input

鼠标

//当指定的鼠标按钮被按下时返回true
bool result=Input.GetMouseButton(0); 
//在用户按下指定鼠标按键的第一帧返回true
bool result= Input. GetMouseButtonDown(0);
//在用户释放指定鼠标按键的第一帧返回true
bool result= Input. GetMouseButtonUp(0);
//按钮值设定：
0对应左键 ， 1对应右键 ， 2对应中键。

键盘

//当通过名称指定的按键被用户按住时返回true
bool result=Input.GetKey(KeyCode.A);
//当用户按下指定名称按键时的那一帧返回true
bool result=Input. GetKeyDown(KeyCode.A);
//在用户释放给定名称按键的那一帧返回true
bool result=Input. GetKeyUp(KeyCode.A);

手机

GetTouch - Unity 脚本 API
TouchPhase - Unity 脚本 API
Touch - Unity 脚本 API
移动平台也可以识别：OnMouse*

案例：放大镜

瞬间切换

private Camera camera;
private bool isFar;

private void Start()
{
    camera = GetComponent<Camera>();
    isFar = true;
}

private void Update()
{
    if(Input.GEtMouseButtonDown(1))
    {
        isFar = !isFar;
        if(isFar)
            camera.fieldOfView = 60;//摄像头拉远到60
        else
            camera.fieldOfView = 20;//摄像头拉近到20
    }
}

匀速的切换

private Camera camera;
private bool isFar;

private void Start()
{
    camera = GetComponent<Camera>();
    isFar = true;
}

private void Update()
{
    if(Input.GEtMouseButtonDown(1))//按时执行1帧
    {
        isFar = !isFar;        
    }
    //每帧执行
    if(isFar)
    {
        if(camera.fieldOfView < 60)//摄像头拉远到60    
            camera.fieldOfView += 2;    
    }
    else
    {
        if(camera.fieldOfView > 20)//摄像头拉近到20
            camera.fieldOfView -= 2;
    }

}

由快到慢的切换

private Camera camera;
private bool isFar;

private void Start()
{
    camera = GetComponent<Camera>();
    isFar = true;
}

private void Update()
{
    if(Input.GEtMouseButtonDown(1))//按时执行1帧
    {
        isFar = !isFar;        
    }
    //每帧执行
    if(isFar)
    {
        //摄像头拉远到60    
        camera.fieldOfView = Mathf.Lerp(camera.fieldOfView, 60, 0.1);   
        if(Mathf.Abs(camera.fieldOfView - 60) < 0.1f)
            camera.fieldOfView = 60;
    }
    else
    {
        //摄像头拉近到20
        camera.fieldOfView = Mathf.Lerp(camera.fieldOfView, 20, 0.1); 
        if(Mathf.Abs(camera.fieldOfView - 20) < 0.1f)
            camera.fieldOfView = 20;
    }
}

多段切换

private Camera camera;
private bool isFar;
public float[] zoomLevel;
private int index;

private void Start()
{
    camera = GetComponent<Camera>();
}

private void Update()
{
    if(Input.GEtMouseButtonDown(1))//按时执行1帧
    {
        //index = index < zoomLevel.Length - 1? index + 1 : 0;
        index = (index + 1) % zoomLevel.Length;
    }
    //每帧执行 
    camera.fieldOfView = Mathf.Lerp(camera.fieldOfView, zoomLevel[index], 0.1);   
    if(Mathf.Abs(camera.fieldOfView - zoomLevel[index]) < 0.1f)
        camera.fieldOfView = 60;

}

自定义按键

虚拟按键：

位置：Edit-Project Setting-input Manager

获取虚拟轴：虚拟轴名就是input Manager中列表元素的名字

• bool result=Input. GetButton(“虚拟轴名”); //true or false
• bool result=Input. GetButtonDown(“虚拟轴名”);
• bool result=Input. GetButtonUp(“虚拟轴名”);
• float value=Input.GetAxis (“虚拟轴名”); // -1 … 0 … 1
• float value=Input.GetAxisRaw (“虚拟轴名”);//-1 0 1

案例：摄像头旋转

public int rotateSpeed = 5;

private void FixedUpdate()//如果在Update中需要 * Time.deltaTime
{
    //鼠标左右移动
    float x = Input.GetAxis("Mouse X");
    float y = Input.GetAxis("Mouse Y");

    if(x != 0 || y != 0)
    {
        RotateView(x,y);
    }
}

private void RotateView(float x,float y)
{
    x *= rotateSpeed;
    y *= rotateSpeed;

    //视野上下移动，沿X轴旋转
    this.transform.Rotate(-y,0,0);
    //视野左右移动，沿Y轴旋转,需要沿世界坐标系Y轴
    this.transform.Rotate(0,x,0,Space.world);
}

案例：雷电移动

private void Update()
{
    float hor = Input.GetAxis("Horizontal");
    float ver = Input.GetAxis("Vertical");

    if(hor != 0 || ver != 0)
    {
        Movement(hor,ver);
    }
}

public float moveSpeed = 10;
private void Movement(float hor,float ver)
{
    hor *= moveSpeed * Time.deltaTime;
    ver *= moveSpeed * Time.deltaTime;

    this.transform.Translate(hor,0,ver);
}