有点Bug。。点了stop后停止，再点2次start后再点stop就停止不了了....
流星雨_1
2015-09-26 23:24
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
i=setInterval("clock()",1000);
function clock(){
var time=new Date();
document.getElementById("clock").value = time;
}
function mystart(){
i=setInterval("clock()",1000);
}
function myclear(){
clearInterval(i);
}
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
<input type="button" value="Stop" onclick="myclear()" />
<input type="button" value="Start" onclick="mystart()" />
</form>
</body>
</html>
2回答
-
- 流星雨_1
- 2015-09-27 12:07:40
是的，谢谢楼上的回答~^O^ 给我了一个思路。你这个代码运行后如果先点一次start后还是停止不了...
下边是在你基础上改进的：
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
var i=setInterval("clock()",1000);
var count = 0;
function clock(){
var time=new Date();
document.getElementById("clock").value = time;
console.log(time);
}
function mystart(){
if(count > 0 ){
i=setInterval("clock()",1000);
count--;
}
}
function myclear(){
clearInterval(i);
count = 1;
}
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
<input type="button" value="Stop" onclick="myclear()" />
<input type="button" value="Start" onclick="mystart()" />
</form>
</body>
</html>
-
- Y_du
- 2015-09-27 07:56:16
这个问题是，你点击了多次开始。想到开启了多个定时器。而你在关的时候只关了一个。所以会导致关不了。
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>计时器</title> <script type="text/javascript"> i=setInterval("clock()",1000); function clock(){ var time=new Date(); document.getElementById("clock").value = time; console.log(time); } var count = 0; function mystart(){ if(count == 0){ i=setInterval("clock()",1000); } count = 1; } function myclear(){ clearInterval(i); count = 0; } </script> </head> <body> <form> <input type="text" id="clock" size="50" /> <input type="button" value="Stop" onclick="myclear()" /> <input type="button" value="Start" onclick="mystart()" /> </form> </body> </html>这样是一个不优雅的解决办法
JavaScript进阶篇
467385 学习 · 21877 问题
相似问题