问题描述
我有一个使用BS和bootstrap-slider.js构建的范围滑块,通过拖动它可以很好地工作:
<div class="container range">
<div class="row">
<div class="col-sm-2">
</div>
<div class="col-sm-8">
<div id="ex6CurrentSliderValLabel">
<span id="ex6SliderVal">2.5</span>
</div>
<input id="ex6" type="text" data-slider-min="0" data-slider-max="4" data-slider-step="0.01" data-slider-value="2.5"/>
</div>
<div class="col-sm-2">
</div>
</div>
</div>
JS:
$("#ex6").slider();
$("#ex6").on("slide",function(slideEvt) {
$("#ex6SliderVal").text(slideEvt.value);
});
正在工作的小提琴:https://jsfiddle.net/kjuh62yg/
我还要添加加号和减号箭头(按钮),以通过单击鼠标增加或减少值。
解决方法
您可以简单地使用引导滑块的getValue
和setValue
到increment
并通过单击slider
或button
来降低+
的值或-
登录我为您创建的demo
。
在increment
中,您将获得当前值并通过设置该值并添加到0.01
float number
的滑块值来增加该值。为了确保我们要添加correct
浮点数value
,我们可以使用toFixed()函数,该函数可以确保我们添加的浮点数decimal
不是直接精确的数字。
在decrement
中,我们使用相同的值,但在这种情况下,我们减去slider
的值,并向后移动以获得视觉效果,并更新跨度文本
实时演示:
let mySlider = $("#ex6").slider(); //initiate slider
let spanText = $("#ex6SliderVal") //span text
let addValue = 0.01; //add float to increment
$("#ex6").on("slide",function(slideEvt) {
spanText.text(slideEvt.value)
});
//Increment
$(".add").on("click",function() {
let currValue = mySlider.slider('getValue'); //get current value
mySlider.slider('setValue',parseFloat(currValue + addValue).toFixed(2)) //increment value of slider
spanText.text(currValue) //show span
});
//Decrement
$(".subtract").on("click",parseFloat(currValue - addValue).toFixed(2)) //decreamnet value of slider
spanText.text(currValue) //show span
});
.range {
margin-top: 40px;
text-align: center;
}
#ex6CurrentSliderValLabel {
margin-bottom: 20px;
text-align: center;
font-size: 56px;
font-weight: 600;
}
.slider.slider-horizontal {
width: 100%;
}
.slider.slider-horizontal:before {}
.subtract {
cursor: pointer;
margin-right: 6%;
}
.add {
cursor: pointer;
margin-left: 6%;
}
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<!-- Popper JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-slider/11.0.2/bootstrap-slider.min.js" integrity="sha512-f0VlzJbcEB6KiW8ZVtL+5HWPDyW1+nJEjguZ5IVnSQkvZbwBt2RfCBY0CBO1PsMAqxxrG4Di6TfsCPP3ZRwKpA==" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-slider/11.0.2/css/bootstrap-slider.min.css" integrity="sha512-3q8fi8M0VS+X/3n64Ndpp6Bit7oXSiyCnzmlx6IDBLGlY5euFySyJ46RUlqIVs0DPCGOypqP8IRk/EyPvU28mQ==" crossorigin="anonymous"
/>
<div class="container range">
<div class="row">
<div class="col-sm-2">
</div>
<div class="col-sm-8">
<div id="ex6CurrentSliderValLabel">
<span id="ex6SliderVal">0</span>
</div>
<i class="fa fa-minus subtract" aria-hidden="true"></i>
<input id="ex6" type="text" data-slider-min="0" data-slider-max="4" data-slider-step="0.01" data-slider-value="0" />
<i class="fa fa-plus add" aria-hidden="true"></i>
</div>
<div class="col-sm-2">
</div>
</div>
</div>
,
笨拙,需要重构,但是可以正常工作
var slider = new Slider("#ex6");
var valueConteiner = document.getElementById("ex6SliderVal");
slider.on("slide",function(sliderValue) {
valueConteiner.textContent = sliderValue;
});
function incrementDecrement(el,value) {
let currentValue = slider.getValue();
if(el[0].id === "plus") {
slider.setValue(currentValue + value)
} else if(el[0].id === "minus") {
slider.setValue(currentValue - value)
}
valueConteiner.textContent = slider._state.value[0];
}
$('.container.range')
.off('click','#plus,#minus')
.on('click',#minus',function(e) {
if ($(this).attr('id').match('plus')) {
incrementDecrement($(this),1) // second parameter determines increment step
} else {
incrementDecrement($(this),0.1) // second parameter determines decrement step
}
})
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.2/js/bootstrap.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-slider/11.0.2/bootstrap-slider.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-slider/11.0.2/css/bootstrap-slider.min.css">
<div class="container range">
<div class="row">
<div class="col-sm-2">
</div>
<div class="col-sm-8">
<div id="ex6CurrentSliderValLabel">
<span id="ex6SliderVal">2.5</span>
</div>
<input id="ex6" type="text" data-slider-min="0" data-slider-max="4" data-slider-step="0.01" data-slider-value="2.5"/>
</div>
<div class="col-sm-2">
</div>
</div>
<button id="plus">+</button>
<button id="minus">-</button>
</div>