void HandleUIEvents() { loginButton.onClick.AddListener(() => { if (isSubmit) { ShowFormError("It's already try to logging in..."); return; } string id = idText.text; string pw = pwText.text; if (id == "") { ShowFormError("ID is required."); return; } else if (pw == "") { ShowFormError("Password is required."); return; } HideFormError(); WWWForm formData = new WWWForm(); formData.AddField("id", id); formData.AddField("password", pw); Submit(formData); }); registerButton.onClick.AddListener(() => { HideFormError(); registerForm.ResetForm(); loginUI.SetActive(false); registerUI.SetActive(true); }); exitButton.onClick.AddListener(() => { Application.Quit(); }); }