private async void ImgFavorite_Clicked(object sender, EventArgs e)
{
if (postData == null)
{
return;
}
imgFavorite.Source = Helper.GetIsFavoriteIconUri();
bool isFav = await Favorite.inFavorite(postData.PostID);
if (!isFav)
{
Favorite.AddToFavofite(postData.PostID);
}
}