问题

在Unity旧的输入系统InputManager，只提供接口Input.GetButton()、GetButtonDown()、GetButtonUp()这三种对按键状态的判断。缺少对Click行为的判断。

解决方法

设置一个threshold作为click行为的判定时间
依靠GetButtonDown和GetButtonUp之间计时来做判断

在Update中：

private static bool isComfirmButtonClicked;
    public static bool IsComfirmButtonClicked
    {
    
    
        get => isComfirmButtonClicked;
    }
    
    [SerializeField] private float clickThreshold = 0.2f;
    private float timer;
    private bool hasButtonDown;

    private const string SUBMITBUTTON = "Submit";
    private void Update()
    {
    
    
        if (Input.GetButtonDown(SUBMITBUTTON))
        {
    
    
            hasButtonDown = true;
            timer = 0;
        }

        if (!hasButtonDown)
        {
    
    
            isComfirmButtonClicked = false;
            return;
        }
        else
        {
    
    
            timer += Time.deltaTime;
            if (timer >= clickThreshold)
            {
    
    
                isComfirmButtonClicked = false;
            }
            else
            {
    
    
                if (Input.GetButtonUp(SUBMITBUTTON))
                {
    
    
                    hasButtonDown = false;
                    isComfirmButtonClicked = true;
                }
            }
        }
    }