swift - 如何在第一层SWIFT上添加SKNode

Question

我正在尝试在场景中添加 SKShapeNode，但如果我使用它:

let rect = SKShapeNode(SKShapeNode(rect: CGRectMake(0, 0, 100, 100)))
self.addChild(rect)

该矩形添加在最后一层并与其他节点重叠。那么，如何在第一层添加呢？

提前致谢

Answer 1

您需要设置zPosition您的 SKNode 的属性。来自文档:

The default value is 0.0. The positive z axis is projected toward the viewer so that nodes with larger z values are closer to the viewer. When a node tree is rendered, the height of each node (in absolute coordinates) is calculated and then all nodes in the tree are rendered from smallest z value to largest z value. If multiple nodes share the same z position, those nodes are sorted so that parent nodes are drawn before their children, and siblings are rendered in the order that they appear in their parent’s children array. Hit-testing is processed in the opposite order.

The SKView class’s ignoresSiblingOrder property controls whether node sorting is enabled for nodes at the same z position.

由于您似乎希望将 rect 节点置于其他节点下方，并且默认 zPosition 为 0.0，因此尝试将其设置为 -1.0:

let rect = SKShapeNode(SKShapeNode(rect: CGRectMake(0, 0, 100, 100)))
rect.zPosition = -1.0
self.addChild(rect)