问如何使用CaptiveNetwork获取可用的WiFi网络列表

EN

import UIKit
import Foundation
import SystemConfiguration.CaptiveNetwork

class FirstView: UIViewController
{
    @IBOutlet weak var label: UILabel!

    override func viewDidLoad()
    {
        super.viewDidLoad()
        let ssid = self.getWiFiName()
        print("SSID: \(ssid)")
    }

    func getWiFiName() -> String? {
        var ssid: String?
        if let interfaces = CNCopySupportedInterfaces() as NSArray? {
            for interface in interfaces {
                if let interfaceInfo = CNCopyCurrentNetworkInfo(interface as! CFString) as NSDictionary? {
                    ssid = interfaceInfo[kCNNetworkInfoKeySSID as String] as? String
                    break
                }
            }
        }
        return ssid
    }
}