使用NSHost访问IP地址

Question

我正在尝试使用IP地址NSHost.使用该NSHost对象,我可以使用addresses方法访问对象数组,其中一个对象是IP地址.我担心IP地址可能会改变阵列中从一台机器到另一台机器的位置.有没有办法以通用的方式访问这些信息？

试图在之前的帖子中回答这个问题,但是你可以看到它不足.

IP地址？- 可可

这是我的代码:

+(NSString *) ipAddress {
    NSHost * h = [[[NSHost currentHost] addresses] objectAtIndex:1];
    return h ;  
}

Answer 1

我唯一能想到的是使用类似" http://www.dyndns.org/cgi-bin/check_ip.cgi "的东西,其他人可能会有更好的方法.

这是一个例子,(即快速拼凑的代码)

NSUInteger  an_Integer;
NSArray * ipItemsArray;
NSString *externalIP;

NSURL *iPURL = [NSURL URLWithString:@"http://www.dyndns.org/cgi-bin/check_ip.cgi"];

if (iPURL) {
    NSError *error = nil;
    NSString *theIpHtml = [NSString stringWithContentsOfURL:iPURL 
                                                  encoding:NSUTF8StringEncoding 
                                                     error:&error];
    if (!error) {
                NSScanner *theScanner;
        NSString *text = nil;

        theScanner = [NSScanner scannerWithString:theIpHtml];

        while ([theScanner isAtEnd] == NO) {

                // find start of tag
            [theScanner scanUpToString:@"<" intoString:NULL] ; 

                // find end of tag
            [theScanner scanUpToString:@">" intoString:&text] ;

                // replace the found tag with a space
                //(you can filter multi-spaces out later if you wish)
            theIpHtml = [theIpHtml stringByReplacingOccurrencesOfString:
                    [ NSString stringWithFormat:@"%@>", text]
                                                   withString:@" "] ;
            ipItemsArray =[theIpHtml  componentsSeparatedByString:@" "];
            an_Integer=[ipItemsArray indexOfObject:@"Address:"];

                externalIP =[ipItemsArray objectAtIndex:  ++an_Integer];



        } 


            NSLog(@"%@",externalIP);
    } else {
        NSLog(@"Oops... g %d, %@", 
              [error code], 
              [error localizedDescription]);
    }
}




[pool drain];
return 0;}

Answer 2

我已经在许多机器上使用它而没有任何问题.

 -(void) getIPWithNSHost{
    NSArray *addresses = [[NSHost currentHost] addresses];

for (NSString *anAddress in addresses) {
    if (![anAddress hasPrefix:@"127"] && [[anAddress componentsSeparatedByString:@"."] count] == 4) {
         stringAddress = anAddress;
        break;
    } else {
        stringAddress = @"IPv4 address not available" ;
    }
}
        //NSLog (@"getIPWithNSHost: stringAddress = %@ ",stringAddress);    

}

NSString*stringAddress; 在其他地方宣布