在WPF应用程序中运行WCF侦听器(Running a WCF listener in a WPF application)

 clearInterval不接受第二个参数。 
 
 并且setTimeout更容易包裹...一个简单的方法是计算到目前为止你创建了多少敌人，并且在达到限制时不运行setTimeout ： 
 
var initEnemies = function () {

    var numEnemiesCreated = 0;

    function createAnotherEnemy() {
        var randomX = Math.floor(Math.random() * 190);
        var randomY = Math.floor(Math.random() * 50);
        enemy.push(new Enemy(randomX, randomY).create());

        numEnemiesCreated += 1;
        if (numEnemiesCreated < 10)
            setTimeout(createAnotherEnemy, 1000);

    }

    createAnotherEnemy();
}
 
 还有一个带有for循环的版本，它从现在起调度函数调用0s，1s，2s，...，9s： 
 
var initEnemies = function () {

    function createEnemy() {
        var randomX = Math.floor(Math.random() * 190);
        var randomY = Math.floor(Math.random() * 50);
        enemy.push(new Enemy(randomX, randomY).create());
    }


    for (var i=0; i < 10; i++)
        setTimeout(createEnemy, i * 1000);
}
 
 更新 
 
 这是一个带有setInterval和clearInterval的版本。 您仍需要计算到目前为止已创建的敌人数量，并且必须在clearInterval调用中使用间隔ID。 没试过这个，对不起！ 
 
var initEnemies = function () {
    var numEnemiesCreated = 0;
    var intervalId;

    function createEnemy() {
        var randomX = Math.floor(Math.random() * 190);
        var randomY = Math.floor(Math.random() * 50);
        enemy.push(new Enemy(randomX, randomY).create());

        // Unschedule ourselves after 10th run
        numEnemiesCreated += 1;
        if (numEnemiesCreated == 10)
            clearInterval(intervalId);    
    }


    intervalId = setInterval(createEnemy, 1000);
}

clearInterval doesn't take second argument.
 
And setTimeout is easier to wrap head around... A simple approach is to count how many enemies you've created so far and not run setTimeout when the limit is reached:
 
var initEnemies = function () {

    var numEnemiesCreated = 0;

    function createAnotherEnemy() {
        var randomX = Math.floor(Math.random() * 190);
        var randomY = Math.floor(Math.random() * 50);
        enemy.push(new Enemy(randomX, randomY).create());

        numEnemiesCreated += 1;
        if (numEnemiesCreated < 10)
            setTimeout(createAnotherEnemy, 1000);

    }

    createAnotherEnemy();
}
 
And a version with for loop, it schedules function calls 0s, 1s, 2s, ... , 9s from now:
 
var initEnemies = function () {

    function createEnemy() {
        var randomX = Math.floor(Math.random() * 190);
        var randomY = Math.floor(Math.random() * 50);
        enemy.push(new Enemy(randomX, randomY).create());
    }


    for (var i=0; i < 10; i++)
        setTimeout(createEnemy, i * 1000);
}
 
update
 
Here's a version with setInterval and clearInterval. You still have to count how many enemies you've created so far, and you have to use interval id in clearInterval call. Haven't tested this, sorry!
 
var initEnemies = function () {
    var numEnemiesCreated = 0;
    var intervalId;

    function createEnemy() {
        var randomX = Math.floor(Math.random() * 190);
        var randomY = Math.floor(Math.random() * 50);
        enemy.push(new Enemy(randomX, randomY).create());

        // Unschedule ourselves after 10th run
        numEnemiesCreated += 1;
        if (numEnemiesCreated == 10)
            clearInterval(intervalId);    
    }


    intervalId = setInterval(createEnemy, 1000);
}