为什么我不能使用QTcpSocket的write（）方法发送数据？

Question

I'm trying to learn Qt with the documentation alone, and it's kind of tough. I managed to get a simple command-line chat client working, but I don't know how to send things. It takes about 4 lines of intuitive code to read from a socket in Qt, but for some reason I can't say

QTcpSocket socket;
socket.connectToHost("google.com", 80);
socket.write("hey");
socket.flush();

flush(); returns false, but I don't see why.

I really don't understand why this doesn't work and would appreciate any help. Thanks!

Answer 1

调用connectToHost()您需要具有用于connected()的插槽处理程序，或调用waitForConnected()以等待与主机的连接完成，否则您的代码将在尝试建立连接之前通过尝试编写进行放大。