SDL: Window freezes

问题

I wanted to start working on SDL. I got a sample code to see if it worked fine. When compiling I get no errors, but when I run it the window shows up but the program freezes until the delay time is over. I'm new to this so I would really appreciate some help.

int main(int argc, char* argv[]) {

SDL_Init(SDL_INIT_EVERYTHING);

SDL_Window *window = 0;

window = SDL_CreateWindow("Hello World!",
        SDL_WINDOWPOS_CENTERED,
        SDL_WINDOWPOS_CENTERED,
        640, 480,
        SDL_WINDOW_SHOWN);

SDL_Delay(10000);

SDL_DestroyWindow(window);
SDL_Quit();

return 0;

}

回答1:

As mentioned by @HolyBlackCat, you need an event loop : https://wiki.libsdl.org/SDL_PollEvent

It should look something like this :

while (true) {
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
        /* handle your event here */
    }
    /* do some other stuff here -- draw your app, etc. */
}

Edit
You will need to replace your delay with the event loop. Instead, you can close the application on an event. The least you can/should do, is handle the SDL_QUIT event, which is sent when the user try to close the window:

while (!quit) {
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
        /* handle your event here */

       //User requests quit
        if( event.type == SDL_QUIT )
            quit = true;
    }
    /* do some other stuff here -- draw your app, etc. */
}

来源：https://stackoverflow.com/questions/48226816/sdl-window-freezes