我的代码无法编译。我究竟做错了什么?我还希望sf::Window
和sf::Input
对象是静态字段。什么是最好的方法呢?
#include <SFML/Window.hpp>
#include <SFML/Window/Event.hpp>
#ifndef WINDOW_INITIALIZER_H
#define WINDOW_INITIALIZER_H
class WindowInitializer
{
public:
WindowInitializer();
~WindowInitializer();
private:
void initialize_booleans(const sf::Window * const app);
bool m_leftKeyPressed;
bool m_rightKeyPressed;
bool m_upKeyPressed;
bool m_downKeyPressed;
unsigned int m_mouseX;
unsigned int m_mouseY;
};
#endif // WINDOWINITIALIZER_H
void WindowInitializer::initialize_booleans(const sf::Window* const app)
{
sf::Input input = app->GetInput();
this->m_downKeyPressed = input.IsKeyDown(sf::Key::Down);
this->m_leftKeyPressed = input.IsKeyDown(sf::Key::Left);
this->m_upKeyPressed = input.IsKeyDown(sf::Key::Up);
this->m_rightKeyPressed = input.IsKeyDown(sf::Key::Right);
this->m_mouseX = input.GetMouseX();
this->m_mouseY = input.GetMouseY();
}
WindowInitializer::WindowInitializer()
{
sf::Window app(sf::VideoMode(640, 480, 32), "SFML Tutorial");
initialize_booleans(&app);
sf::Event event;
while(app.IsOpened())
{
while(app.GetEvent(event))
{
if (event.Type == sf::Event::Closed)
app.Close();
if ((event.Type == sf::Event::KeyPressed) && (event.Key.Code == sf::Key::Escape))
app.Close();
if (m_downKeyPressed)
std::cout << "down key pressed!";
else if(m_leftKeyPressed)
std::cout << "left key pressed!";
else if(m_upKeyPressed)
std::cout << "up key pressed!";
else if(m_rightKeyPressed)
std::cout << "right key pressed!";
}
}
}
WindowInitializer::~WindowInitializer()
{
delete m_app;
}
我的错误如下:
In file included from /usr/include/SFML/Window.hpp:35:0,
from ../SFML_tutorial/window_initializer.cpp:3:
/usr/include/SFML/System/NonCopyable.hpp: In copy constructor ‘sf::Input::Input(const sf::Input&)’:
/usr/include/SFML/System/NonCopyable.hpp:57:5: error: ‘sf::NonCopyable::NonCopyable(const sf::NonCopyable&)’ is private
/usr/include/SFML/Window/Input.hpp:45:1: error: within this context
../SFML_tutorial/window_initializer.cpp: In member function ‘void WindowInitializer::initialize_booleans(const sf::Window*)’:
../SFML_tutorial/window_initializer.cpp:9:37: note: synthesized method ‘sf::Input::Input(const sf::Input&)’ first required here
../SFML_tutorial/window_initializer.cpp: In destructor ‘WindowInitializer::~WindowInitializer()’:
../SFML_tutorial/window_initializer.cpp:51:12: error: ‘m_app’ was not declared in this scope
答案 0 :(得分:3)
错误信息应该是明确的:
您无法复制sf::Input
。您需要使用参考。
sf::Input& input = app->GetInput();
您的析构函数正在删除不存在的对象。该变量从未被声明过。