SDL window not showing? - c++

Question

I have this simple code for SDL.
#include <iostream>
#include <SDL2/SDL.h>
#include <SDL2_image/SDL_image.h>
using namespace std;
int main(int argc, char * argv[]){
if (SDL_Init(SDL_INIT_EVERYTHING) != 0){
return 1;
}
SDL_Window * win = SDL_CreateWindow("Window", 0, 0, 1920, 1080, SDL_WINDOW_FULLSCREEN_DESKTOP);
if(win == nullptr){
return 1;
}
SDL_Quit();
return 0;
}
None of this shows a window, I have error checked everything. It was working previously, but now it just opens and closes. I'm running on Xcode, if that helps.

Answer 1

Like the others state, your program terminates immediately so the window should "flash" momentarily. You can have the window appear for a few seconds by using SDL_Delay:
SDL_Window *win = SDL_CreateWindow("Hello World!", 100, 100, 640, 480, SDL_WINDOW_SHOWN);
if (win == nullptr){
std::cout << "SDL_CreateWindow Error: " << SDL_GetError() << std::endl;
SDL_Quit();
return 1;
}
SDL_Delay(2000);
SDL_DestroyWindow(win);
SDL_Quit();
And remember to call SDL_DestroyWindow.
A while(true) {} loop will just cause your program to freeze. You probably want something like the following so that it listens for events, and you can close the window at your leisure.
SDL_Event e;
bool quit = false;
while (!quit){
while (SDL_PollEvent(&e)){
if (e.type == SDL_QUIT){
quit = true;
}
if (e.type == SDL_KEYDOWN){
quit = true;
}
if (e.type == SDL_MOUSEBUTTONDOWN){
quit = true;
}
}
}