24小时后删除Firebase儿童

Question

我想知道如果孩子的寿命超过24小时，你会如何自动删除Firebase Child。我保存数据的代码是：

@IBAction func Sturen(_ sender: Any) {
        let Extrainfo:String = self.Extrainformatie.text!
        let date = Date()
        let calendar = Calendar.current
        let hour = calendar.component(.hour, from: date)
        let minutes = calendar.component(.minute, from: date)
        let tijd = "\(hour) : \(minutes)"

        let random = Int(arc4random_uniform(99999))
        var randomstring = String(random)

        self.ref.child("Rollerbanken").child(randomstring).setValue(["Extra Informatie": Extrainfo, "TypeControle": TypeC, "Tijd": tijd, "Stad": Stad, "Latitude": lat, "Longitude": long])

        self.performSegue(withIdentifier: "Show map", sender: nil)

    }

有人知道怎么做吗？谢谢！