本文将带你了解IOS开发入门iOS判断连接的是内网还是外网，希望本文对大家学IOS有所帮助。

ios判断自己连接的网络是内网还是外网
   //判断连接的服务器相对于本机为内网还是外网+(int)isInnerIP:(NSString  *)hostName{    BOOL bValid = false;    bool  _isInnerIp = false;    //NSString to  char*    const char *webSite = [hostName  cStringUsingEncoding:NSASCIIStringEncoding];    if  (webSite == NULL) {        return  -1;    }    // Get host entry info  for given host    struct hostent *remoteHostEnt =  gethostbyname(webSite);    if (remoteHostEnt == NULL) {        return  -1;    }    // Get address info from  host entry    struct in_addr *remoteInAddr = (struct  in_addr *) remoteHostEnt->h_addr_list[0];    if  (remoteInAddr == NULL)  {        return  -1;    }    // Convert numeric addr  to ASCII string    char *sRemoteInAddr = inet_ntoa(*remoteInAddr);    if  (sRemoteInAddr == NULL)  {        return  -1;    }    DebugLog(@"sRemoteInAddr:%s",  sRemoteInAddr);    unsigned int ipNum =  str2intIP(sRemoteInAddr);     unsigned int aBegin =  str2intIP("10.0.0.0");    unsigned int aEnd =  str2intIP("10.255.255.255");    unsigned int  bBegin = str2intIP("172.16.0.0");    unsigned  int bEnd =  str2intIP("172.31.255.255");    unsigned int  cBegin = str2intIP("192.168.0.0");    unsigned  int cEnd = str2intIP("192.168.255.255");    DebugLog(@"ipNum:%u",  ipNum);    _isInnerIp = IsInner(ipNum, aBegin, aEnd) ||  IsInner(ipNum, bBegin, bEnd) || IsInner(ipNum, cBegin,  cEnd);    if(_isInnerIp)  //( (a_ip>>24 ==  0xa) || (a_ip>>16 == 0xc0a8) || (a_ip>>22 == 0x2b0)  )    {        bValid  = 0;//内网    }else{        bValid  = 1;//外网    }    return  bValid;}unsigned int str2intIP(char* strip) //return int  ip{    unsigned int  intIP;    if(!(intIP = inet_addr(strip)))    {        perror("inet_addr  failed./n");        return  -1;    }    return  ntohl(intIP);} bool IsInner(unsigned int userIp, unsigned int begin,  unsigned int end){    return (userIp >= begin)  && (userIp <= end);}   

本文由职坐标整理并发布，希望对同学们有所帮助。了解更多详情请关注职坐标移动开发之IOS频道！