iOS Question GetBatteryLevel

[Filippo]

Hi,

with this function "GetBatteryLevel" of Erel you can query the battery status, the question is how should it be queried, with a timer or via a notification?
In case of notification, how to create this notification?

I found this code (here), but I do not know how to convert it to B4i.
Is anyone familiar with this?

override func viewDidLoad() {
    super.viewDidLoad()
    NotificationCenter.default.addObserver(self, selector: Selector(("batteryStateDidChange:")), name: NSNotification.Name.UIDeviceBatteryStateDidChange, object: nil)
    NotificationCenter.default.addObserver(self, selector: Selector(("batteryLevelDidChange:")), name: NSNotification.Name.UIDeviceBatteryLevelDidChange, object: nil)

    // Stuff...
}

func batteryStateDidChange(notification: NSNotification){
    // The stage did change: plugged, unplugged, full charge...
}

func batteryLevelDidChange(notification: NSNotification){
    
    let batteryLevel = UIDevice.current.batteryLevel
    if batteryLevel < 0.0 {
        print(" -1.0 means battery state is UIDeviceBatteryStateUnknown")
        return
    }
    
    print("Battery Level : \(batteryLevel * 100)%")
    // The battery's level did change (98%, 99%, ...)
}

 

[Filippo]

To query the battery status after a notification would be better, but if it is not possible, then I guess I have to use a timer. The solution is not elegant, but it works.

 

[Erel]

Use a timer (or a loop with Sleep) and check it every second. It won't affect the app performance.