您可以使用ASIHttpRequest,或者使用標準API NSURLConnection和NSMutableURLRequest。
可以使用提交POST NSMutableURLRequest:
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlEncoded]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60];
[urlRequest setHTTPMethod:@"POST"];
[urlRequest setHTTPBody:[ requestBody dataUsingEncoding:NSUTF8StringEncoding]];
....
theConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
我可以繼續下去,並提供一個完整的例子,但你應該看看蘋果例如
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/URLLoadingSystem/Tasks/UsingNSURLConnection.html