unity3-unity c#中為什麼不能直接更改transform.position.x的值？

unity c#中為什麼不能直接更改transform.position.x的值？

The reason you can't directly alter the position vector is because it's actually a copy, not the actual position stored on the transform.

transform.position <--- returns a copy of the position
transform.position.x <--- the "x" value of the copy
transform.position.x = 7.0f <--- sets the "x" value on the copy

C# throws an error because you're setting the "x" value on a copy, which is then destroyed. It's a pointless line that if the compiler didn't pick up on it, could cause a tonne of hair pulling.

UnityScript gets around this when it compiles by converting your code and firing the C# setter:
transform.position.x = 7.0f
when compiled in UnityScript, translates (more or less) to:
var tempVector : Vector3 = transform.position;
tempVector.x = 7.0f;
transform.position = tempVector;

You can infer that because if you replicate this with a custom C# class, you can track as the getters/setters are invoked.

權威資料是這樣解釋的。這個如何解釋，transform.position（position是Vector3類型的）,transform是類。vector3是結構體的，vector3創建的可以直接修改x值，為什麼這個position.x就不可以，實在不明白了？

最佳回答：

找到方法了，不是開放那邊的定的