iOS开发--获取wifi名字,判断是否连接了VPN

+ (NSString *)wiFiName
{
NSArray *wiFiName = CFBridgingRelease(CNCopySupportedInterfaces());
id info1 = nil;
for (NSString *wfName in wiFiName) {
    info1 = (__bridge_transfer id)CNCopyCurrentNetworkInfo((CFStringRef) wfName);
        if (info1 && [info1 count]) {
            break;
        }
    }
    NSDictionary *dic = (NSDictionary *)info1;

    NSString *ssidName = [[dic objectForKey:@"SSID"] lowercaseString];

    return ssidName;
}
+ (BOOL)isVPNOn
{
   BOOL flag = NO;
   NSString *version = [UIDevice currentDevice].systemVersion;
   // need two ways to judge this.
   if (version.doubleValue >= 9.0)
   {
   NSDictionary *dict = CFBridgingRelease(CFNetworkCopySystemProxySettings());
   NSArray *keys = [dict[@"__SCOPED__"] allKeys];
   for (NSString *key in keys) {
       if ([key rangeOfString:@"tap"].location != NSNotFound ||
           [key rangeOfString:@"tun"].location != NSNotFound ||
           [key rangeOfString:@"ipsec"].location != NSNotFound ||
           [key rangeOfString:@"ppp"].location != NSNotFound){
           flag = YES;
           break;
       }
   }
   }

   return flag;
}