private string GetRandomHint()
{
if (ConstantManager.GetInstance() == null)
{
return("");
}
List <string> hints = ConstantManager.GetHintConst();
if (hints == null || hints.Count <= 0)
{
return(ConstantManager.HINT_DEFAULT);
}
int random = Random.Range(0, hints.Count);
return(hints[random]);
}