iOS 获取当前设备连接wifi 名称和地址

#import 

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

en0 => {
    BSSID = "xx.xxx.xxx.xxxxx.xxxx.xx";
    SSID = "wifi名称";
    SSIDDATA = <其他数据>;
}

- (void)showWifiSsid
{
    BOOL wifiOK= FALSE;
    NSDictionary *ifs;
    NSString *ssid;
    UIAlertView *alert;
    if (!wifiOK)
    {
        ifs = [self fetchSSIDInfo];
        ssid = [ifs objectForKey:@"SSID"];
        if (ssid!= nil)
        {
            wifiOK= TRUE;
            self.txtSSID.text = ssid;
        }
        else
        {
            alert= [[UIAlertView alloc] initWithTitle:@"" message:[NSString stringWithFormat:@"请连接Wi-Fi"] delegate:self cancelButtonTitle:@"关闭" otherButtonTitles:nil];
            alert.delegate=self;
            [alert show];
        }
    }
}