/// <summary>下拉框改变事件</summary>
public static void AddChange(this Dropdown drop, UnityAction <int> action)
{
drop.onValueChanged.AddListener(action);
//修复Unity2019下拉框在不在Default层显示不出来的BUG
drop.AddClick(() => {
var list = drop.GetComponentsInChildren <Canvas>();
Canvas parent = drop.GetComponentInParent <Canvas>();
if (parent != null)
{
for (int i = 0; i < list.Length; i++)
{
list[i].sortingLayerID = parent.sortingLayerID;
}
}
});
}
