public override async Task Initialize()
{
ChatMessages = new MvxObservableCollection <ChatMessage>();
OpenMessageCommand = new MvxAsyncCommand <ChatMessage>(async(e) => {
if (e.Files?.Count > 0)
{
await OpenMessage(e);
}
});
BeginTime = EndTime = DateTime.Now;
if (timer == null)
{
timer = new Timer(App.Context.PullMessageTime * 1000);
timer.Elapsed += async(sender, e) =>
{
if (LoadNewMessageTask == null || LoadNewMessageTask.IsCompleted)
{
await LoadNewMessage.ExecuteAsync();
}
};
}
timer.Start();
await LoadChatMessages();
await base.Initialize();
}
public override void ViewAppeared()
{
Log.Info("ViewDisappearing");
if (timer == null)
{
timer = new Timer(App.Context.PullMessageTime * 1000);
timer.Elapsed += async(sender, e) =>
{
if (LoadNewMessageTask == null || LoadNewMessageTask.IsCompleted)
{
await LoadNewMessage.ExecuteAsync();
}
};
}
if (timer != null)
{
timer.Start();
}
base.ViewAppeared();
}