MotionOrientation

Notifies changes in device orientation using CoreMotion on iOS, sending updates through NotificationCenter.
It enables detection of device orientation and interface orientation while keeping the UI orientation locked, such as when the device is restricted to 'Portrait Orientation Lock'. This makes it possible to respond to orientation changes even when the UI itself does not rotate.

Requirements

This codes are under ARC.

These frameworks are needed.

CoreMotion.framework
CoreGraphics.framework

Usage

1. Add this code before receive the orientation changes.

MotionOrientation.sharedInstance().start()

2. Then you can receive notifications from NotificationCenter.default

MotionOrientationChangedNotification, when the device orientation changed.

@objc private func deviceOrientationDidChange(notification: NSNotification) {
  // You can get it from userInfo with key kMotionOrientationDeviceOrientationKey
  if let userInfo = notification.userInfo,
     let rawValue = userInfo[kMotionOrientationDeviceOrientationKey] as? NSNumber,
     let orientation = UIDeviceOrientation(rawValue: rawValue.intValue) {
       print("new device orientation from userInfo: " + orientation)
  }

  // or get it from sharedInstance
  print("new device orientation from sharedInstance: " + MotionOrientation.sharedInstance().deviceOrientation);
}

MotionOrientationInterfaceOrientationChangedNotification, just when the interface orientation changed.

@objc private func interfaceOrientationDidChange(notification: NSNotification) {
  // You can get it from userInfo with key kMotionOrientationInterfaceOrientationKey
  if let userInfo = notification.userInfo,
     let rawValue = userInfo[kMotionOrientationInterfaceOrientationKey] as? NSNumber,
     let orientation = UIInterfaceOrientation(rawValue: rawValue.intValue) {
       print("new interface orientation from userInfo: " + orientation)
  }

  // or get it from sharedInstance
  print("new interface orientation from sharedInstance: " + MotionOrientation.sharedInstance().interfaceOrientation);
}

3. MotionOrientation.sharedInstance() always provides current orientations

private func printOrientations() {
  print("current device orientation: " + MotionOrientation.sharedInstance().deviceOrientation)
  print("current interface orientation: " + MotionOrientation.sharedInstance().interfaceOrientation)
}

Energe Consumption Optimization

Automatic stop and restart along the app life-cycle

1. will stop when the app enters background.
2. will restart when the app becomes active.

Manual stop and restart

You can manually stop or restart it to save energe in specific situations.

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    MotionOrientation.sharedInstance().start() // it's okay to call start repeatedly
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    MotionOrientation.sharedInstance().stop() // disables MotionOrientation until manually started
}

Low Energy Mode

Automatically

• turns on when ProcessInfo.processInfo.isLowPowerModeEnabled.
• turns on when ProcessInfo.processInfo.thermalState is NOT in (.nominal, .fair)

Manually

You can manually turn on of off the Low Energe Mode.

MotionOrientation.sharedInstance().setLowEnergeModeForcely(true)