一、获取外网ip

• 首推方法1：此方法采用的淘宝网址，获取的到IP与百度IP是一样的

- (NSString *)deviceWANIPAddress {
    NSURL *ipURL = [NSURL URLWithString:@"http://ip.taobao.com/service/getIpInfo.php?ip=myip"];
    NSData *data = [NSData dataWithContentsOfURL:ipURL];
    
    NSDictionary *ipDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    NSString *ipStr = nil;
    if (ipDic && [ipDic[@"code"] integerValue] == 0) { //获取成功
        ipStr = ipDic[@"data"][@"ip"];
    }
    return (ipStr ? ipStr : @"");
}

返回数据

{
    code = 0;
    data =     {
        area = "";
        "area_id" = "";
        city = "\U4e0a\U6d77";
        "city_id" = 310100;
        country = "\U4e2d\U56fd";
        "country_id" = CN;
        county = XX;
        "county_id" = xx;
        ip = "61.152.71.206";
        isp = "\U7535\U4fe1";
        "isp_id" = 100017;
        region = "\U4e0a\U6d77";
        "region_id" = 310000;
    };
}

• 方法2：此方法访问的搜狐的获取ip接口

+ (NSString *)deviceWANIPAddress {
    NSError *error;
    NSURL *ipURL = [NSURL URLWithString:@"http://pv.sohu.com/cityjson?ie=utf-8"];
    
    NSMutableString *ip = [NSMutableString stringWithContentsOfURL:ipURL encoding:NSUTF8StringEncoding error:&error];
    //判断返回字符串是否为所需数据
    if ([ip hasPrefix:@"var returnCitySN = "]) {
        //对字符串进行处理，然后进行json解析
        //删除字符串多余字符串
        NSRange range = NSMakeRange(0, 19);
        [ip deleteCharactersInRange:range];
        NSString * nowIp =[ip substringToIndex:ip.length-1];
        //将字符串转换成二进制进行Json解析
        NSData * data = [nowIp dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary * dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
        NSLog(@"%@",dict);
        return dict[@"cip"] ? dict[@"cip"] : @"";
    }
    return @"";
}

接口返回

{
    cid = 310000;
    cip = "61.152.71.206";
    cname = "\U4e0a\U6d77\U5e02";
}

二、获取手机本地静态IP地址：（局域网）

#import <Foundation/Foundation.h>

@interface RequestIPAddress : NSObject
/*
 * 获取设备IP地址
 */
+ (NSString *)getIP;
@end

#import "RequestIPAddress.h"
#import "JCIPAddressConfig.h"
#define IOS_CELLULAR    @"pdp_ip0"
#define IOS_WIFI        @"en0"
#define IOS_VPN         @"utun0"
#define IP_ADDR_IPv4    @"ipv4"
#define IP_ADDR_IPv6    @"ipv6"


#pragma mark IPv4是32位地址长度
#pragma mark IPv6是128位地址长度
@implementation RequestIPAddress

/*
 * 获取设备IP地址
 */
+ (NSString *)getIP
{
    bool ret = [self isIpv6Net];
    
    NSArray *searchArray = ret ?
    
    @[ IOS_VPN @"/" IP_ADDR_IPv6,
       IOS_VPN @"/" IP_ADDR_IPv4,
       IOS_WIFI @"/" IP_ADDR_IPv6,
       IOS_WIFI @"/" IP_ADDR_IPv4,
       IOS_CELLULAR @"/" IP_ADDR_IPv6,
       IOS_CELLULAR @"/" IP_ADDR_IPv4 ]
    :
    @[ IOS_VPN @"/" IP_ADDR_IPv4,
        /*IOS_VPN @"/" IP_ADDR_IPv6, */
        IOS_WIFI @"/" IP_ADDR_IPv4,
        IOS_WIFI @"/" IP_ADDR_IPv6,
        IOS_CELLULAR @"/" IP_ADDR_IPv4,
        IOS_CELLULAR @"/" IP_ADDR_IPv6 ];
    
    NSDictionary *addresses = [self getIPAddresses];
    //NSLog(@"addresses: %@", addresses);
    
    __block NSString *address;
    [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)
     {
         address = addresses[key];
         if(address) *stop = YES;
     } ];
    
    
    return address ? address : @"0.0.0.0";
}

+ (NSDictionary *)getIPAddresses
{
    NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];
    // retrieve the current interfaces - returns 0 on success
    struct ifaddrs *interfaces;
    if(!getifaddrs(&interfaces)) {
        // Loop through linked list of interfaces
        struct ifaddrs *interface;
        for(interface=interfaces; interface; interface=interface->ifa_next) {
            if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {
                continue; // deeply nested code harder to read
            }
            const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;
            char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];
            if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {
                NSString *name = [NSString stringWithUTF8String:interface->ifa_name];
                NSString *type;
                if(addr->sin_family == AF_INET) {
                    if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv4;
                    }
                } else {
                    const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;
                    if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv6;
                    }
                }
                if(type) {
                    NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];
                    addresses[key] = [NSString stringWithUTF8String:addrBuf];
                }
            }
        }
        // Free memory
        freeifaddrs(interfaces);
    }
    return [addresses count] ? addresses : nil;
}



+ (BOOL)isIpv6Net{
    NSArray *searchArray =
    @[ IOS_VPN @"/" IP_ADDR_IPv6,
       IOS_VPN @"/" IP_ADDR_IPv4,
       IOS_WIFI @"/" IP_ADDR_IPv6,
       IOS_WIFI @"/" IP_ADDR_IPv4,
       IOS_CELLULAR @"/" IP_ADDR_IPv6,
       IOS_CELLULAR @"/" IP_ADDR_IPv4 ] ;
    NSDictionary *addresses = [self getIPAddresses];
    __block BOOL isIpv6 = NO;
    [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)
     {
         if ([key rangeOfString:@"ipv6"].length > 0  && ![[NSString stringWithFormat:@"%@",addresses[key]] hasPrefix:@"(null)"] ) {
             
             if ( ![addresses[key] hasPrefix:@"fe80"]) {
                 isIpv6 = YES;
             }
         }
     } ];
    return isIpv6;
}

@end