c++ - 在类中重新初始化 asio::socket

Question

我发现，如果我想boost::socket用作类成员，我必须使用初始化列表来定义它，并且必须在构造函数调度之前定义它。
这意味着，我必须用一些虚拟参数证明它的构造函数，当我有我需要的数据时，我需要再次重新初始化它。

客户端.hpp

class SocketClient {
    private:
       int port; //Port, currently unused
       boost::asio::io_service io_service;  //This is my "dummy" parameter
       boost::asio::ip::tcp::resolver::iterator endpoint_iterator;
       boost::asio::ip::tcp::socket sock; //Socket class instance
     
    public:
       void init(const char*, const char* );
       SocketClient::SocketClient():sock(io_service){};  //Giving empty "io_service" to  the "sock"
       bool read(int bytes, char *text);
       bool send(int length, char *text);
       bool send(std::string text);
       unsigned int timeout;
};

稍后，当init()调用方法时，我需要提供sockwith initialized io_service。我不知道该怎么做：

客户端.h

void SocketClient::init(const char* ip_a, const char* port_a) {
    boost::asio::ip::tcp::resolver resolver(io_service);
    boost::asio::ip::tcp::resolver::query query(ip_a, port_a);
    boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
    //Error (unsuported operator =):
    sock=boost::asio::ip::tcp::socket(io_service);
    //Error (term does not evaluate to a function taking 1 arguments):
    sock(io_service);
}

在这里您可以看到整个项目，没有任何内容被删除。

Answer 1

You already have the sokect initialized , now only need to connect

tcp::resolver resolver(io_service);
tcp::resolver::query query(tcp::v4(), ip_a,port_a);
tcp::resolver::iterator iterator = resolver.resolve(query);
sock.connect(*iterator);