SSID取得

gistfile1.m

@import SystemConfiguration;
#import <SystemConfiguration/CaptiveNetwork.h>

- (NSString *)currentSSID
{
    NSArray *interfaceNames = CFBridgingRelease(CNCopySupportedInterfaces());
    if (!interfaceNames.count) {
        return nil;
    }

    NSString *interfaceName = interfaceNames.firstObject;
    if (!interfaceName) {
        return nil;
    }

    NSDictionary *info = CFBridgingRelease(CNCopyCurrentNetworkInfo((__bridge CFStringRef)interfaceName));
    NSString *ssid = info[(__bridge NSString *)kCNNetworkInfoKeySSID];

    return ssid;
}