Godot Engine：Parent和Owner

Parent

• 一个节点的Parent就是场景树上它的父级

Owner

• 一个节点的Owner可以是除自身之外的任意有效的父节点(parent)或者祖父节点(grandparent)即节点树上的上级节点
• 当存储一个节点时它所拥有的节点也都将会被保存
• 如果不修改默认Owner的话，可以把它视为节点所在场景的顶部节点，如果该节点本身就是顶部节点那么它的Owner为null

实验一：静态场景结构中默认的Owner

每个节点的代码是相同的

extends Node

class_name TestNode

func _ready():
	var parent_name = "NULL"
	var owner_name = "NULL"
	if get_parent() != null:
		parent_name = get_parent().name
	if owner != null:
		owner_name = owner.name
	print(name + "'s parent is  and it's owner is " )
	

输出结果

node_3's parent is  and it's owner is 
node_2's parent is  and it's owner is 
node_1's parent is  and it's owner is 
node_0's parent is  and it's owner is 

实验二：动态创建的节点的Owner

extends Node

func _ready():
	var n = TestNode.new()
	n.name = ""
	add_child(n)

输出结果

's parent is  and it's owner is 

小结

• 静态生成的节点的默认Owner是它的父节点，如果它没有父节点则Owner
• 动态生成的节点的默认Owner是null