使用删除函数‘sf::RenderWindow&sf::RenderWindow::operator=(const sf::RenderWindow&)’

问题描述

我对 C++ 还很陌生，所以请放轻松.

I'm pretty new to C++ so please go easy on me.

我正在尝试使用 sfml 创建一个 RenderWindow.然后，在创建播放器时，该播放器的关联窗口"对象被设置为之前创建的 RenderWindow.我的目的是能够从播放器对象运行窗口方法，例如 window.draw()，即:

I'm trying to use sfml to create a RenderWindow. Then, on creation of a player, that player's associated "window" object gets set to the RenderWindow created previously. My purpose is to be able to run window methods, such as window.draw(), from the player object, i.e.:

player::drawSprite() {
    window.draw(sprite);
}

但是，我遇到了错误:

error: use of deleted function ‘sf::RenderWindow& sf::RenderWindow::operator=(const sf::RenderWindow&)’
         window = win;
                ^

在错误日志的进一步下方，我还看到:

Further down in the error log, I also see:

error:   initializing argument 1 of ‘Player::Player(sf::RenderWindow)’
     Player(sf::RenderWindow win)
     ^

我的代码(省略了与问题无关的任何内容)如下:

My code (with anything not pertinent to the question omitted) is as follows:

#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include <cstring>
#include <cstdlib>
#include <iostream>

class Player
{
private:
    float x;
    float y;
    float speed;
    sf::RenderWindow window;
public:
    Player(sf::RenderWindow win)
    {
        x = 640;
        y = 360;
        speed = 5;
        window = win;
    }
};

int main()
{
    //Window Initialization
    sf::RenderWindow window(sf::VideoMode(800, 600), "My window");

    //Player Creation
    Player player(window);
}

我相信这个问题可能与 const 的、引用等有关，但我对 C++ 不够熟悉，无法轻松识别它.我该如何解决这个问题?

I believe the problem may have something to do with const's, references, or the like, but I am not familiar enough with C++ to easily identify it. How can I remedy this issue?

推荐答案

你应该使用引用或指向 window 对象的指针，因为我不认为你会希望每个玩家都有自己的窗口.

You should use reference or pointer to window object as I don't think that you will want each player to have its own window.

因此您的播放器应如下所示:

Thus your Player should look like:

class Player
{
private:
    float x;
    float y;
    float speed;
    sf::RenderWindow& window;     // reference
public:
    Player(sf::RenderWindow& win) // accepts reference
      : window(win)               // stores reference
    {
        x = 640;
        y = 360;
        speed = 5;
        // window = win;
    }
};

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