iOS 获取手机IP

引入头文件
#include <ifaddrs.h>
#include <arpa/inet.h>
- (NSString *)getIPAddress {        NSString *address = @"error";    struct ifaddrs *interfaces = NULL;    struct ifaddrs *temp_addr = NULL;    int success = 0;    success = getifaddrs(&interfaces);    if (success == 0) {        // Loop through linked list of interfaces        temp_addr = interfaces;        while (temp_addr != NULL) {            if( temp_addr->ifa_addr->sa_family == AF_INET) {                // Check if interface is en0 which is the wifi connection on the iPhone                if ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {                    // Get NSString from C String                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];                }            }                        temp_addr = temp_addr->ifa_next;        }    }        freeifaddrs(interfaces);        return address; }