在ARKit中，可以使用ARPlaneAnchor来检测和跟踪平面。如果ARKit检测到的特征点不在平面上，可以使用以下方法来解决：

1. 使用ARPlaneAnchor检测平面：

func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
    guard let planeAnchor = anchor as? ARPlaneAnchor else {
        return
    }
    
    // 检测到平面，可以在此处执行相应的操作
}

2. 验证特征点是否在平面上：

func renderer(_ renderer: SCNSceneRenderer, updateAtTime time: TimeInterval) {
    guard let frame = sceneView.session.currentFrame else {
        return
    }
    
    let points = frame.rawFeaturePoints.points
    let pointsCount = frame.rawFeaturePoints.count
    
    for i in 0..

func renderer(_ renderer: SCNSceneRenderer, updateAtTime time: TimeInterval) {
    guard let frame = sceneView.session.currentFrame else {
        return
    }
    
    let points = frame.rawFeaturePoints.points
    let pointsCount = frame.rawFeaturePoints.count
    
    for i in 0..