Unity3D C＃/变量已分配但从未使用过（？）

Question

I have a little problem, I have my variables written and I can see them declared and used, but the unity console says its value is never used... The variable is distanceY

"Assets/Scripts/CameraWindowMove.cs(17,22): warning CS0414: The private field `CameraWindowMove.distanceY' is assigned but its value is never used"

I don't know what's the problem, can some one help me?

Here's the sample of the code:

float distanceX, distanceY;

void Awake ()
{
    playerBoxCollider = GameObject.Find ("Player").GetComponent<BoxCollider2D> ();
    windowBoxCollider = GetComponent<BoxCollider2D> ();
    player = GameObject.Find ("Player");

}

void Start ()
{
    x = transform.position.x;
    y = transform.position.y;
    lookAhead = 0;
    distanceX = ((windowBoxCollider.bounds.size.x / 2) - (playerBoxCollider.bounds.size.x / 2));
    distanceY = ((windowBoxCollider.bounds.size.y / 2) - (playerBoxCollider.bounds.size.y / 2));

Answer 1

此警告告诉您，您仅将value设置为distanceY，但未在任何地方使用它的值。

Answer 2

This is just a build warning, it will not affect the functionality of your program. This is a valuable warning though, it is letting you know that you created a variable, assigned a value to it, but then never used it at a later point in your program (as far as static analysis can see).

In C# you can disable them via a pragma at the top of your script file

Some common are:

#pragma warning disable 0168  // variable declared but not used.
#pragma warning disable 0219  // variable assigned but not used.
#pragma warning disable 0414  // private field assigned but not used.

I would not suggest using these disables though as these warnings are useful. This is just for development.