build error UIApplication.shared is unavailable in app extension

[everwanna]

'shared' is unavailable: Use view controller based solutions where appropriate instead.

I use QRCodeReader in an app extension. Xcode reports the error in,

  @objc public func setNeedsUpdateOrientation() {
    setNeedsDisplay()

    overlayView?.setNeedsDisplay()

    if let connection = reader?.previewLayer.connection, connection.isVideoOrientationSupported {
      let application                    = UIApplication.shared
      let orientation                    = UIDevice.current.orientation
      let supportedInterfaceOrientations = application.supportedInterfaceOrientations(for: application.keyWindow)

      connection.videoOrientation = QRCodeReader.videoOrientation(deviceOrientation: orientation, withSupportedOrientations: supportedInterfaceOrientations, fallbackOrientation: connection.videoOrientation)
    }
  }

UIApplication.shared is not available in app extension.

[nderkach]

See #169

[everwanna]

Thanks!

[yannickl]

Are you using CocaPods? If so you can set the *Require Only App-Extension-Safe API * to NO your target.

Add the following lines in your Podfile:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['APPLICATION_EXTENSION_API_ONLY'] = 'No'
    end
  end
end