获取WIFI需要的头文件：
#import "GetCurrentIP.h"
#import <ifaddrs.h>
#import <arpa/inet.h>
#import <SystemConfiguration/CaptiveNetwork.h>
#include <netdb.h>
#include <net/if.h>
#import <dlfcn.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
获取所连wifi的IP的方法：
#pragma mark - 获取用户当前的IP地址
+ (nullable NSString*)getCurrentLocalIP
{
NSString *address = nil;
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;
// retrieve the current interfaces - returns 0 on success
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;
}
}
// Free memory
freeifaddrs(interfaces);
return address;
}
获取所连WIFI的详细信息：
+ (nullable NSString*)getCurrentWifiMessage {
NSString *address = nil;
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;
// retrieve the current interfaces - returns 0 on success
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"])
address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)];
// NSLog(@"子网掩码:%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)]);
// NSLog(@"本地IP:%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)]);
// NSLog(@"广播地址:%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)]);
}
temp_addr = temp_addr->ifa_next;
}
}
// Free memory
freeifaddrs(interfaces);
return address;
}
域名转换成IP：
#pragma mark - 域名转成IP的方法
+ (NSString *)queryIpWithDomain:(NSString *)domain
{
struct hostent *hs;
struct sockaddr_in server;
if ((hs = gethostbyname([domain UTF8String])) != NULL)
{
server.sin_addr = *((struct in_addr*)hs->h_addr_list[0]);
return [NSString stringWithUTF8String:inet_ntoa(server.sin_addr)];
}
return @"1";
}