public static async Task <NavigationStack> DeserializeAsync()
{
NavigationStack result = new NavigationStack();
if (!await FileHelper.IsLocalFileExistsAsync("callstack.data", false))
{
return(result);
}
var localFile = await FileHelper.GetLocalFileAsync("callstack.data", false);
using (var fileStream = await localFile.OpenReadAsync())
{
using (var reader = new DataReader(fileStream))
{
reader.InputStreamOptions = InputStreamOptions.ReadAhead;
await reader.LoadAsync((uint)fileStream.Size);
var stacksCount = reader.ReadInt32();
for (var index = 0; index < stacksCount; index++)
{
result.StatesStack.Add(StackData.Deserialize(reader));
}
}
}
return(result);
}
public async Task <bool> DeserializeAsync()
{
try
{
navigationStack = await NavigationStack.DeserializeAsync();
return(navigationStack.StatesStack.Count != 0);
}
catch
{
return(false);
}
}