获取wifi ipv4.m

NSString* getLocalIP() { // 获取wifi ipv4
    NSString* result = nil;
    struct ifaddrs* interfaces = 0;
    struct ifaddrs* temp_addr = 0;
    if (0 == getifaddrs(&interfaces)) {
        temp_addr = interfaces;
        while(temp_addr != NULL) {
            if(temp_addr->ifa_addr->sa_family == AF_INET) {
                if(!strcmp(temp_addr->ifa_name, "en0")) {
                    char* ip = inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr);
                    result = @(ip);
                    break;
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
        freeifaddrs(interfaces);
    }
    return result;
}