iOS 12

Question

我有一个商业应用程序有完全合法的理由看到它所连接的网络的SSID：如果它连接到第三方硬件设备的Adhoc网络，它需要以不同于如果它连接到互联网。

我看到的关于获取SSID的所有内容都告诉我必须使用Apple80211，我理解这是一个私有库。我还读到，如果我使用私人图书馆，Apple将不会批准该应用程序。

我被困在苹果和硬地之间，还是我在这里缺少什么？

Answer 1

从iOS 7或8开始，你可以这样做，它利用了ARC和模块，它们将自动链接到所需的框架中：

@import SystemConfiguration.CaptiveNetwork;

/** Returns first non-empty SSID network info dictionary.
 *  @see CNCopyCurrentNetworkInfo */
- (NSDictionary *)fetchSSIDInfo
{
    NSArray *interfaceNames = CFBridgingRelease(CNCopySupportedInterfaces());
    NSLog(@"%s: Supported interfaces: %@", __func__, interfaceNames);

    NSDictionary *SSIDInfo;
    for (NSString *interfaceName in interfaceNames) {
        SSIDInfo = CFBridgingRelease(
            CNCopyCurrentNetworkInfo((__bridge CFStringRef)interfaceName));
        NSLog(@"%s: %@ => %@", __func__, interfaceName, SSIDInfo);

        BOOL isNotEmpty = (SSIDInfo.count > 0);
        if (isNotEmpty) {
            break;
        }
    }
    return SSIDInfo;
}

（这是为iOS 4.1+编写的代码示例的现代化。唯一的变化是引入更清晰的变量名称并采用ARC和模块。）

示例输出：

2011-03-04 15:32:00.669 ShowSSID[4857:307] -[ShowSSIDAppDelegate fetchSSIDInfo]: Supported interfaces: (
    en0
)
2011-03-04 15:32:00.693 ShowSSID[4857:307] -[ShowSSIDAppDelegate fetchSSIDInfo]: en0 => {
    BSSID = "ca:fe:ca:fe:ca:fe";
    SSID = XXXX;
    SSIDDATA = <01234567 01234567 01234567>;
}

请注意，模拟器上不支持ifs。在您的设备上进行测试。

在4.1之前，您可能会通过系统配置字典获得一些运气。例如，在我的Mac上使用scutil：

$ scutil
> show State:/Network/Interface/en1/AirPort
<dictionary> {
  Power Status : 1
  SecureIBSSEnabled : FALSE
  BSSID : <data> 0xcafecafecafe
  SSID_STR : XXXX
  SSID : <data> 0x012345670123456701234567
  Busy : FALSE
  CHANNEL : <dictionary> {
    CHANNEL : 1
    CHANNEL_FLAGS : 10
  }
}
> exit

iOS 12

您必须从功能启用访问wifi信息。

重要要在iOS 12及更高版本中使用此功能，请在Xcode中为您的应用启用Access WiFi信息功能。启用此功能后，Xcode会自动将Access WiFi信息权利添加到您的权利文件和应用程序ID中。 Documentation link

Swift 4.2

func getConnectedWifiInfo() -> [AnyHashable: Any]? {

    if let ifs = CFBridgingRetain( CNCopySupportedInterfaces()) as? [String],
        let ifName = ifs.first as CFString?,
        let info = CFBridgingRetain( CNCopyCurrentNetworkInfo((ifName))) as? [AnyHashable: Any] {

        return info
    }
    return nil

}

Answer 2

这是清理过的ARC版本，基于@ elsurudo的代码：

- (id)fetchSSIDInfo {
     NSArray *ifs = (__bridge_transfer NSArray *)CNCopySupportedInterfaces();
     NSLog(@"Supported interfaces: %@", ifs);
     NSDictionary *info;
     for (NSString *ifnam in ifs) {
         info = (__bridge_transfer NSDictionary *)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
         NSLog(@"%@ => %@", ifnam, info);
         if (info && [info count]) { break; }
     }
     return info;
}

Answer 3

iOS 10及更新版本

在iOS 10中不再弃用CNCopySupportedInterfaces。（API Reference）

您需要导入 SystemConfiguration / CaptiveNetwork.h 并将 SystemConfiguration.framework 添加到目标的链接库（在构建阶段）。

以下是swift (RikiRiocma's Answer)中的代码段：

import Foundation
import SystemConfiguration.CaptiveNetwork

public class SSID {
    class func fetchSSIDInfo() -> String {
        var currentSSID = ""
        if let interfaces = CNCopySupportedInterfaces() {
            for i in 0..<CFArrayGetCount(interfaces) {
                let interfaceName: UnsafePointer<Void> = CFArrayGetValueAtIndex(interfaces, i)
                let rec = unsafeBitCast(interfaceName, AnyObject.self)
                let unsafeInterfaceData = CNCopyCurrentNetworkInfo("\(rec)")
                if unsafeInterfaceData != nil {
                    let interfaceData = unsafeInterfaceData! as Dictionary!
                    currentSSID = interfaceData["SSID"] as! String
                }
            }
        }
        return currentSSID
    }
}

（重要： CNCopySupportedInterfaces在模拟器上返回nil。）

对于Objective-c，请参阅Esad's answer here and below

+ (NSString *)GetCurrentWifiHotSpotName {    
    NSString *wifiName = nil;
    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
    for (NSString *ifnam in ifs) {
        NSDictionary *info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
        if (info[@"SSID"]) {
            wifiName = info[@"SSID"];
        }
    }
    return wifiName;
}

iOS 9更新

自iOS 9起，Captive Network已被弃用*。（source）

*不再在iOS 10中弃用，请参阅上文。

建议您使用NEHotspotHelper（source）

您需要通过networkextension@apple.com向Apple发送电子邮件并申请权利。（source）

示例代码（Not my code. See Pablo A's answer）：

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;
}

旁注：是的，他们弃用了iOS 9中的CNCopySupportedInterfaces并改变了他们在iOS 10中的位置。我与一位Apple网络工程师进行了交谈，并且在很多人提交Radars并在Apple Developer论坛上谈到这个问题之后发生了逆转。。

Answer 4

这适用于我的设备（不是模拟器）。确保添加系统配置框架。

#import <SystemConfiguration/CaptiveNetwork.h>

+ (NSString *)currentWifiSSID {
    // Does not work on the simulator.
    NSString *ssid = nil;
    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
    for (NSString *ifnam in ifs) {
        NSDictionary *info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
        if (info[@"SSID"]) {
            ssid = info[@"SSID"];
        }
    }
    return ssid;
}

Answer 5

此代码可以很好地获取SSID。

#import <SystemConfiguration/CaptiveNetwork.h>

@implementation IODAppDelegate

@synthesize window = _window;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{


CFArrayRef myArray = CNCopySupportedInterfaces();
CFDictionaryRef myDict = CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0));
NSLog(@"Connected at:%@",myDict);
NSDictionary *myDictionary = (__bridge_transfer NSDictionary*)myDict;
NSString * BSSID = [myDictionary objectForKey:@"BSSID"];
NSLog(@"bssid is %@",BSSID);
// Override point for customization after application launch.
return YES;
}

这就是结果：

Connected at:{
BSSID = 0;
SSID = "Eqra'aOrange";
SSIDDATA = <45717261 27614f72 616e6765>;

}

Answer 6

如果您运行的是iOS 12，则需要执行额外的步骤。我一直在努力使此代码起作用，并最终在Apple网站上找到了它： “重要要在iOS 12及更高版本中使用此功能，请在Xcode中为您的应用启用访问WiFi信息功能。启用此功能后，Xcode会自动将Access WiFi Information授权添加到您的授权文件和App ID中。” https://developer.apple.com/documentation/systemconfiguration/1614126-cncopycurrentnetworkinfo

Answer 7

请参阅CaptiveNetwork中的CNCopyCurrentNetworkInfo：http://developer.apple.com/library/ios/#documentation/SystemConfiguration/Reference/CaptiveNetworkRef/Reference/reference.html。

Answer 8

这是短片＆amp;甜蜜的Swift版本。

请记住链接并导入框架：

import UIKit
import SystemConfiguration.CaptiveNetwork

定义方法：

func fetchSSIDInfo() -> CFDictionary? {
    if let
        ifs = CNCopySupportedInterfaces().takeUnretainedValue() as? [String],
        ifName = ifs.first,
        info = CNCopyCurrentNetworkInfo((ifName as CFStringRef))
    {
        return info.takeUnretainedValue()
    }
    return nil
}

在您需要时调用该方法：

if let
    ssidInfo = fetchSSIDInfo() as? [String:AnyObject],
    ssID = ssidInfo["SSID"] as? String
{
    println("SSID: \(ssID)")
} else {
    println("SSID not found")
}

如其他地方所述，这仅适用于您的iDevice。当不在WiFi上时，该方法将返回nil - 因此是可选的。

Answer 9

对于iOS 13

从iOS 13开始，您的应用还需要访问核心位置才能使用CNCopyCurrentNetworkInfo function，除非它配置了当前网络或具有VPN配置：

这就是您所需要的（请参见apple documentation）：
-链接CoreLocation.framework库
-在 Info.plist
中将location-services添加为UIRequiredDeviceCapabilities键/值 -在 Info.plist 中添加一个NSLocationWhenInUseUsageDescription键/值，说明您的应用为何需要“核心位置”
-为您的应用添加“访问WiFi信息”权利

现在以Objective-C为例，首先检查是否已接受位置访问，然后使用CNCopyCurrentNetworkInfo阅读网络信息：

- (void)fetchSSIDInfo {
    NSString *ssid = NSLocalizedString(@"not_found", nil);

    if (@available(iOS 13.0, *)) {
        if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {
            NSLog(@"User has explicitly denied authorization for this application, or location services are disabled in Settings.");
        } else {
            CLLocationManager* cllocation = [[CLLocationManager alloc] init];
            if(![CLLocationManager locationServicesEnabled] || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined){
                [cllocation requestWhenInUseAuthorization];
                usleep(500);
                return [self fetchSSIDInfo];
            }
        }
    }

    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
    id info = nil;
    for (NSString *ifnam in ifs) {
        info = (__bridge_transfer id)CNCopyCurrentNetworkInfo(
            (__bridge CFStringRef)ifnam);

        NSDictionary *infoDict = (NSDictionary *)info;
        for (NSString *key in infoDict.allKeys) {
            if ([key isEqualToString:@"SSID"]) {
                ssid = [infoDict objectForKey:key];
            }
        }
    }        
        ...
    ...
}

iPhone获得没有私人图书馆的SSID

9 个答案:

iOS 12

iOS 10及更新版本

iOS 9更新

对于iOS 13