选择了wifi蜂窝数据后调用

有权限后去调用

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
//...
self.networkStatus(application, didFinishLaunchingWithOptions: launchOptions)
//...
return true
}
func networkStatus(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) {
        if #available(iOS 9.0, *) {
            let cellularData = CTCellularData()
            cellularData.cellularDataRestrictionDidUpdateNotifier = { (state) in
                switch state {
                case .restrictedStateUnknown:
                    break
                    
                case .restricted:
                    break
                    
                case .notRestricted:
                    self.todo()
                    break
                }
            }
        }
        else {
            self.todo()
        }
    }