示例#1
0
        public void PhotoLibraryDidChange(PHChange changeInstance)
        {
            // Call might come on any background queue. Re-dispatch to the main queue to handle it.
            DispatchQueue.MainQueue.DispatchAsync(() => {
                // Check if there are changes to the asset we're displaying.
                PHObjectChangeDetails changeDetails = changeInstance.GetObjectChangeDetails(Asset);
                if (changeDetails == null)
                {
                    return;
                }

                // Get the updated asset.
                // TODO: check return type. Catch! ObjectAfterChanges should be PHObject instead of NSObject https://bugzilla.xamarin.com/show_bug.cgi?id=35540
                Asset = (PHAsset)changeDetails.ObjectAfterChanges;
                if (Asset != null)
                {
                    FavoriteButton.Title = Asset.Favorite ? "♥︎" : "♡";
                }

                // If the asset's content changed, update the image and stop any video playback.
                if (changeDetails.AssetContentChanged)
                {
                    UpdateImage();

                    playerLayer?.RemoveFromSuperLayer();
                    playerLayer = null;
                }
            });
        }
        public void PhotoLibraryDidChange(PHChange changeInstance)
        {
            // Call might come on any background queue. Re-dispatch to the main queue to handle it.
            DispatchQueue.MainQueue.DispatchAsync(() =>
            {
                // Check if there are changes to the asset we're displaying.
                PHObjectChangeDetails changeDetails = changeInstance.GetObjectChangeDetails(Asset);
                if (changeDetails == null)
                {
                    return;
                }

                // Get the updated asset.
                var assetAfterChanges = changeDetails.ObjectAfterChanges as PHAsset;
                if (assetAfterChanges == null)
                {
                    return;
                }

                Asset = (PHAsset)assetAfterChanges;

                if (Asset != null)
                {
                    FavoriteButton.Title = Asset.Favorite ? "♥︎" : "♡";
                }

                // If the asset's content changed, update the image and stop any video playback.
                if (changeDetails.AssetContentChanged)
                {
                    UpdateContent();

                    playerLayer?.RemoveFromSuperLayer();
                    playerLayer  = null;
                    playerLooper = null;
                }
            });
        }
		public void PhotoLibraryDidChange (PHChange changeInstance)
		{
			// Call might come on any background queue. Re-dispatch to the main queue to handle it.
			DispatchQueue.MainQueue.DispatchAsync (() => {
				// Check if there are changes to the asset we're displaying.
				PHObjectChangeDetails changeDetails = changeInstance.GetObjectChangeDetails (Asset);
				if (changeDetails == null)
					return;

				// Get the updated asset.
				// TODO check return type. Catch! ObjectAfterChanges should be PHObject instead of NSObject https://bugzilla.xamarin.com/show_bug.cgi?id=35540
				Asset = (PHAsset)changeDetails.ObjectAfterChanges;

				// If the asset's content changed, update the image and stop any video playback.
				if (changeDetails.AssetContentChanged) {
					UpdateImage ();
					RemovePlayerLayer ();
				}
			});
		}