/// <summary>
/// 异步获取实例
/// </summary>
/// <returns></returns>
public static async Task <MemoryViewModel> GetInstanceAsync(MemoryModel memoryModel = null)
{
var memoryViewModel = new MemoryViewModel(memoryModel)
{
_imageViewModels = new List <ImageViewModel>()
};
if (memoryModel?.ImageModels == null)
{
return(memoryViewModel);
}
foreach (var imageModel in memoryModel.ImageModels)
{
var imageViewModel = await ImageViewModel.GetInstanceAsync(imageModel);
memoryViewModel._imageViewModels.Add(imageViewModel);
}
if (memoryViewModel._imageViewModels != null && memoryViewModel._imageViewModels.Count > 0)
{
memoryViewModel.CoverImage = memoryViewModel._imageViewModels[0].ThumbnailImage;
}
else
{
memoryViewModel.CoverImage = new BitmapImage(new Uri("ms-appx:///Assets/Gray.png"));
}
return(memoryViewModel);
}
/// <summary>
/// 按月份分类图片
/// </summary>
private async Task GroupImageAsync()
{
// 先初始化所有图片成一个list
var imageViewModels = new List <ImageViewModel>();
foreach (var imageFolderList in _imageFolderLists)
{
foreach (var imageModel in imageFolderList.ImageModels)
{
var imageViewModel = await ImageViewModel.GetInstanceAsync(imageModel);
imageViewModels.Add(imageViewModel);
}
}
ImageMonthGroups = imageViewModels
.GroupBy(m => m.MonthYearDate, (key, list) => new ImageMonthGroup(key, list))
.OrderByDescending(m => m.Key.WholeDateTime.Year).ThenByDescending(m => m.Key.WholeDateTime.Month);
}
