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Javascript 小游戏

转载 作者:行者123 更新时间:2023-11-28 00:12:42 28 4
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现在我正在学习一些 Javascript,但由于我的技能很低,现在遇到了很多问题。我需要一些帮助来解决这段代码中的几个问题。

我正在尝试编写一个名为“打鱼”的游戏。它有一个计时器、分数和 onclick。Onlclick 鱼应该消失,1 分将添加到分数中。计时器限制为 60 秒。

这是完整的代码。

<html>  
<head>
<title>
Hit the fish!
</title>
<style>
table{
margin-left: auto;
margin-right: auto;
width: 70%;
height: 90%;
background-color:#66ff00;
}
#playground input{
position: inherit;
height: 100px;
width: 100px;
margin-left: 20px;
margin-right: 20px;
margin-bottom: 20px;
}
#input {
height:40px;
}
#area {
background-color:#888;
position:absolute;
left:0px;
right:0px;
top:50px;
bottom:0px;
}
#area button {
width:150px;
height:30px;
position:absolute;
}
.red {
color:red;
}

</style>

<script language="Javascript">
function one () {
document.play.one.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}

function two () {
document.play.two.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}

function three () {
document.play.three.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}

function four () {
document.play.four.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}

function five () {
document.play.five.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;

}

function six () {
document.play.six.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}

function seven () {
document.play.seven.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}

function eight () {
document.play.eight.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}

function nine () {
document.play.nine.value="";
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}


function count()
{
stop();
// get the counter element
var counter = document.getElementById("counter");
// get it's value
var value = parseInt(counter.innerHTML);
// increase it
value = value + 1;
// write the new value back
counter.innerHTML=value;
// limitation
if(value===60){
alert("Time Out!");
clearInterval(countTimer);
document.getElementById("counter").innerHTML="0";
document.getElementById("score").innerHTML="0";
}
}

function start () {
stop();
var countTimer = setInterval("count()",1000);
document.play.four.value=">( °3°)";
document.play.three.value=">( °3°)";
setTimeout("nextone ()");
var score = document.getElementById("score");
}
function score(){
// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;
}
function nextone () {
document.play.four.value="";
document.play.five.value=">( °3°)";

setTimeout("nexttwo ()",400);
}

function nexttwo () {
document.play.three.value="";
setTimeout("nextthree()",400);
}

function nextthree () {
document.play.seven.value=">( °3°)";
document.play.one.value=">( °3°)";
document.play.six.value=">( °3°)";
setTimeout("nextfour ()",700);
}

function nextfour () {
document.play.one.value="";
document.play.six.value="";
document.play.two.value=">( °3°)";
setTimeout("nextfive ()",700);
}

function nextfive () {
document.play.seven.value="";
document.play.two.value="";
document.play.four.value=">( °3°)";
setTimeout("nextsix ()",800);
}

function nextsix () {
document.play.eight.value=">( °3°)";
document.play.two.value=">( °3°)";
setTimeout("nextseven ()",700);
}

function nextseven () {
document.play.eight.value="";
document.play.five.value=">( °3°)";
setTimeout("nexteight ()",400);
}

function nexteight () {
document.play.nine.value=">( °3°)"
document.play.four.value=">( °3°)";
setTimeout("nextnine ()",500);
}

function nextnine () {
document.play.five.value="";
document.play.four.value="";
document.play.one.value=">( °3°)";
setTimeout("nextten ()",200);
}

function nextten () {
document.play.three.value=">( °3°)";
document.play.six.value=">( °3°)";
setTimeout("nexteleven ()",600);
}

function nexteleven () {
document.play.one.value="";
document.play.seven.value=">( °3°)";
setTimeout("nexttwelve ()",500);
}

function nexttwelve () {
document.play.two.value=">( °3°)";
document.play.nine.value=">( °3°)";
setTimeout("nextthirteen ()",700);
}

function nextthirteen () {
document.play.one.value=">( °3°)";
document.play.nine.value="";
document.play.seven.value="";
setTimeout("start ()",600);
}

function stop () {
clearInterval(countTimer);
document.play.one.value="";
document.play.two.value="";
document.play.three.value="";
document.play.four.value="";
document.play.five.value="";
document.play.six.value="";
document.play.seven.value="";
document.play.eight.value="";
document.play.nine.value="";
}
function reset()
{
document.getElementById("counter").innerHTML="0";
document.getElementById("score").innerHTML="0";
}

// get the counter element
var score = document.getElementById("score");
// get it's value
var value = parseInt(score.innerHTML);
// increase it
value = value + 1;
// write the new value back
score.innerHTML=value;


</script>
</head>

<body>
<div id="input">
<button onclick="start()">start</button>
<button onclick="stop()">stop</button>
<button onclick="reset()">reset</button>
<div style="font-size:10em" id="counter">0</div><br>
<p>Your score:</p><div style="font-size:5em" id="score">0</div>
<script>
var countTimer = setInterval('count()',1000);
</script>
</div>
<div id="playground">
<table border=100 cellpadding=0 cellspacing=0>
<tr>
<td>
<form name="play">
<center>
<INPUT TYPE="button" NAME="one" OnClick="one ()" id="one" value=" ">
<INPUT TYPE="button" NAME="two" OnClick="two ()" id="two" value=" ">
<INPUT TYPE="button" NAME="three" OnClick="three ()" id="three" value=" ">
<br>
<INPUT TYPE="button" NAME="four" OnClick="four ()" id="four" value=" ">
<INPUT TYPE="button" NAME="five" OnClick="five ()" id="five" value=" ">
<INPUT TYPE="button" NAME="six" OnClick="six ()" id="six" value=" ">
<br>
<INPUT TYPE="button" NAME="seven" OnClick="seven ()" id="seven" value=" ">
<INPUT TYPE="button" NAME="eight" OnClick="eight ()" id="eight" value=" ">
<INPUT TYPE="button" NAME="nine" OnClick="nine ()" id="ten" value=" ">
<br>
</td>
</tr>
</table>
</div>
</body>
</html>

问题是在 20 - 30 之后计数器走得太快,点击按钮后鱼没有消失,也没有在分数上加分。

最佳答案

排名不分先后......

(1) 计数器的问题是由于您调用它的方式以及您存储 countTimer 变量的位置。因为您希望多个函数都能够访问 countTimer,所以您应该以它们都可以访问的方式声明它;最简单的方法是让它成为一个全局变量,你只需拥有

var countTimer;

在脚本的顶部,在别处引用 countTimer 时使用 var。您从函数 nextThirteen 调用函数 start,然后再次开始设置计时器。这实际上是在旧计时器之上设置了一个新计时器,这就是计数似乎加快的原因。

(2) 您的 html 也无效,这可能会导致一些问题;确保关闭 formcenter 标签。 (无论如何,你不再是 not supposed to use the center tag)。

(3) 您的代码位于 head 中,但大部分代码会在页面加载之前立即运行。所以下面一行:

var score = document.getElementById("score");

(在任何函数之外)导致错误,因为尚未写入元素分数。避免这种情况的最简单方法是将脚本放在页面正文的末尾。

(4) 函数onetwothree 需要与表单中的输入具有不同的名称。这就是为什么所有按钮都不起作用的原因。

随着您的深入了解,一些一般要点:

  • 避免重复。不需要所有的一、二、三功能等。您可以使用循环或单个事件处理程序来找出按下了哪个按钮。
  • 使用浏览器的控制台检查正在产生的错误。您的代码导致了错误object is not a function,并且 searching for that这就是我发现按钮不起作用的原因。
  • 了解 variable scope

关于Javascript 小游戏,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14183790/

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