要获取设备的IP地址,网上随便一搜就能找到一大堆结果,但是这些能找到的代码基本上都是用C写的,并没有针对iOS做过优化调整,使用起来也不方便。就只是要获取IP地址而已,封装成一个函数调用一下然后使用起来才方便。代码比较简单,就是把网上抄来的代码做了整理和iOS适配。函数返回一个包含了所有网卡的IP地址的一个数组。
代码如下 | 复制代码 |
- (NSArray *)getIpAddresses { int sockfd = socket(AF_INET, SOCK_DGRAM, 0); if (sockfd < 0) return nil; NSMutableArray *ips = [NSMutableArray array]; int BUFFERSIZE = 4096; struct ifconf ifc; char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr; struct ifreq *ifr, ifrcopy; ifc.ifc_len = BUFFERSIZE; ifc.ifc_buf = buffer; if (ioctl(sockfd, SIOCGIFCONF, &ifc) >= 0){ for (ptr = buffer; ptr < buffer + ifc.ifc_len; ){ ifr = (struct ifreq *)ptr; int len = sizeof(struct sockaddr); if (ifr->ifr_addr.sa_len > len) { len = ifr->ifr_addr.sa_len; } ptr += sizeof(ifr->ifr_name) + len; if (ifr->ifr_addr.sa_family != AF_INET) continue; if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL) *cptr = 0; if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0) continue; memcpy(lastname, ifr->ifr_name, IFNAMSIZ); ifrcopy = *ifr; ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy); if ((ifrcopy.ifr_flags & IFF_UP) == 0) continue; NSString *ip = [NSString stringWithFormat:@"%s", inet_ntoa(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr)]; [ips addObject:ip]; } } close(sockfd); return ips; } |
文件头部需要加上这些import
代码如下 | 复制代码 |
#import <sys/socket.h> #import <sys/sockio.h> #import <sys/ioctl.h> #import <net/if.h> #import <arpa/inet.h> |
第二种方法是可以获取公网ip
代码如下 | 复制代码 |
- (void)getCurrentIP { NSURL *url = [NSURL URLWithString:@"http://automation.whatismyip.com/n09230945.asp"]; __block ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request setCompletionBlock:^{ NSString *responseString = [request responseString]; if (responseString) { NSString *ip = [NSString stringWithFormat:@"%@", responseString]; NSLog(@"responseString = %@", ip); }; }]; [request setFailedBlock:^{ }]; } |
用到了ASIHTTPRequest这个网络开源库。
时间: 2024-10-26 19:29:21