Input.GetButton

Description

当按住 buttonName 标识的虚拟按钮时，返回 true。

Think auto fire - this will return true as long as the button is held down.

Use this only when implementing events that trigger an action, eg, shooting a weapon. Use GetAxis for input that controls continuous movement.

// Instantiates a projectile every 0.5 seconds,
// if the Fire1 button (default is Ctrl) is pressed.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public GameObject projectile;
    public float fireDelta = 0.5F;

    private float nextFire = 0.5F;
    private GameObject newProjectile;
    private float myTime = 0.0F;

    void Update()
    {
        myTime = myTime + Time.deltaTime;

        if (Input.GetButton("Fire1") && myTime > nextFire)
        {
            nextFire = myTime + fireDelta;
            newProjectile = Instantiate(projectile, transform.position, transform.rotation) as GameObject;

            // create code here that animates the newProjectile

            nextFire = nextFire - myTime;
            myTime = 0.0F;
        }
    }
}