Question

我正在编写一个程序来检查是否选中了一个单选按钮。我所拥有的是一个良好的开端，但我可以使用一些帮助完全实现这种类型的单选按钮代码。 div还没有完全切换。

<?php
?>
<!DOCTYPE html>
<html>
<head>
<title>My Title</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
<script>
$(document).ready(function(){
$('#enteraddress').toggle();
$('#entercoords').toggle();
//$('#enteraddress').click(function () { $('#enteraddress').hide(); });
    if ($('#byaddress:checked').val() == 'true') {         
        $('#enteraddress').toggle();
    }
});
</script>
</head>
<body>
<div style='border: solid 1px black; margin-bottom: 10px;' id="legaldisclaimer">
<h1>Legal Disclaimer:</h1>
<p>Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war.
We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live.
It is altogether fitting and proper that we should do this.But, in a larger sense, we can not dedicate -- we can not consecrate -- we can not hallow -- this ground.
The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract.
The world will little note, nor long remember what we say here, but it can never forget what they did here.
It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced.
It is rather for us to be here dedicated to the great task remaining before us --
that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion --
that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom --
and that government of the people, by the people, for the people, shall not perish from the earth.</p>
</body>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="locationoptions">
<h3>How would you like to enter your location data?</h3>
<input type="radio" name="locationradios" id="byaddress">By physichal address?</input></br>
<input type="radio" name="locationradios" id="bylatlng">By latitude and longitude?</input>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="enteraddress">
<h3>Radio 1</h3>
</div>
<div style='border: solid 1px black;' id="entercoords">
<h3>Radio 2</h3>
</div>
</div>
</html>

Answer 1

尝试使用：

$("input").is(':checked')

Answer 2

尝试将if条件更改为

if($("input[type='radio']:checked").attr('id') == "byaddress"){
  $('#enteraddress').toggle();
}

而不是

if ($('#byaddress:checked').val() == 'true') {         
        $('#enteraddress').toggle();
    }

Answer 3

$("selector").is(':checked')返回布尔值。所以你可以这样做：

if ( $("#byaddress").is(':checked') == true ) {
    ...
}

Answer 4

<?php
?>
<!DOCTYPE html>
<html>
<head>
<title>My Title</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
<script>
$(document).ready(function(){

$('#enteraddress').hide();
$('#entercoords').hide();
$('#theyellow').hide();

$("#radio01").click(function() {
if ($(this).is(':checked')) { $('#enteraddress').show(); $('#theyellow').show(); $('#entercoords').hide();  }
});

$("#radio02").click(function() {
if ($(this).is(':checked')) { $('#entercoords').show(); $('#theyellow').show(); $('#enteraddress').hide();  }
});

});
</script>
</head>
<body>
<form name="mymapgetter" action="action.php">
<div style='border: solid 1px black; margin-bottom: 10px;' id="legaldisclaimer">
<h1>Legal Disclaimer:</h1>
<p>Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war.
We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live.
It is altogether fitting and proper that we should do this.But, in a larger sense, we can not dedicate -- we can not consecrate -- we can not hallow -- this ground.
The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract.
The world will little note, nor long remember what we say here, but it can never forget what they did here.
It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced.
It is rather for us to be here dedicated to the great task remaining before us --
that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion --
that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom --
and that government of the people, by the people, for the people, shall not perish from the earth.</p>
</body>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="locationoptions">
<h3>How would you like to enter your location data?</h3>
<input type="radio" name="radio" value="" id="radio01">By physichal address?</input></br>
<input type="radio" name="radio" value="" id="radio02">By latitude and longitude?</input>
</div>
<div style='border: solid 1px black; margin-bottom: 10px;' id="enteraddress">
<h3>Enter your physichal address:</h3></br>
<input type="text" name="theaddress" value="" style="width: 100%;"></input>
</div>
<div style='border: solid 1px black;' id="entercoords">
<h3>Enter your latitude and longitude:</h3>
<input type="text" name="thelat" value=""><- Lat.</input><input type="text" name="thelng" value=""><- Lng.</input>
</div>
<input type="submit" id="theyellow" value="getmap" style="width: 100%"></input>
</form>
</html>

Answer 5

我遍历了一组输入元素（this）并构建了一个字符串，然后我用它来获取'name'的值（用于表单输入）

这是我发现获取单选按钮所点内容的唯一方法。当然，表格帖子会做同样的事情但我实际上无法提交。

var findit = "input:radio[name=" + $(this).attr("name") + "]:checked";
console.log($(findit).val());

jQuery单选按钮“已选中”代码

5 个答案: