Question

JavaScript => public static function GetButtonDown(buttonName: string): bool;
C# => public static bool GetButtonDown(string buttonName);

Description 描述

Returns true during the frame the user pressed down the virtual button identified by buttonName.

在用户按下由buttonName名称确定的虚拟按钮的那一帧返回true。

You need to call this function from the Update function, since the state gets reset each frame. It will not return true until the user has released the key and pressed it again.

你需要在Update方法中调用这个方法，此后每一帧重置状态时，它将不会返回true除非用户释放此按键然后重新按下。

Use this only when implementing action like events IE: shooting a weapon. Use Input.GetAxis for any kind of movement behaviour.

只有当执行像武器射击这样的事件时才可用此方法，Input.GetAxis适用于各种运动行为。

JavaScript:

	// Instantiates a projectile whenever the user hits the Fire1 Button.
 
	var projectile : GameObject;
	function Update () {
		if (Input.GetButtonDown ("Fire1")) {
			Instantiate (projectile, transform.position, transform.rotation);
		}
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    public GameObject projectile;
    void Update() {
        if (Input.GetButtonDown("Fire1"))
            Instantiate(projectile, transform.position, transform.rotation) as GameObject;
 
    }
}

Input