我正在创建一个多项选择问题程序，我有这样一来，一旦选择了正确答案，就会生成一个新问题。
虽然我希望它自动转到下一个问题，但我希望它延迟大约0.5秒，以便用户可以看到他们的答案是正确的。
我选择删除该类并将其替换为另一个类，以便背景改变颜色。一旦新问题出现，我希望所有颜色都恢复正常，所以我再次删除新类并将其替换为旧类。
如果我没有自动前进到新问题，颜色会按我喜欢的方式出现，但是如果我创建它以便它自动移动，我就无法保持显示相同。
在论坛中搜索后，我读到setTimeout应该有效，但我没有取得多大成功。我也尝试过制作动画以便花费时间，但这对我来说也不起作用。动画效果很好，但它仍然继续讨论新的问题。
我将包括整个程序，因为它可能会更好，但我正在处理的部分是在函数检查（）下。
我一直在试图弄清楚如何延迟一段时间，但完全不成功。哦，请善待我，我的经验很少。我只是通过做可汗学院课程学会了如何做javascript。谢谢！
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Project: listening to sounds </title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- ***************** CSS styles ***************** -->
<style>
body {
font-family: comic sans ms, sans-serif;
background-image: url("background.jpg");
background-color: rgb(216, 252, 252);
}
form {
font-size: 1.2em;
}
#text {
background-color: wheat;
width: 150px;
height: 25px;
color: blue;
font-size: 1em;
}
.SoundBite {
float: left;
clear: none;
position: absolute;
top: 130px;
left: 100px;
padding: 5px;
background: darkblue;
color: white;
height: 120px;
width: 200px;
border-radius: 50px;
margin: auto;
text-align: center;
vertical-align: middle;
font-size: 5em;
}
.SoundBite:hover {
background-color: darkgreen;
cursor: pointer;
}
.Score {
float: right;
clear: none;
position: absolute;
top: 50px;
left: 140px;
padding: 5px;
background: darkblue;
border-color: pink;
border: 5px;
opacity: 0.8;
color: white;
height: 45px;
width: 120px;
border-radius: 50px;
margin: auto;
text-align: center;
vertical-align: middle;
font-size: 2em;
pointer-events: none;
}
.Answer {
position: absolute;
color: white;
height: 45px;
width: 120px;
padding: 5px;
border-radius: 25px;
margin: auto;
text-align: center;
vertical-align: middle;
font-size: 2em;
background-color: darkblue;
}
.AnswerCorrect {
position: absolute;
color: white;
height: 45px;
width: 120px;
padding: 5px;
border-radius: 25px;
margin: auto;
text-align: center;
vertical-align: middle;
font-size: 2em;
background-color: green;
}
.Answer:hover {
background-color: #e44404;
cursor: pointer;
}
.AnswerWrong {
position: absolute;
color: white;
height: 45px;
width: 120px;
padding: 5px;
border-radius: 25px;
margin: auto;
text-align: center;
vertical-align: middle;
font-size: 2em;
background-color: red;
}
#Answer1 {
top: 20px;
left: 400px;
}
#Answer2 {
top: 85px;
left: 400px;
}
#Answer3 {
top: 150px;
left: 400px;
}
#Answer4 {
top: 220px;
left: 400px;
}
#Answer5 {
top: 290px;
left: 400px;
}
</style>
</head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<body>
<audio id="audio" src="audio/rug.mp3" autostart="false" ></audio>
<audio id = "win" src="audio/win.mp3" autostart = "true"></audio>
<audio id = "lose" src = "audio/lose.mp3" autstart = "true"></audio>
<a onclick="playSound();"><div span class="SoundBite"><i class="fa fa-file-sound-o" id="audio" src="audio/rug.mp3" autostart="false" style="font-size:64px;color:skyblue"></i></div></a>
<a onclick ="checkAnswer = 1; check();"><div class = "Answer" id="Answer1">1</div>
<a onclick ="checkAnswer = 2; check();"><div class = "Answer" id="Answer2">2</div>
<a onclick ="checkAnswer = 3; check();"><div class = "Answer" id="Answer3">3</div>
<a onclick ="checkAnswer = 4; check();"><div class = "Answer" id="Answer4">4</div>
<a onclick ="checkAnswer = 5; check();"><div class = "Answer" id="Answer5">5</div>
<div class = "Score">Score</div>
<!-- <a onclick ="next();"><div id = "Next">Start</div> -->
<!-- ********************************* Javascript programming follows ********************************* -->
<script>
$(function() {
});
// declare the variables to be used ... do I need global variables? Maybe I should think about these...
var word, ext, directory, wordPosition, decoyWordPosition, answerPosition, decoyAnswerPosition, answer, checkAnswer, correct, incorrect, tries;
directory = "audio/";
ext = ".mp3";
correct = 0;
incorrect = 0;
tries = 0;
// list of words that are spoken
word = ["dam", "dog", "dug", "cat", "cot", "cut", "ran", "rot", "rug"];
wordPosition = Math.floor(Math.random()*word.length); // returns a random array wordPosition
/***************************************************************************
** Functions:
**
**************************************************************************/
// function to display word
function displayWord() {
//$(".SoundBite").text(word[wordPosition]);
//$("#audio").attr("src", directory+word[wordPosition]+ext);
}
// function to display the answer in one of the positions that are assigned
function displayAnswer(answerNumber, wordNumber) {
$("#Answer"+answerNumber).text(word[wordNumber]);
$("#audio").attr("src", directory+word[wordPosition]+ext);
}
// function to play the sound
function playSound() {
var sound = document.getElementById("audio");
sound.play();
}
// function to play a winning sound
function win() {
var sound = document.getElementById("win");
sound.play();
}
// function to play a losing sound
function lose() {
var sound = document.getElementById("lose");
sound.play();
}
function timer() {
new Date().toLocaleTimeString();
}
function check() {
if (answer == checkAnswer) {
//$("#Answer"+checkAnswer).animate({height: "45px", opacity: '0'})
//.animate({height: "45px", opacity: '1.0'});
$("#Answer"+checkAnswer).animate({height: "45px", opacity: '0'})
.animate({height: "45px", opacity: '1.0'})
.removeClass("Answer").addClass("AnswerCorrect");
win();
correct++;
tries++;
refresh();
next();
// need a delay function -- can't get it to work.
} else {
$("#Answer"+checkAnswer).removeClass("Answer").addClass("AnswerWrong"); //css({'background-color': 'red'});
lose();
incorrect++;
tries++;
}
// write in the score
$(".Score").text(Math.round(correct/tries*100)+"%");
}
// making a function to populate the answers
function populateAnswers() {
for (var i = 0; i < 6; i++) {
if (answerPosition < 6) {
if (decoyWordPosition == wordPosition) {
answer=answerPosition
}
displayAnswer(answerPosition, decoyWordPosition);
answerPosition++;
decoyWordPosition++;
if (decoyWordPosition >= word.length) { // want to make sure that the words are within the array
decoyWordPosition = 1 // reset to the beginning to 'wrap' the array.
}
} else {
answerPosition = 1;
}
}
}
// using a random generator to place the answer in a random spot 1 through 4
function randomGenerator() {
answerPosition = Math.floor(Math.random()*4)+1;
}
// returns a random array wordPosition
function randomWord() {
wordPosition = Math.floor(Math.random()*word.length);
}
function refresh() {
for (var i = 1; i <= 5; i++) {
$("#Answer"+i).removeClass("AnswerWrong").addClass("Answer");
$("#Answer"+i).removeClass("AnswerCorrect").addClass("Answer");
}
}
/***************************************************************************
* program as a function *
**************************************************************************/
function next() {
$("#Next").text("Continue");
randomWord();
randomGenerator();
// make the decoy answers randomly
if (wordPosition == 0 || wordPosition == 1) {
// In case the array is at the beginning: make the decoy start at the same spot as the wordPosition
decoyWordPosition = wordPosition;
} else {
// start the decoy word after the word
decoyWordPosition = wordPosition -2;
}
populateAnswers();
}
next();
</script>
</body>
</html>
答案 0 :(得分：1)
仅适用于试图找到setTimeout功能解决方案的其他人。
我这样使用它：
setTimeout（myFunction（），2000）;
但是，它不适用于功能后的括号。您需要省略这些括号：
setTimeout（myFunction，2000）;