Timer - App background support

Timer+Background.swift

import Foundation

extension Timer {
    
    static func scheduleTimerEnablingBackground(timeInterval: TimeInterval, target: Any,
                                         selector: Selector, userInfo: Any?,
                                         repeats: Bool) -> Timer {
        //  Enable background expiration
        UIApplication.shared.beginBackgroundTask(expirationHandler: nil)
        let timer = Timer.scheduledTimer(timeInterval: timeInterval,
                                         target: target,
                                         selector:selector,
                                         userInfo: userInfo,
                                         repeats: repeats)
        return timer
    }
}