ios7获取mac地址

#import <SystemConfiguration/CaptiveNetwork.h>

- (NSString *)getMacAddress {
    NSArray *array = CFBridgingRelease(CNCopySupportedInterfaces());
    NSDictionary *info = nil;
    for (NSString *interface in array) {
        info = CFBridgingRelease(CNCopyCurrentNetworkInfo((CFStringRef)interface));
        if (info &&[info count]) {
            break;
        }
    }
    return info[@"BSSID"];
}