无法停止 requestAnimationFrame (Javascript/html5: canvas)

Question

我在退出/杀死/退出我的 requestAnimationFrame 时遇到问题。我的游戏循环工作，我可以暂停我的游戏（游戏循环保持活跃）。但是当我想返回我的菜单时，我想杀死 requestAnimationFrame，所以它停止绘制和更新。我在互联网和stackoverflow上搜索过，发现类似的问题尝试了响应，但没有运气:(

var fps = 60;
var now;
var then = Date.now();
var interval = 1000/fps;
var delta;  

//============================================================================

function gameloop(){
window.requestAnimationFrame(gameloop);

if (game.isUnpaused()){
//game is not paused, update all
      now = Date.now();
          delta = now - then;

              if (delta > interval) {
                  then = now - (delta % interval);
              //DO ALL WHAT'S NEEDED: draw avatar,move obstacles,move avatar....
                  }}

//what to do when game is paused:
else{//draw stuff when game is paused}

}

有人可以帮帮我吗？

提前致谢

Answer 1

var active = true;
function gameloop(){
    if(active){
        window.requestAnimationFrame(gameloop);
        }
    }