建構、解構及event運用
>--建構、解構--<
public class ClassA
{
//建構子
public ClassA()
{
}
//解構子
~ClassA()
{
}
}
{
object obj = new object; <= 建構
} <= 解構(之後都用不到時)
>--實例，工廠與控制中心--<
public class FactoryConsole
{
public static event Action OperationAllFactory;
public static event Action StopAllFactory;
Factory factory001 = new Factory();
Factory factory002 = new Factory();
Factory factory003 = new Factory();
Factory factory004 = new Factory();
public void StartAllFactory()
{
OperationAllFactory.Invoke();
}
public void StopAllFactory()
{
StopAllFactory.Invoke();
}
}
public class Factory
{
bool isOperation = true;
public Factory()
{
//在建構時先把事件註冊好
FactoryConsole.OperationAllFactory += StartOperation;
FactoryConsole.StopAllFactory += StopOperation;
}
public void StartOperation()
{
isOperation = true;
}
public void StopOperation()
{
isOperation = false;
}
~Factory()
{
//在解構時取消註冊所有事件(即使可能取消過了)，以避免Invoke event時可能的錯誤
FactoryConsole.OperationAllFactory -= StartOperation;
FactoryConsole.StopAllFactory -= StopOperation;
}
}
一些細節
GetSet可以直接添加判斷式
private object obj;
public object Obj { get => obj; set { if (value != null) obj = value; } }
transform是 { get; }
transform等同於 GetComponent<Transform>();
所以每禎調用的話會很吃效能
簡寫if(object != null) { object.Function(); }
可以簡寫成 object?.Function();
如果你無法預期一個Coroutine需要執行多久(禎)，但你需要在他執行完後做某件事，你可以丟一個委派當輸入
IEnumerator WaitRandomSecond(System.Action callback)
{
float duration = UnityEngine.Random.Range(1f, 3f);
yield return new WaitForSeconds(duration);
callback?.Invoke();
}
清除event
用迴圈取出已註冊的事件，一個一個取消
foreach(Delegate d in FindClicked.GetInvocationList())
{
FindClicked -= (FindClickedHandler)d;
}
可以使用 = null 來清除，但不建議
LINE