Problem with gestureRecognizer

Question

Created Jan ’22

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Participants 2

Hi, i'm new in xcode and swift and I tried to add gestures to my AR View. But it failed. I can see the modell (a helix) when opening with my iPhone and move around but I can't rotate the modell with my fingers. I didn't get any error message in xcode.

TestSpiral is a simple .rcproject file I generated in RealityComposer.

I use xcode 12.4.

Thanks for your help.

Sorry. I tried to attach the project but this is not possible. This is the code:

code-block
import UIKit
import RealityKit
import ARKit
import SceneKit


class ViewController: UIViewController {
   
@IBOutlet var gestureRecognizer: UIRotationGestureRecognizer!   

// DECLARE VARIABLE MODELANCHOR
    var modelAnchor: TestSpiral.MainScene?

// ALLOW INTERACTION
  var isUserInteractionEnabled = Bool (true)
   
// DECLARE VARIABLE ARVIEW
  @IBOutlet weak var sceneView: ARView!
   
   
   
   
  override func viewDidLoad() {
    super.viewDidLoad()
     
     
     
// GESTURE ROTATION
    func rotatePiece(_ gestureRecognizer: UIRotationGestureRecognizer) {
       
      guard gestureRecognizer.view != nil else {return}
       
      if gestureRecognizer.state == .began || gestureRecognizer.state == .changed {
        gestureRecognizer.view?.transform = gestureRecognizer.view!.transform.rotated(by: gestureRecognizer.rotation)
        gestureRecognizer.rotation = 0
      }}
     
     
// LOAD MODELL
    modelAnchor = try! TestSpiral.loadMainScene()
      sceneView.scene.anchors.append(modelAnchor!)
     
  }
     
}

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Answer 1

Claude31 OP

Jan ’22

Could you add a log:

      if gestureRecognizer.state == .began || gestureRecognizer.state == .changed {
        print("rotation", rotation)
        gestureRecognizer.view?.transform = gestureRecognizer.view!.transform.rotated(by: gestureRecognizer.rotation)
        gestureRecognizer.rotation = 0
      }}

Don't you need to recognise multiple gestures ?

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }

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