourceType, string mediaType, StoreCameraMediaOptions options = null, CancellationToken token = default(CancellationToken))
{
var viewController = GetHostViewController();
if (token.IsCancellationRequested)
{
return(Task.FromResult((MediaFile)null));
}
var ndelegate = new MediaPickerDelegate(viewController, sourceType, options, token);
var od = Interlocked.CompareExchange(ref pickerDelegate, ndelegate, null);
if (od != null)
{
throw new InvalidOperationException("Only one operation can be active at a time");
}
var tcs = new TaskCompletionSource <Task>();
var picker = SetupController(ndelegate, sourceType, mediaType, tcs, options);
tcs.Task.ContinueWith(t => Dismiss(popover, picker));
if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad && sourceType == UIImagePickerControllerSourceType.PhotoLibrary)
{
ndelegate.Popover = popover = new UIPopoverController(picker);
ndelegate.Popover.Delegate = new MediaPickerPopoverDelegate(ndelegate, picker);
ndelegate.DisplayPopover();
token.Register(() =>
{
if (popover == null)
{
return;
}
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
ndelegate.Popover.Dismiss(true);
ndelegate.CancelTask();
});
});
}
else
{
if (UIDevice.CurrentDevice.CheckSystemVersion(9, 0))
{
picker.ModalPresentationStyle = options?.ModalPresentationStyle == MediaPickerModalPresentationStyle.OverFullScreen
? UIModalPresentationStyle.OverFullScreen
: UIModalPresentationStyle.FullScreen;
}
viewController.PresentViewController(picker, true, null);
token.Register(() =>
{
if (picker == null)
{
return;
}
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
picker.DismissModalViewController(true);
ndelegate.CancelTask();
});
});
}
return(ndelegate.Task.ContinueWith(t => t.Result == null ? null : t.Result.FirstOrDefault()));
}
