输入密码删除判断

Assets/HotUpdate/Scripts/LoginPassWordManager.cs

@@ -52,7 +52,8 @@ public class LoginPassWordManager : MonoSingleton<LoginPassWordManager>
             }
         }else if(num == "R")
         {
-            tmpField.text = tmpField.text.Remove(tmpField.text.Length-1);
+            if (tmpField.text.Length > 0)
+                tmpField.text = tmpField.text.Remove(tmpField.text.Length - 1);
         }
     }
 }