public static void CreateObject(PackageItem item, UIPackage.CreateObjectCallback callback)
{
Timers.inst.StartCoroutine(_CreateObject(item, callback));
}
private static void CreateGObjectAsync(UIPackage.CreateObjectCallback result)
{
UIPackage.CreateObjectAsync(UIPackageName, UIResName, result);
}
static IEnumerator _CreateObject(PackageItem item, UIPackage.CreateObjectCallback callback)
{
Stats.LatestObjectCreation = 0;
Stats.LatestGraphicsCreation = 0;
float frameTime = UIConfig.frameTimeForAsyncUIConstruction;
List <DisplayListItem> itemList = new List <DisplayListItem>();
DisplayListItem di = new DisplayListItem(item, ObjectType.Component);
di.childCount = CollectComponentChildren(item, itemList);
itemList.Add(di);
int cnt = itemList.Count;
List <GObject> objectPool = new List <GObject>(cnt);
GObject obj;
float t = Time.realtimeSinceStartup;
bool alreadyNextFrame = false;
for (int i = 0; i < cnt; i++)
{
di = itemList[i];
if (di.packageItem != null)
{
obj = UIObjectFactory.NewObject(di.packageItem);
obj.packageItem = di.packageItem;
objectPool.Add(obj);
UIPackage._constructing++;
if (di.packageItem.type == PackageItemType.Component)
{
int poolStart = objectPool.Count - di.childCount - 1;
((GComponent)obj).ConstructFromResource(objectPool, poolStart);
objectPool.RemoveRange(poolStart, di.childCount);
}
else
{
obj.ConstructFromResource();
}
UIPackage._constructing--;
}
else
{
obj = UIObjectFactory.NewObject(di.type);
objectPool.Add(obj);
if (di.type == ObjectType.List && di.listItemCount > 0)
{
int poolStart = objectPool.Count - di.listItemCount - 1;
for (int k = 0; k < di.listItemCount; k++) //把他们都放到pool里，这样GList在创建时就不需要创建对象了
{
((GList)obj).itemPool.ReturnObject(objectPool[k + poolStart]);
}
objectPool.RemoveRange(poolStart, di.listItemCount);
}
}
if ((i % 5 == 0) && Time.realtimeSinceStartup - t >= frameTime)
{
yield return(null);
t = Time.realtimeSinceStartup;
alreadyNextFrame = true;
}
}
if (!alreadyNextFrame) //强制至至少下一帧才调用callback，避免调用者逻辑出错
{
yield return(null);
}
callback(objectPool[0]);
}
