如何在setInterval中更改Variable的值

如何解决如何在setInterval中更改Variable的值

时间值在setInterval方法中仅更改一次 我想用checkLevel的值进行更改

var time = checkLevel（）;

// die Methode wird nach msecLevel aufgerufen

    setInterval(function (event) {
       
        time = checkLevel();
        if (!isLoser) {
            //Leere die Fläche
            ctx.clearRect(0,canvasWidth,canvasHeight);
            //Neu durchführen
            randomX = getRandomPosition(canvasWidth - fishSize);
            randomY = getRandomPosition(canvasHeight - fishSize);
            var randomFish = Math.floor(Math.random() * 11) + 1;
            fish.src = 'images/fish' + randomFish + '.png';

        }
    },time);

解决方法

您可以创建一个更改间隔的递归函数，然后只需调用一次间隔即可启动间隔，然后该函数将仅在每次调用时更改间隔。

var _timer;

    function showFish(){
           if (!isLoser) {
                //Leere die Fläche
                ctx.clearRect(0,canvasWidth,canvasHeight);
                //Neu durchführen
                randomX = getRandomPosition(canvasWidth - fishSize);
                randomY = getRandomPosition(canvasHeight - fishSize);
                var randomFish = Math.floor(Math.random() * 11) + 1;
                fish.src = 'images/fish' + randomFish + '.png';
           }

         _timer = setTimeout(showFish,checkLevel());
    }
    
     _timer = setTimeout(showFish,checkLevel());