swift4.1 获取当前连接的wifi名

func getCurrentWifiName() -> String? {
        var wifiName : String = ""
        let wifiInterfaces = CNCopySupportedInterfaces()
        if wifiInterfaces == nil {
            return nil
        }
        
        let interfaceArr = CFBridgingRetain(wifiInterfaces!) as! Array<String>
        if interfaceArr.count > 0 {
            let interfaceName = interfaceArr[0] as CFString
            let ussafeInterfaceData = CNCopyCurrentNetworkInfo(interfaceName)
            
            if (ussafeInterfaceData != nil) {
                let interfaceData = ussafeInterfaceData as! Dictionary<String, Any>
                wifiName = interfaceData["SSID"]! as! String
            }
        }
        
        return wifiName
    }

附上OC版本

//获取当前wifi名字
- (NSString *)getCurrentConnectWifiName
{
    NSString *wifiName = nil;
    
    CFArrayRef wifiInterfaces = CNCopySupportedInterfaces();
    
    if (!wifiInterfaces) {
        return nil;
    }
    
    NSArray *interfaces = (__bridge NSArray *)wifiInterfaces;
    
    for (NSString *interfaceName in interfaces) {
        CFDictionaryRef dictRef = CNCopyCurrentNetworkInfo((__bridge CFStringRef)(interfaceName));
        
        if (dictRef) {
            NSDictionary *networkInfo = (__bridge NSDictionary *)dictRef;
            NSLog(@"network info -> %@", networkInfo);
            wifiName = [networkInfo objectForKey:(__bridge NSString *)kCNNetworkInfoKeySSID];
            
            CFRelease(dictRef);
        }
    }
    
    CFRelease(wifiInterfaces);
    return wifiName;
}