如何从卡片或类似物中获取标题与弹性盒子具有相同的高度？

问题描述 投票：2回答：2

请不要乱砍

没有硬编码。这个想法并不能解决一个案例，例如：对于有4列的情况，但解决它的动态内容和响应屏幕大小。

对我来说问题是，它基本上不是直接的孩子，而是它的内容

codepen在这里：

https://codepen.io/anon/pen/OxzrzV

HTML

<h1>disclaimer: resize the window. Make the blue headers in a row match height</h1>
<div class="row mycontainer">
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
      </div>
  </div>
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">oh no this header wraps</div>
        <div class="content">some content lala </div>
      </div>
  </div>
</div>

CSS

 body{
  padding: 20px;
}

.item{
  height: 100%;
  padding-right: 20px;
  padding-top: 20px;
  display: flex;
  flex-direction: column
}

.header{
  background-color: cornflowerblue;
}

.content{
  background-color: salmon;
  flex-grow: 1;
}

.mycontainer{
  max-width: 500px;
}

我想要什么？

蓝色标题总是与当前行中的所有元素具有相同的大小。

一个坚实的jquery解决方案也很好......但它必须是万无一失的，并且也可以调整大小。 html结构的一般变化也很好。但必须做出正确回应。

所以这（通过硬编码实现并且没有响应）：

enter image description here

jquery css twitter-bootstrap css3 flexbox
2个回答
1
投票

基本上有两种方法可以实现这一点，CSS方式，

和脚本方式，这里使用jQuery。

第一个脚本示例显示如何在所有项目上设置相等的高度。

第二个样本集每行等于高度，并且使其工作的方法是检查项目的最高值（它为新行更改）并设置每个已处理范围/行的高度。

我还添加了一些优化，预加载项目，因此如果只有一个项目或列，它将不会处理它们。

Updated codepen 1

堆栈代码段1

(function ($) {

  // preload object array to gain performance
  var $headers = $('.header')
  
  // run at resize
  $( window ).resize(function() {
    $.fn.setHeaderHeight(0);   
  });  

  $.fn.setHeaderHeight = function(height) {

    // reset to auto or else we can't check height
    $($headers).css({ 'height': 'auto' });
    
    // get highest value
    $($headers).each(function(i, obj) {    
      height = Math.max(height, $(obj).outerHeight()) 
    });

    // set the height
    $($headers).css({ 'height': height + 'px' });    
  }

  // run at load
  $.fn.setHeaderHeight(0);
  
}(jQuery));
body{
  padding: 20px;
}

.item{
  height: 100%;
  padding-right: 20px;
  padding-top: 20px;
  display: flex;
  flex-direction: column
}

.header{
  background-color: cornflowerblue;
}

.content{
  background-color: salmon;
  flex-grow: 1;
}

.mycontainer{
  max-width: 500px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.css" rel="stylesheet"/>

<div class="row mycontainer">
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
      </div>
  </div>
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">oh no this header wraps</div>
        <div class="content">some content lala </div>
      </div>
  </div>
</div>

Updated codepen 2

堆栈代码段2

(function ($) {
  //  preload object array to gain performance
  var $headers = $('.header')

  // only do this if there is more than 1 item
  if ($headers.length < 2) { return; }
    
  //  run at resize
  $( window ).resize(function() {
    $.fn.setHeaderHeight(0,0);   
  });

  $.fn.setHeaderHeight = function(height, idx) {
    // reset to auto or else we can't check height
    $($headers).css({ 'height': 'auto' });
     
    $($headers).each(function(i, obj) {    

      // only continue if there is more than 1 column
      if ($($headers).eq(0).offset().top !== $($headers).eq(1).offset().top  ) {
        return false;
      }
      
      // get highest value
      height = Math.max(height, $(obj).outerHeight()) 
      
      // did top value changed or are we at last item
      if (i != 0 && $($headers).eq(i - 1).offset().top != $(obj).offset().top) {

        // set height for row
        $($headers).slice(idx, i).css({ 'height': height + 'px' });
        
        // reset height and startIndex
        height = 0;
        idx = i;
      } else if ($headers.length - 1 == i) {
        
        // last row
        $($headers).slice(idx, i + 1).css({ 'height': height + 'px' });   
      }

    });        
  }
  
  //  run at load
  $.fn.setHeaderHeight(0,0);

}(jQuery));
body{
  padding: 20px;
}

.item{
  height: 100%;
  padding-right: 20px;
  padding-top: 20px;
  display: flex;
  flex-direction: column
}

.header{
  background-color: cornflowerblue;
}

.content{
  background-color: salmon;
  flex-grow: 1;
}

.mycontainer{
  max-width: 500px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.css" rel="stylesheet"/>

<div class="row mycontainer">
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
      </div>
  </div>
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">oh no this header wraps</div>
        <div class="content">some content lala </div>
      </div>
  </div>
</div>

由于有些人更喜欢简单的javascript，我也更新了这样的样本（在所有项目上设置相等的高度），它们使用计算出的height值动态地应用/添加一个类。

堆栈代码段

(function(d,t,h) {
  /*  preload some variables  */
  h = (d.head || d.getElementsByTagName('head')[0]);
  var items = d.querySelectorAll('.header');
  
  function resized() {
    var heights = [], i = 0, css;
    /*  delete set style so we get proper value  */
    removeElement('head_dynamic_css');
    for (i = 0; i < items.length; i++) {
      heights.push(parseFloat(window.getComputedStyle(items[i], null).getPropertyValue("height")));
    }
    css = ".header { height: " + Math.max.apply(null, heights) + "px; }";
    /*  create and add style with height  */
    var s = d.createElement('style');
    s.type = 'text/css';
    s.id = 'head_dynamic_css';
    if (s.styleSheet) {
      s.styleSheet.cssText = css
    } else {
      s.appendChild(d.createTextNode(css));
    }
    h.appendChild(s);
  }

  window.addEventListener("load", resized, false);
  window.addEventListener("resize", resizer, false);
  function resizer() {
    if (!t) {
      t = setTimeout(function() {
        t = null;
        resized();
       }, 66);
    }
  }
  function removeElement(el) {
    var el = document.getElementById(el);
    if (el) {
      el.parentElement.removeChild(el);
    }
  }
}(document,null));
body {
  padding: 20px;
}

.item {
  height: 100%;
  padding-right: 20px;
  padding-top: 20px;
  display: flex;
  flex-direction: column
}

.header {
  background-color: cornflowerblue;
}

.content {
  background-color: salmon;
  flex-grow: 1;
}

.mycontainer {
  max-width: 500px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.css" rel="stylesheet"/>

<div class="row mycontainer">
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
      </div>
  </div>
  <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
    <div class="item">
       <div class="header">bippo</div>
        <div class="content">some content lala some content lala some content lala </div>
    </div>
  </div>
    <div class="col-12 col-md-4 col-lg-3">
      <div class="item">
       <div class="header">oh no this header wraps</div>
        <div class="content">some content lala </div>
      </div>
  </div>
</div>
0
投票

在这里你有我的jQuery方法。事情变得更复杂，因为你希望你想要每行的高度相等，但与其余部分无关。

我所做的是使用每个元素的顶部位置作为行标识符，遍历所有标题，为它们添加一个具有此位置的类，以便稍后我们可以使用该类选择整行。在每个循环中，我检查高度并保存最大值，当我检测到我们处于新行（顶部位置已更改）时，我使用类I将行最大高度应用于上一行的所有元素分配了。

这是代码......

function adjustHeaderHeights() {

    // First reset all heights to just increase if needed.
    $('div.header').css('height','auto');

    var curRow=$('div.header').first().offset().top,
        curRowMaxHeight=$('div.header').first().height();
    var n = $('div.header').length;

    $('div.header').each(function(index) {

        // Get header top position as row identifier, and add it as a class.
        var rowId = $(this).offset().top;
        $(this).addClass('rowid'+rowId);

        if (rowId != curRow) {  // It's a new row.
            $('div.header.rowid'+curRow).height(curRowMaxHeight);
            curRow = rowId;
            curRowMaxHeight=$(this).height();
        }
        else {
            curRowMaxHeight = $(this).height() > curRowMaxHeight ? $(this).height() : curRowMaxHeight;

            // It's the last header element, so we adjust heights of the last row.
            if (index+1 == n)
                $('div.header.rowid'+curRow).height(curRowMaxHeight);
        }
    });

}

$(window).resize(function() {
    adjustHeaderHeights();
});

adjustHeaderHeights();

我希望它有所帮助

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