0510 SWIFT WIFI 讀取

1. 使用方式:
建立 IfWifiList.swift 檔案
2.加入XCODE中
3.系統詢問是否要建立標頭黨 確認是
4.在新建立的標頭檔加入 #import "ifaddrs.h"
至此就可以編譯了

參考使用範例 呼叫程式

SWIFT 程式範例 (詳情參見wifiTest2 範例)
    @IBAction func btnGetIpPress(sender: UIButton) {
        //利用不同函數 驗證wifi指令
        var number = getAddressList(1) //取得現在ＩＰ列表
        number = getSSIDList2(number+1)  //取得現在SSID
        getSSIDList1(number+1)
   
    }

    // MARK: 呼叫範例程式
    // 傳入參數為列印位置高度
    func getAddressList(startIdx:Int)->Int{
        let wifiIPList=ifaddrsSwift.getIFAddresses()
        let wifiCount = CFArrayGetCount(wifiIPList)
        creatLabel(startIdx,showText: "wifi count \(wifiCount)")
        var count = startIdx
        for wifiIP in wifiIPList {
            count++;
            creatLabel(count,showText: wifiIP )
        }
        return count
    }
    func getSSIDList2(startIdx:Int) -> Int{
        let ssidList = ifaddrsSwift.getSSID()
        let wifiCount = ssidList.ssidCount
        let arrayList = ssidList.ssidList
        creatLabel(startIdx,showText: "SSID  count \(wifiCount)")
        var count=startIdx
        for wifiIP in arrayList {
            count++;
            creatLabel(count,showText: wifiIP)
        }
        return count
    }
    func getSSIDList1(startIdx:Int) -> Int{
     
        let ssidList = NEHotspotHelper.supportedNetworkInterfaces()
        let wifiCount = ssidList.count
        let arrayList = ssidList
        creatLabel(startIdx,showText: "supp count \(wifiCount)")
        var count=startIdx
        for wifiIP in arrayList {
            count++;
            creatLabel(count,showText: wifiIP as! String)
        }
        return count
    }

　//////////////////////////////////////////////////////////////////////
//
//  IfWifiList.swift
//  WifiTest2
//
//  Created by thai bob on 2015/12/23.
//  Copyright © 2015年 thai bob. All rights reserved.
//
//存放有關網路相關函數

import Foundation
import NetworkExtension //for NEHotspotHelper
import SystemConfiguration.CaptiveNetwork //CNCopySupportedInterfaces

// MARK: 網卡相關函數
public class ifaddrsSwift {
 
 
    //取得IP
    class func getIFAddresses() -> [String] {
     
        var addresses = [String]()
     
        // Get list of all interfaces on the local machine:
        var ifaddr : UnsafeMutablePointer<ifaddrs> = nil
        if getifaddrs(&ifaddr) == 0 {
         
            // For each interface ...
            for (var ptr = ifaddr; ptr != nil; ptr = ptr.memory.ifa_next) {
                let flags = Int32(ptr.memory.ifa_flags)
                var addr = ptr.memory.ifa_addr.memory
             
                // Check for running IPv4, IPv6 interfaces. Skip the loopback interface.
                if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {
                    if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
                     
                        // Convert interface address to a human readable string:
                        var hostname = [CChar](count: Int(NI_MAXHOST), repeatedValue: 0)
                        if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),
                            nil, socklen_t(0), NI_NUMERICHOST) == 0) {
                                if let address = String.fromCString(hostname) {
                                    addresses.append(address)
                                }
                        }
                    }
                }
            }
            freeifaddrs(ifaddr)
        }
     
        return addresses
    }
 
    //get ssid
    class func getSSID() -> (ssidCount:Int,ssidList:[String]) {
     
        var ssidStringList = [String]()
      //  var ssidList:CFArray?=nil
        var errorCode=0
        let ssidIfList = CNCopySupportedInterfaces()
        if ssidIfList == nil {
            errorCode = -1
        }else if CFArrayGetCount(ssidIfList) == 0{
            errorCode = -2
        }else{
            errorCode = CFArrayGetCount(ssidIfList)
            let totalCount = errorCode
         
            for i in 0..<totalCount{
                let interfaceName: UnsafePointer<Void> = CFArrayGetValueAtIndex(ssidIfList, i)
                let rec = unsafeBitCast(interfaceName, AnyObject.self)
                let unsafeInterfaceData = CNCopyCurrentNetworkInfo("\(rec)")
                if unsafeInterfaceData != nil {
                    let interfaceData = unsafeInterfaceData! as Dictionary!
                    let currentSSID = interfaceData["SSID"] as! String
                    ssidStringList.append(currentSSID)
                    print("\(i)=\(currentSSID)")
                }
                else {
                    errorCode--
                    //currentSSID = ""
                }
            }
        }
//        if bError != 0 {
//            currentSSID = "Error"
//        }
     
        return (errorCode,ssidStringList)
    }
 
    //get ssid
    class func getSSID2() -> (ssidCount:Int,ssidList:[String]) {
        var ssidList = [String]()
        var ssidCount = 0
        for newOne in NEHotspotHelper.supportedNetworkInterfaces(){
            ssidCount++
            ssidList.append(newOne.SSID)
        }
        return (ssidCount,ssidList)
    }
 
}





// MARK:可能可以取得ＳＳＩＤ的程式碼
Register your app as Hotspot helper.
#import <NetworkExtension/NetworkExtension.h>

NSArray * networkInterfaces = [NEHotspotHelper supportedNetworkInterfaces];
NSLog(@"Networks %@",networkInterfaces);
UPDATE (Sept. 11th)
The following Captive Network APIs have been re-enabled in the latest version of iOS 9 instead.
• CNCopySupportedInterfaces
• CNCopyCurrentNetworkInfo
UPDATE (Sept. 16th)
If you still prefer to use NetworkExtension and Apple gave you permission to add the entitlements, then you can do this to get the wifi information:
for(NEHotspotNetwork *hotspotNetwork in [NEHotspotHelper supportedNetworkInterfaces]) {
    NSString *ssid = hotspotNetwork.SSID;
    NSString *bssid = hotspotNetwork.BSSID;
    BOOL secure = hotspotNetwork.secure;
    BOOL autoJoined = hotspotNetwork.autoJoined;
    double signalStrength = hotspotNetwork.signalStrength;
}