c# - 用于使角色左右移动的 Unity UI 按钮不起作用

Question

我正在为手机制作 2D 游戏，我想使用 UI 按钮作为 Controller ，而不是我用来在笔记本电脑上测试游戏的键盘键。

这是我用于角色的代码:

public float moveSpeed;
private float moveVelocity;
public float jumpHeight;
public Transform tagGround;
public float groundCheckRadius;
public LayerMask playerMask;
private bool IsGrounded;
public Animator anim;

void Start ()
{
    anim = GetComponent<Animator>();
}

void FixedUpdate ()
{
    IsGrounded = Physics2D.OverlapCircle (tagGround.position, groundCheckRadius, playerMask);
}


void Update()
{
    moveVelocity = 0f;

    if (Input.GetKeyDown (KeyCode.W) && IsGrounded) {
        Jump ();
    }

    if (Input.GetKey (KeyCode.D)) {
        Right ();
    }

    if (Input.GetKey (KeyCode.A)) {
        Left ();
    }

    GetComponent<Rigidbody2D> ().velocity = new Vector2 (moveVelocity, GetComponent<Rigidbody2D> ().velocity.y);

    anim.SetFloat ("Speed", Mathf.Abs(GetComponent<Rigidbody2D> ().velocity.x)); 
    anim.SetBool ("isGrounded", IsGrounded);
    anim.SetBool ("Attacking", false);

    if (Input.GetKeyDown (KeyCode.S)) {
        Atk ();
    }

    if (GetComponent<Rigidbody2D> ().velocity.x > 0)
        transform.localScale = new Vector3(1f, 1f, 1f);
    else if (GetComponent<Rigidbody2D> ().velocity.x < 0)
        transform.localScale = new Vector3(-1f, 1f, 1f);

}

我为每次按键设置了适当的功能，它们都运行良好。我用 UI 按钮调用了这些函数，Jump 和 Attack 工作得很好，但是 Left 和 Right 不行不工作。

这是我的按钮脚本的属性:

Answer 1

希望它有用:

public void OnPointerDown (PointerEventData eventData)
{
    btn_pressed = true;
}

public void OnPointerUp (PointerEventData eventData)
{
    btn_pressed = false;
}

if(btn_pressed)
{
    //code
{