'hitTest()'在iOS 14.0中被淘汰

Question

我是这方面的新手，目前正在构建一个与AR相关的应用程序，在旧版本上我声明了这个

let results = self.hitTest(screenPosition, types: [.featurePoint])

现在我有一个问题，hitTest在iOS 14.0 中被弃用

hitTest(_:types:)' was deprecated in iOS 14.0: Use [ARSCNView raycastQueryFromPoint:allowingTarget:alignment]

请告诉我如何修复它，谢谢：(

Answer 1

是，使用raycastQuery(from:allowing:alignment:)

正如Xcode以这种方式建议的那样：

...
let location = gesture.location(in: sceneView)
guard let query = sceneView.raycastQuery(from: location, allowing: .existingPlaneInfinite, alignment: .any) else {
return
}

let results = sceneView.session.raycast(query)
guard let hitTestResult = results.first else {
print("No surface found")
return
}
...

Answer 2

您可以为节点分配一个名称，然后在touchesBegan中使用hitTest(point:, options:[SCNHitTestOption : Any]?)。下面是我使用的代码：

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first {
let touchLocation = touch.location(in: sceneView)
let results = sceneView.hitTest(touchLocation, options: [SCNHitTestOption.searchMode : 1])

for result in results.filter({$0.node.name != nil}) {
if result.node.name == "planeNode" {
print("touched the planeNode")
}
}
}
}

Answer 3

别忘了在viewWillAppear中设置configuration.planeDetection在使用下面的代码之前，我假设你想在touchesBegan方法中使用

override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)

let configuration = ARWorldTrackingConfiguration()

configuration.planeDetection = .horizontal
sceneView.session.run(configuration)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

guard let touchLocation = touches.first?.location(in: sceneView) else {return}

guard let query = sceneView.raycastQuery(from: touchLocation, allowing: .existingPlaneGeometry, alignment: .any) else {return}

let results = sceneView.session.raycast(query)
//this is the answer to your question, then you may want to get first result, then
if let hitResult = results.first{

//do what you want

}
}