IOS 13 Get Wifi and Cellular Network Signal Strength

Question

I have tried all the possible way of getting the wifi and cellular network signal strength.

    func getSignalStrength() -> Int {
        let application = UIApplication.shared
       //let statusBarView = application.value(forKey: "statusBar") as! UIView
        let statusBarView = UIApplication.shared.statusBarUIView
        let foregroundView = statusBarView?.value(forKey: "foregroundView") as! UIView
        let foregroundViewSubviews = foregroundView.subviews

        var dataNetworkItemView:UIView!

        for subview in foregroundViewSubviews {
            if subview.isKind(of: NSClassFromString("UIStatusBarSignalStrengthItemView")!) {
                dataNetworkItemView = subview
                print("NONE")
                break
            } else {
                print("NONE")

                return 0 //NO SERVICE
            }
        }

        return dataNetworkItemView.value(forKey: "signalStrengthBars") as! Int
    }

    private func wifiStrength() -> Int? {
        let app = UIApplication.shared
        var rssi: Int?
        guard let statusBar = app.value(forKey: "statusBar") as? UIView, let foregroundView = statusBar.value(forKey: "foregroundView") as? UIView else {
            return rssi
        }
        for view in foregroundView.subviews {
            if let statusBarDataNetworkItemView = NSClassFromString("UIStatusBarDataNetworkItemView"), view .isKind(of: statusBarDataNetworkItemView) {
                if let val = view.value(forKey: "wifiStrengthRaw") as? Int {
                    //print("rssi: \(val)")

                    rssi = val
                    break
                }
            }
        }
        return rssi
    }


extension UIApplication {
var statusBarUIView: UIView? {

    if #available(iOS 13.0, *) {
        let tag = 38482458

        let keyWindow = UIApplication.shared.connectedScenes
            .map({$0 as? UIWindowScene})
            .compactMap({$0})
            .first?.windows.first

        if let statusBar = keyWindow?.viewWithTag(tag) {
            return statusBar
        } else {

            let statusBarView = UIView(frame: (keyWindow?.windowScene?.statusBarManager!.statusBarFrame)!)
            statusBarView.tag = tag
            statusBarView.layer.zPosition = 999999

            keyWindow?.addSubview(statusBarView)
            return statusBarView
        }

    } else {

        if responds(to: Selector(("statusBar"))) {
            return value(forKey: "statusBar") as? UIView
        }
    }
    return nil
  }
}

the code crashed at application.value(forKey: "statusBar") so I tried the extension but now it crashed at statusBarView?.value(forKey: "foregroundView"), no key pair value for foregroundView. Is there a better to get wifi or cellular signal?

Answer 1

if #available(iOS 13.0, *) {
        if let statusBarManager = UIApplication.shared.keyWindow?.windowScene?.statusBarManager,
            let localStatusBar = statusBarManager.value(forKey: "createLocalStatusBar") as? NSObject,
            let statusBar = localStatusBar.value(forKey: "statusBar") as? NSObject,
            let _statusBar = statusBar.value(forKey: "_statusBar") as? UIView,
            let currentData = _statusBar.value(forKey: "currentData")  as? NSObject,
            let celluar = currentData.value(forKey: "cellularEntry") as? NSObject,
            let signalStrength = celluar.value(forKey: "displayValue") as? Int {
            return signalStrength
        } else {
            return nil
        }
    } else {
        var signalStrength = -1
        let application = UIApplication.shared
        let statusBarView = application.value(forKey: "statusBar") as! UIView
        let foregroundView = statusBarView.value(forKey: "foregroundView") as! UIView
        let foregroundViewSubviews = foregroundView.subviews
        var dataNetworkItemView: UIView!
        for subview in foregroundViewSubviews {
            if subview.isKind(of: NSClassFromString("UIStatusBarSignalStrengthItemView")!) {
                dataNetworkItemView = subview
                break
            } else {
                signalStrength = -1
            }
        }
        signalStrength = dataNetworkItemView.value(forKey: "signalStrengthBars") as! Int
        if signalStrength == -1 {
            return nil
        } else {
            return signalStrength
        }
    }
    return nil