Question

所以，我想学习如何在objective-c中通过tcp套接字来回写入数据，而我似乎无法将其连接到我的服务器。我通过编写c代码来验证我的服务器是否正常运行，以便与服务器连接并且可以正常运行。我无法在objective-c中获得连接。

这是代码 -

- (void)searchForSite
    {

    CFReadStreamRef readStream;
    CFWriteStreamRef writeStream;
    CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)@"URL", PORT, &readStream, &writeStream);
    if(!CFWriteStreamOpen(writeStream)) {
        NSLog(@"Error, writeStream not open");

        return;
    }

    NSInputStream *inputStream = (__bridge_transfer NSInputStream *)readStream;
    NSOutputStream *outputStream = (__bridge_transfer NSOutputStream *)writeStream;
    [inputStream setDelegate:self];
    [outputStream setDelegate:self];
    [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    inStream = inputStream;
    outStream = outputStream;
    [inputStream open];
    [outputStream open];
    CFWriteStreamWrite(writeStream, "Hello\n", 6);
}

这个c代码可以工作，并在服务器端给我一个连接：

void con(NSString *x)
{
int sockfd, numbytes;
char buf[MAXDATASIZE];
char *node = "URL";
struct addrinfo hints, *servinfo, *p;
int rv;
char s[INET6_ADDRSTRLEN];
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if ((rv = getaddrinfo(node, PORT, &hints, &servinfo)) != 0) {
    fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));

}
// loop through all the results and connect to the first we can
for(p = servinfo; p != NULL; p = p->ai_next) {
    if ((sockfd = socket(p->ai_family, p->ai_socktype,
                         p->ai_protocol)) == -1) {
        perror("client: socket");
        continue; }
    if (connect(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
        close(sockfd);
        perror("client: connect");
        continue;
    }
    break; }
if (p == NULL) {
    fprintf(stderr, "client: failed to connect\n");

}
inet_ntop(p->ai_family, get_in_addr((struct sockaddr *)p->ai_addr),
          s, sizeof s);
printf("client: connecting to %s\n", s);
freeaddrinfo(servinfo); // all done with this structure
if ((numbytes = recv(sockfd, buf, MAXDATASIZE-1, 0)) == -1) {
    perror("recv");
    exit(1); }
buf[numbytes] = '\0';
printf("client: received '%s'\n",buf);
close(sockfd);

}

URL是ipv4地址。

有什么建议吗？

似乎无法让这个iOS tcp套接字工作

0 个答案: