C ++ SDL2窗口未打开答案

【问题标题】：C++ SDL2 window not openingC ++ SDL2窗口未打开
【发布时间】：2021-06-09 22:40:19
【问题描述】：

我写了这个。

#include <iostream>
#include "SDL.h"

int main(int argc , char** args)
{
    SDL_Init(SDL_INIT_EVERYTHING);

    SDL_Window* win = SDL_CreateWindow("my window", 100, 100, 640, 480, SDL_WINDOW_SHOWN);

if (!win) 
{
    std :: cout << "Failed to create a window! Error: " << SDL_GetError() << "\n";

}


SDL_Surface* winSurface = SDL_GetWindowSurface(win);



SDL_UpdateWindowSurface(win);

SDL_FillRect(winSurface, NULL, SDL_MapRGB(winSurface->format, 255, 90, 120));

SDL_DestroyWindow(win);
win = NULL;
winSurface = NULL;

return 0;




}

当我编译它时，它会打开窗口，然后立即关闭。但控制台没有。这是我的控制台的屏幕截图（也许它可以帮助解决问题？）

有没有办法让窗口不关闭？

【问题讨论】：

首先，您的SDL_Renderer* 在哪里？如果是SDL2，为什么不用渲染器和SDL_RenderPresent()？

标签： c++ visual-c++ sdl-2

【解决方案1】：

有没有办法让窗口不关闭？

启动一个事件处理循环并处理一些事件：

// g++ main.cpp `pkg-config --cflags --libs sdl2`
#include <SDL.h>
#include <iostream>

int main( int argc, char** argv )
{
    SDL_Init(SDL_INIT_EVERYTHING);
    SDL_Window* win = SDL_CreateWindow("my window", 100, 100, 640, 480, SDL_WINDOW_SHOWN);

    if (!win)
    {
        std :: cout << "Failed to create a window! Error: " << SDL_GetError() << "\n";
    }

    SDL_Surface* winSurface = SDL_GetWindowSurface(win);

    bool running = true;
    while( running )
    {
        SDL_Event ev;
        while( SDL_PollEvent( &ev ) )
        {
            if( ( SDL_QUIT == ev.type ) ||
                ( SDL_KEYDOWN == ev.type && SDL_SCANCODE_ESCAPE == ev.key.keysym.scancode ) )
            {
                running = false;
                break;
            }
        }

        SDL_FillRect(winSurface, NULL, SDL_MapRGB(winSurface->format, 255, 90, 120));
        SDL_UpdateWindowSurface(win);
    }

    SDL_DestroyWindow(win);
    SDL_Quit();
    return 0;
}

【讨论】：