Creating the PostDetail View & ViewModel

GitHub repo for the demo GitHub repo for this book

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I will not post all the codes here and you can get the codes from the GitHub repo: https://github.com/yanxiaodi/MvvmCrossDemo. I also created a new Comment model, a service interface and the implementation for comments. Now look at the codes in the PostDetailViewModel:
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namespace MvvmCrossDemo.Core.ViewModels
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{
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    public class PostDetailViewModel : MvxViewModel
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    {
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        private readonly IPostService _postService;
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​
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        public PostDetailViewModel(IPostService postService)
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        {
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            _postService = postService;
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        }
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​
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        public override void Prepare()
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        {
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            // This is the first method to be called after construction
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            CommentList = new MvxObservableCollection<Comment>();
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​
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        }
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​
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        public override async Task Initialize()
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        {
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            // Async initialization, YEY!
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​
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            await base.Initialize();
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        }
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​
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​
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        #region Post;
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        private Post _post;
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        public Post Post
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        {
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            get => _post;
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            set => SetProperty(ref _post, value);
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        }
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        #endregion
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​
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        #region CommentList;
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        private MvxObservableCollection<Comment> _commentList;
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        public MvxObservableCollection<Comment> CommentList
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        {
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            get => _commentList;
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            set => SetProperty(ref _commentList, value);
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        }
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        #endregion
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​
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        private async Task GetPost(int postId)
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        {
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            var response = await _postService.GetPost(postId);
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            if (response.IsSuccess)
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            {
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                Post = response.Result;
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            }
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        }
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​
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        private async Task TaskGetComments(int postId)
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        {
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            var response = await _postService.GetComments(postId);
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            if (response.IsSuccess)
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            {
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                CommentList.AddRange(response.Result);
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            }
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        }
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    }
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}
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In this ViewModel, we have to get the postId from the previous view for the data initialization. But how to pass the param to the PostDetailViewModel?

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