我可以从 iPhone 应用程序发出 POST 或 GET 请求吗？

有没有办法使用 iPhone SDK 获得与 HTTP POST 或 GET 方法相同的结果？

假设你的班级有一个responseData实例变量，则：

responseData = [[NSMutableData data] retain];

NSURLRequest *request =
    [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.domain.com/path"]];
[[NSURLConnection alloc] initWithRequest:request delegate:self];

然后将以下方法添加到您的类中：

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    [responseData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [responseData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    // Show error
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // Once this method is invoked, "responseData" contains the complete result
}

这将发送一个 GET。当调用最终方法时，responseData将包含整个 HTTP 响应（使用 [[NSString alloc] initWithData:encoding:] 转换为字符串。

或者，对于 POST，将第一块代码替换为：

NSMutableURLRequest *request =
        [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.domain.com/path"]];
[request setHTTPMethod:@"POST"];

NSString *postString = @"Some post string";
[request setHTTPBody:[postString dataUsingEncoding:NSUTF8StringEncoding]];