/// <summary>
/// 删除一张报纸
/// </summary>
/// <param name="newsPaper">要删除的报纸</param>
static async public Task DeleteNewsPaper(NewsPaper newsPaper)
{
OnPaperDeleting?.Invoke(newsPaper);
var paperListinFile = await ReadListFromFile();
//var index = paperListinFile.IndexOf(newsPaper.newsPaperModel);
paperListinFile.Remove(newsPaper.newsPaperModel);
NewsPapers.Remove(newsPaper);
//3、将paperListinFile重新保存到文件中
await FileIO.WriteBytesAsync(paperListFile, App.ObjectToByteArray(paperListinFile));
OnPaperDeleted?.Invoke(newsPaper);
}
private void NewsPaper_OnPaperDeleted(NewsPaper newsPaper)
{
NewsPapers.Remove(newsPaper);
paperNavigationView.SelectedItem = NewsPapers.First();
}