问题描述
今天，我在Unity项目中遇到了一些有趣的C#代码:
Today I've come across an interesting bit of C# code in a Unity project:
MyScript ms = new MyScript(); //MyScript derives from MonoBehaviour
ms = null;
if(!ms) { Debug.Log("ms = "+(ms==null)); }
它的行为似乎与以下内容相同:
It does seem to behave the same as:
if(ms == null) { /*Do Stuff*/ }
但这真的是同一回事吗?我还没有找到关于此的任何文档.有没有理由不使用较短的版本，或者不喜欢使用另一个版本?
But is it really the same thing? I haven't found any documentation about this anywhere yet. Is there a reason to not use the shorter version or prefer one over the other?
推荐答案
否.您可以使用Javascript来实现，但是C#不能那样工作，除非myobject实际上是一个布尔值.
No. You can do that in Javascript, but C# doesn't work like that unless myobject is actually a boolean.
基于此评论:
以及来自 MonoBehavior文档:
Operators
bool Does the object exist?
operator != Compares if two objects refer to a different object.
您似乎可以对变量执行此操作，因为它可以隐式转换为bool.但是对于C#来说通常不行.
It looks like you can do this for your variable, becuase it is implicitly convertible to bool. But it's not generally okay for C#.
这篇关于是"if(！myobject)"与"if(myobject == null)"相同吗?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！