AR虚拟按键为真实识别图上的按键，通过按键可以实现真实与虚拟之间的按键交流

（一）添加按键

点击target，打开advance，添加虚拟按键，即可在此target下添加虚拟按键

注：虚拟按键无法旋转，只能更改长宽，可以通过Name给虚拟按键添加一个标识，通过name访问到此按键

（二）按键触发

public class VirtualBtnController : MonoBehaviour,IVirtualButtonEventHandler//通过接口实现点击事件{    public VirtualButtonBehaviour[] virtualButtons;    public UnityEngine.UI.Button[] structureButtons;    //public UnityEngine.UI.Button[] structureButtonsCT;    public void OnButtonPressed(VirtualButtonBehaviour vb)    {        Debug.Log("Virtual button "+vb.VirtualButtonName+" pressed");        //BC virtual button function        if(vb.VirtualButtonName.Contains("BildgeShell"))//通过Name确认点击俺就        {            structureButtons[0].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("BottomSlop"))        {            structureButtons[2].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("BildgeFloor"))        {            structureButtons[1].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("Longitudianal"))        {            structureButtons[4].onClick.Invoke();        }        //CT virtual button fuction        if (vb.VirtualButtonName.Contains("DeckBeam"))        {            structureButtons[0].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("Floor"))        {            structureButtons[1].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("InnerShell"))        {            structureButtons[2].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("OutShell"))        {            structureButtons[3].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("LongiBH"))        {            structureButtons[4].onClick.Invoke();        }        if (vb.VirtualButtonName.Contains("TransBH"))        {            structureButtons[5].onClick.Invoke();        }    }    public void OnButtonReleased(VirtualButtonBehaviour vb)    {        Debug.Log("Virtual button released");    }    void Start ()    {        foreach(var vb in virtualButtons)        {            vb.RegisterEventHandler(this);        }    }}