我有图像的文件输入,接受多个。此外,我有引导旋转木马之前,上传它的小演示。问题是:我有多个图像,所以我有多个img src代码。但是jquery只给了我一次使用fileReader的预览。我怎么才能让它成为可能呢?请帮帮我。
jsfiddle https://jsfiddle.net/6gsybxd9/1/
下面是我的代码:
<div class="form-group">
<label>Img (.png/ .gif/ .jpeg):</label>
<input type="file" multiple="multiple" accept="image/x-png,image/gif,image/jpeg" / id="imgfiles">
</div>
<div class="box thumbnail col-md-2 col-xs-3" style="border-radius:0px">
<div id="carousel" class="carousel slide" data-ride="carousel">
<!-- Indicators -->
<ol class="carousel-indicators" style="margin-bottom:-15px">
<li data-target="#carousel" data-slide-to="0" class="active"></li>
<li data-target="#carousel" data-slide-to="1"></li>
<li data-target="#carousel" data-slide-to="2"></li>
</ol>
<!-- Wrapper for slides -->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img src="http://via.placeholder.com/250x250" id="item_1">
</div>
<div class="item">
<img src="http://via.placeholder.com/250x250" id="item_2">
</div>
<div class="item">
<img src="http://via.placeholder.com/250x250" id="item_3">
</div>
</div>
</div>
和Jquery代码:
<script>
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function(e) {
$('#item_1').attr('src', e.target.result); //First img
$('#item_2').attr('src', e.target.result); // Second img
$('#item_3').attr('src', e.target.result); // Third img
}
reader.readAsDataURL(input.files[0]);
}
}
$("#imgfiles").change(function() {
readURL(this);
});
</script>
发布于 2018-08-05 05:20:50
如果用户添加了4张、5张或10张图片怎么办?
您必须相应地更新您的旋转木马:
function readURL(input) {
if (input.files && input.files[0]) {
var container = $('.carousel-inner').html(''),
indicators = $('.carousel-indicators').html('');
for (var f of input.files) {
var reader = new FileReader();
reader.onload = function(e) {
var n = container.children().length;
container.append(
`<div class="item ${n ? '' : 'active'}">
<img src="${e.target.result}">
</div>`
);
indicators.append(
`<li data-target="#carousel" data-slide-to="${n}" class="${n ? '' : 'active'}"></li>`
);
}
reader.readAsDataURL(f);
}
}
}
$("#imgfiles").change(function() {
readURL(this);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="form-group">
<label>Img (.png/ .gif/ .jpeg):</label>
<input type="file" multiple="multiple" accept="image/*" / id="imgfiles">
</div>
<div class="thumbnail col-md-2 col-xs-3" style="border-radius:0px">
<div id="carousel" class="carousel slide" data-ride="carousel">
<!-- Indicators -->
<ol class="carousel-indicators" style="margin-bottom:-15px">
<li data-target="#carousel" data-slide-to="0" class="active"></li>
</ol>
<!-- Wrapper for slides -->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img src="http://via.placeholder.com/250x250" id="item_1">
</div>
</div>
</div>
</div>
https://stackoverflow.com/questions/51689212
复制相似问题