MetalKit Xcode 12 wrong bound size iPhone XS Max

Question

mjeragh OP

Created Sep ’20

Replies 2

Boosts 0

Participants 1

Creating a default metalkit app from the game template and running it on the iPhone XS Max device gets the wrong bounds

Code Block (lldb) po view.bounds
▿ (0.0, 0.0, 320.0, 480.0)
  ▿ origin : (0.0, 0.0)
    - x : 0.0
    - y : 0.0
  ▿ size : (320.0, 480.0)
    - width : 320.0
    - height : 480.0

and does not invoke mtkview delegate function when rotating.

Everything works fine on an iPad Pro.

Please Help

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Answer 1

mjeragh OP

Sep ’20

Just an update, the mtkView function

Code Block extension Renderer: MTKViewDelegate {
  func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {
    .....
  }
....
}

gets invoked on the simulator and on the iPad during debugging, it does not get invoked during debugging on an iPhone device.

It does get invoked during running without debugging! I just tried Xcode 12.2 beta and the same result!

Please help

0

Answer 2

mjeragh OP

Sep ’20

Another update, by adding the following code to the GameViewController everything works during debugging

Code Block override func willTransition(to newCollection: UITraitCollection, with coordinator: UIViewControllerTransitionCoordinator) {
        coordinator.animate(alongsideTransition: { context in
            if UIApplication.shared.statusBarOrientation.isLandscape {
                // activate landscape changes
                os_log("Landscape")
            } else {
                // activate portrait changes
                os_log("portrait")
            }
        })
    }

Can someone please explain why?

Thank you in advance!

0