1.you can't determine whether or not a child object is currently active in the scene by reading its activeSelf property. Instead, you should use the  property, which takes the overriding effect of the parent into account.

你不能单靠读取一个对象的activeSelf属性值来判断这个对象是否处于激活状态。取而代之的是你应该使用activeInHierarchy属性，它会把父对象的状态考虑在内。