IOS中如何获取手机的当前IP

网上有许多类似的帖子、在搜索了资料以后、觉得下面的方法是最简单的、

使用的时候直接把类方法拖到自己新建的分类中就行、

.h文件

#import <Foundation/Foundation.h>

@interface NSObject (GetIP)

+ (NSString *)deviceIPAdress;

@end

.m文件

#import "NSObject+GetIP.h"

#include <ifaddrs.h>
#include <arpa/inet.h>

上面的两个头文件一定要导入

@implementation NSObject (GetIP)

+ (NSString *)deviceIPAdress {
NSString *address = @"an error occurred when obtaining ip address";
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;

success = getifaddrs(&interfaces);

if (success == 0) { // 0 表示获取成功

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);

//NSLog(@"手机的IP是：%@", address);

return address;
}

@end