在iPhone中查找IP地址

我想在应用程序中找到IP地址.我能找到它.但是,问题是,它在iphone os 2.0左右工作.但是,在iphone os 3.0中它给了我一个警告:

warning: no '+currentHost' method found

warning: (Messages without a matching method signature)

我正在使用此代码,它与os 2.0版一起工作正常.

-(NSString*)getAddress {
char iphone_ip[255];
strcpy(iphone_ip,"127.0.0.1"); // if everything fails
NSHost* myhost = [NSHost currentHost];
if (myhost)
{
    NSString *ad = [myhost address];
    if (ad)
        strcpy(iphone_ip,[ad cStringUsingEncoding: NSISOLatin1StringEncoding]);
}
return [NSString stringWithFormat:@"%s",iphone_ip]; 

}

如何在iphone os 3.0或更高版本的os版本中找到IP地址？

提前致谢.

#include 
#include 
#include 
#include 

// retun the host name
+ (NSString *)hostname
{
    char baseHostName[256]; 
    int success = gethostname(baseHostName, 255);
    if (success != 0) return nil;
    baseHostName[255] = '\0';

#if !TARGET_IPHONE_SIMULATOR
    return [NSString stringWithFormat:@"%s.local", baseHostName];
#else
    return [NSString stringWithFormat:@"%s", baseHostName];
#endif
}

// return IP Address
+ (NSString *)localIPAddress
{
    struct hostent *host = gethostbyname([[self hostname] UTF8String]);
    if (!host) {herror("resolv"); return nil;}
    struct in_addr **list = (struct in_addr **)host->h_addr_list;
    return [NSString stringWithCString:inet_ntoa(*list[0]) encoding:NSUTF8StringEncoding];
}