Unity 物体触碰事件监听

声明委托

public delegate void MyDelegate(Collider trigger);

定义委托

public MyDelegate onTriggerEnter;
public MyDelegate onTriggerStay;
public MyDelegate onTriggerExit;

动态挂载

public static Listener Get(GameObject go)
{
    Listener listener = go.GetComponent<Listener>();
    if (listener == null) 
        listener = go.AddComponent<Listener>();
    return listener;
}

监听

private void OnTriggerEnter(Collider trigger)
{
    onTriggerEnter?.Invoke(trigger);
}
private void OnTriggerStay(Collider trigger)
{
    onTriggerStay?.Invoke(trigger);
}
private void OnTriggerExit(Collider trigger)
{
    onTriggerExit?.Invoke(trigger);
}

示例

GameObject colliderObj;

Listener.Get(colliderObj).onTriggerEnter += OnEnter;
Listener.Get(colliderObj).onTriggerStay += OnStay;
Listener.Get(colliderObj).onTriggerExit += OnExit;

void OnEnter(Collider trigger)
{
    Debug.Log("物体" + trigger.name + "进入");
}
void OnStay(Collider trigger)
{
    Debug.Log("物体" + trigger.name + "停留");
}
void OnExit(Collider trigger)
{
    Debug.Log("物体" + trigger.name + "退出");
}