QWidget *t_newWidget = new QWidget(NULL);
t_newWidget->resize(300,400);
t_newWidget->show();
NSView * view = (NSView *) t_newWidget->winId();
NSWindow * nsWin = [view window];
SDL_Init(SDL_INIT_VIDEO);
SDL_Window* window = SDL_CreateWindowFrom((void*)nsWin);
            //SDL_CreateWindow("test windows", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,500, 200,SDL_WINDOW_SHOWN);;
            //SDL_CreateWindowFrom((void*)t_newWidget->winId());
SDL_Renderer* render = SDL_CreateRenderer(window, -1, SDL_RENDERER_SOFTWARE);
SDL_SetRenderDrawColor(render, 255, 0, 0, 255);
SDL_RenderFillRect(render, NULL);
SDL_RenderPResent(render);
pro中添加：
LIBS += -framework Foundation
.mm中添加：
#import <cocoa/cocoa.h>
記得文件后綴要由：.cpp 改為 .mm