我正在制作一个基于文本的RPG，你可以在每个屏幕上说是或否，我需要帮助删除eventlistener

Question

所以，我有一个函数可以检查你是否按了'n'或'y'，当你按下'n'时，一个数字会攻击你，之后它应该删除事件监听器，然后给你机会赢得战斗，但在此之前有一个屏幕，说按任意键继续，但该屏幕不显示。 救命？

我已经研究了一段时间，它只是不工作，它不会删除事件监听器。

在命名你的角色和东西之后，这是开始屏幕代码

document.body.innerHTML = "<h4>As you are walking to the bar at a pub, a dark, hooded figure, pulls you aside to a corner: 'Listen, I have a job for you...'</h4><h2>Press 'Y' to accept, and 'N' to turn back to the bar</h2><img id='hoodedFigure' src='https://render.fineartamerica.com/images/rendered/default/print/6.125/8.000/break/images-medium/the-hooded-figure-kayleigh-semeniuk.jpg'>";

//然后它添加了事件监听器：

var event1 = window.addEventListener("keydown", checkKeyPressed, false);

//这是它调用的函数：

        {if (evt.keyCode == "89") {
        changeContentOnPressY(1);
    } if (evt.keyCode == "78") {
changeContentOnPressN(1);
    }}}```

//Then it calls this function to change the screen:

```function changeContentOnPressN(num) {
        if (num == 1) {
    window.removeEventListener("keydown", checkKeyPressed, false);
    document.body.innerHTML = "The strange figure draws his weapons and agresses on you. You draw your small blade, and attempt to slash his stomach.<h3 style='text-align:center;'>Press any key to continue...</h3>";
            window.addEventListener("keydown", chance(1), false);
        } if(num == 2) {
window.addEventListener("keydown", checkKeyPressed2, false);
document.body.innerHTML = ""; // for 2nd n path}}```

//This is the part that is not working:

```window.removeEventListener("keydown", checkKeyPressed, false);```

This is the chance() function:

```function chance(num) {
    if (num == 1) {
        var chance = Math.random(0.1, 1);
 if (chance >= 0.80) {
 document.body.innerHTML = "Suddenly a swaggering figure walks towards you he says intrduces himself as Jean-Jacques le Tourment des Ombres, Grand Connoisseur of the Ombres House, he says 'You made the right choice, he was not to be trusted. I too dont like the Sabbath Family. Together we can get revenge'. Press Y to accept and N top refuse";
 } else {
 document.body.innerHTML = "He quickly slits your right wrist, and collects the blood spilled in a barrel. Soon nobles will enjoy this aged red. <br> <h1 style='text-align:center;'>GAME OVER<h1><br><h3 style='text-align:center;'>Press any key to continue...</h3>";
 window.addEventListener("keydown", startGame1, false);}}}}```

Answer 1

你的问题中发生了很多事情，我将重点关注我认为是跳过的屏幕。 到目前为止，我可以告诉它应该删除事件监听器。

在你的代码中你有这个段，它应该等待玩家按任意键。

window.addEventListener("keydown", chance(1), false);

问题是你立即调用“机会”功能，而不是等待。

如果你想再次解开该功能，你就可以了

function waitForChance() {
    chance(1)
}

window.addEventListener("keydown", waitForChance, false);

然后你可以在以后取消绑定

window.removeEventListener("keydown", waitForChance, false);

顺便说一下，如果我是你，我可能会尽量避免重新绑定和重新绑定事件监听器，因为它容易出错（并且难以阅读）。 我可能会创建一个这样的状态系统，您可以在其中创建对象并在它们之间切换。 我认为它更清楚哪些功能属于哪种状态。

 // every state has 2 properties text and options // text is what is displayed on the screen // options contain the functions that are executed when the user presses a key // if you want to bind a specific just bind enter that key in lower case // if you want to accept any key add a function on anyKey //---------------- STATES -------------------------- let startState = { text: `<h4>As you are walking to the bar at a pub, a dark, hooded figure, pulls you aside to a corner: 'Listen, I have a job for you...'</h4><h2>Press 'Y' to accept, and 'N' to turn back to the bar</h2><img id='hoodedFigure' src='https://render.fineartamerica.com/images/rendered/default/print/6.125/8.000/break/images-medium/the-hooded-figure-kayleigh-semeniuk.jpg'>`, options: { y: function() { loadState(takeDealState) }, n: function() { loadState(ambushState) } } } let takeDealState = { text: `What ever happend when you take the deal (for now i reload the game on anykey)`, options: { /*Your options when you take the deal for now I just reset the game*/ anyKey: function() { loadState(startState) } } } let ambushState = { text: `The strange figure draws his weapons and agresses on you. You draw your small blade, and attempt to slash his stomach.<h3 style='text-align:center;'>Press any key to continue...</h3>`, options: { anyKey: function() { var chance = Math.random(0.1, 1) if (chance >= 0.80) { loadState(successfullAmbush) } else { loadState(failedAmbush) } } } } let successfullAmbush = { text: `Suddenly a swaggering figure walks towards you he says intrduces himself as Jean-Jacques le Tourment des Ombres, Grand Connoisseur of the Ombres House, he says 'You made the right choice, he was not to be trusted. I too dont like the Sabbath Family. Together we can get revenge'. Press Y to accept and N top refuse`, options: { y: function() { console.log("accept") }, n: function() { console.log("decline") } } } let failedAmbush = { text: `He quickly slits your right wrist, and collects the blood spilled in a barrel. Soon nobles will enjoy this aged red. <br> <h1 style='text-align:center;'>GAME OVER<h1><br><h3 style='text-align:center;'>Press any key to continue...</h3>`, options: { anyKey: function() { loadState(startState) } } } ///---------------- LOGIC show and handle keypresses ---------------------------------- let currentState; function loadState(state) { // set the state as the current state, so it can currentState = state; // let the state descibe the scene document.body.innerHTML = state.text; } function keyHandler(event) { if(currentState.options.anyKey) { // handle anykey currentState.options.anyKey(event.key) } else if(currentState.options[event.key]) { // handle other key presses such as y/n currentState.options[event.key](event.key) } } window.addEventListener("keypress", keyHandler, true) // start the game loadState(startState)