我正在尝试将UIView与Arkit 3D空间一起使用。我看过一些示例,这些示例要求将UIView或UIView的图层设置为SCNMaterial对象的分散内容。到目前为止,这还没有达到我的预期。我只看到视图的框架,但未添加其中的子视图,可见层的拐角半径也未添加。
func setupBillBoard() {
let view = PlayerView(frame: CGRect(x: 0, y: 0, width: 70, height: 40))
view.backgroundColor = .red
view.layer.cornerRadius = 14
let material = SCNMaterial()
material.diffuse.contents = view.asImage()
material.isDoubleSided = true
let plane = SCNPlane(width: 1, height: 1)
plane.materials = [material]
let node = SCNNode()
node.geometry = plane
node.position = SCNVector3(box.x, box.y + 0.3, box.z - 0.4)
node.scale = SCNVector3(0.4, 0.4, 0.4)
self.billBoardNode = node
}
查看扩展名以将UIView转换为图像捕获
extension UIView {
func asImage() -> UIImage {
let renderer = UIGraphicsImageRenderer(bounds: bounds)
return renderer.image { rendererContext in
layer.render(in: rendererContext.cgContext)
}
}
}
到目前为止,我在场景中只看到一个红色正方形的视图,仅此而已
此处为自定义课程代码:https://www.paste.org/106551附件中的Xib
这是我设置地雷的方式,它工作正常。您应该可以将功能复制并粘贴到viewDidLoad
内,您会看到一个红色圆圈。您也可以使用UIImageView
代替UIView
。
创建后,自定义UIView
调用yourView.layoutIfNeeded()
,然后将其添加到SCNMaterial
。
您还可以在几何图形上设置拐角半径:plane.cornerRadius = 0.015
就像我在createAndPositionGrayNode()
中所做的一样
override func viewDidLoad() {
super.viewDidLoad()
createAndPositionRedCircleNode()
// or try it with an imageView, comment out the line above
// createAndPositionGrayNode()
}
func createAndPositionRedCircleNode() {
let redImage = UIColor.red.imageRepresentation
let myView = UIView()
myView.frame = CGRect(x: 0, y: 0, width: 250, height: 250)
myView.layer.contents = redImage.cgImage
myView.layoutIfNeeded()
myView.layer.contentsGravity = CALayerContentsGravity.resizeAspectFill
myView.layer.contentsScale = UIScreen.main.scale
myView.layer.masksToBounds = true
myView.layer.cornerRadius = myView.frame.width / 2
let convertedImage = myView.asImage()
let material = SCNMaterial()
material.diffuse.contents = convertedImage
let plane = SCNPlane(width: 0.15, height: 0.15)
plane.materials = [material]
plane.firstMaterial?.isDoubleSided = true
let redNode = SCNNode(geometry: plane)
redNode.name = "redNode"
redNode.position = SCNVector3(0.0, 0.2, -0.7)
sceneView.scene.rootNode.addChildNode(redNode)
}
func createAndPositionGrayNode() {
let lightGrayImage = UIColor.lightGray.imageRepresentation
let imageView = UIImageView()
imageView.frame = CGRect(x: 0, y: 0, width: 250, height: 250)
imageView.image = lightGrayImage
imageView.contentMode = .scaleAspectFit
imageView.backgroundColor = .clear
imageView.layer.masksToBounds = true
let material = SCNMaterial()
material.diffuse.contents = imageView.image
let plane = SCNPlane(width: 0.4, height: 0.4)
plane.materials = [material]
plane.firstMaterial?.isDoubleSided = true
plane.cornerRadius = 0.015 // <-- geometry cornerRadius set here
let grayNode = SCNNode(geometry: plane)
grayNode.name = "grayNode"
grayNode.position = SCNVector3(0.0, 0.2, -0.7)
sceneView.scene.rootNode.addChildNode(grayNode)
}
extension UIView {
func asImage() -> UIImage {
let renderer = UIGraphicsImageRenderer(bounds: bounds)
return renderer.image { rendererContext in
layer.render(in: rendererContext.cgContext)
}
}
}