iOS - 硬體設定相關 - 擷取WiFi的SSID(草稿)

- (id)fetchSSIDInfo{    NSString *currentSSID = @"";    CFArrayRef myArray = CNCopySupportedInterfaces();    if (myArray != nil){        NSDictionary* myDict = (__bridge NSDictionary *) CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0));        if (myDict!=nil){            currentSSID=[myDict valueForKey:@"SSID"];        } else {            currentSSID=@"<<NONE>>";        }    } else {        currentSSID=@"<<NONE>>";    }    NSArray *ifs = (__bridge id)CNCopySupportedInterfaces();    NSLog(@"%s: Supported interfaces: %@", __func__, ifs);    id info = nil;    for (NSString *ifnam in ifs) {        info = (__bridge id)CNCopyCurrentNetworkInfo((CFStringRef)CFBridgingRetain(ifnam));        if (info && [info count]) {            break;        }    }    return info;}