文章目录

  • 1 推荐信息
    • 1.1 思路
    • 1.2 代码
    • 1.3 知识补充
    • 1.4 效果图
  • 2 宣传海报
    • 2.1 思路
    • 2.2 代码
    • 2.3 效果图
  • 3 新闻与活动
    • 3.1 思路
    • 3.2 代码
    • 3.3 效果图

1 推荐信息

1.1 思路

看了这个gif后,可以清楚的看到产生了三个动画效果:图片”拉近”,”了解更多”从下往上显示出来,阴影。

我看了华为官网的源代码,发现图片本身就是有一个mask的,这样能让图片看起来暗一些,也就意味着,当鼠标进入的时候,只需要让mask的背景颜色更深一些,就实现了阴影的效果。至于图片”拉近”,我早就写过了,无非是把图片放大,然后超出盒子的不显示,这个也容易。但了解更多显现,难度就大了一些。我想了很久,最后只有通过位置,来把”了解更多”显示出来,想过用visibility: visible;但效果不太好,也想过用Vue的过渡效果,但是好像又不能同时产生三个效果。所以笨人先用笨法,先能实现再说。

1.2 代码

 <div class="div_container">      <div class="div_title">        <h2 class="title_h2">推荐信息</h2>      </div>      <div class="container_imgs">        <div class="div_row1">          <div class="row1_col1">            <a href="" class="col1_a1" @mouseenter="showDiv1(1)" @mouseleave="hideDiv1(1)">              <div class="a_div1">                <div class="mask"></div>                <img src="@/assets/matebook-x-pro2.jpg" alt="" class="a1_img1">              </div>              <div class="a_div2">                <div class="div2_title">                  产品                </div>                <div class="div2_info">                  HUAWEI MateBook X Pro                </div>                <div class="div2_info2">                  入目惊鸿                </div>                <div class="div2_hidden">                  了解更多                </div>              </div>            </a>          </div>          <div class="row1_col2" @mouseenter="showDiv1(2)" @mouseleave="hideDiv1(2)">            <a href="" class="col1_a1">              <div class="a_div1">                <div class="mask"></div>                <img src="@/assets/2.jpg" alt="" class="a1_img1">              </div>              <div class="a_div2">                <div class="div2_title">                  产品                </div>                <div class="div2_info">                  HUAWEI MateBook X Pro                </div>                <div class="div2_info2">                  入目惊鸿                </div>                <div class="div2_hidden">                  了解更多                </div>              </div>            </a>          </div>        </div>        <div class="div_row1">          <div class="row1_col2 " @mouseenter="showDiv1(3)" @mouseleave="hideDiv1(3)">            <a href="" class="col1_a1">              <div class="a_div1">                <div class="mask"></div>                <img src="@/assets/3.jpg" alt="" class="a1_img1">              </div>              <div class="a_div2">                <div class="div2_title">                  产品                </div>                <div class="div2_info">                  HUAWEI MateBook X Pro                </div>                <div class="div2_info2">                  入目惊鸿                </div>                <div class="div2_hidden">                  了解更多                </div>              </div>            </a>          </div>          <div class="row1_col3" @mouseenter="showDiv1(4)" @mouseleave="hideDiv1(4)">            <a href="" class="col1_a1">              <div class="a_div1">                <div class="mask"></div>                <img src="@/assets/4.jpg" alt="" class="a1_img1">              </div>              <div class="a_div2">                <div class="div2_title">                  产品                </div>                <div class="div2_info">                  HUAWEI MateBook X Pro                </div>                <div class="div2_info2">                  入目惊鸿                </div>                <div class="div2_hidden">                  了解更多                </div>              </div>            </a>          </div>        </div>        <div class="div_row3">          <div class="row1_col2 " @mouseenter="showDiv1(5)" @mouseleave="hideDiv1(5)">            <a href="" class="col1_a1">              <div class="a_div1">                <div class="mask"></div>                <img src="@/assets/5.jpg" alt="" class="a1_img1">              </div>              <div class="a_div2">                <div class="div2_title">                  产品                </div>                <div class="div2_info">                  HUAWEI MateBook X Pro                </div>                <div class="div2_info2">                  入目惊鸿                </div>                <div class="div2_hidden">                  了解更多                </div>              </div>            </a>          </div>          <div class="row1_col2 col2_displacement" @mouseenter="showDiv1(6)" @mouseleave="hideDiv1(6)">            <a href="" class="col1_a1">              <div class="a_div1">                <div class="mask"></div>                <img src="@/assets/6.jpg" alt="" class="a1_img1">              </div>              <div class="a_div2">                <div class="div2_title">                  产品                </div>                <div class="div2_info">                  HUAWEI MateBook X Pro                </div>                <div class="div2_info2">                  入目惊鸿                </div>                <div class="div2_hidden">                  了解更多                </div>              </div>            </a>          </div>          <div class="row1_col2 col2_displacement" @mouseenter="showDiv1(7)" @mouseleave="hideDiv1(7)">            <a href="" class="col1_a1">              <div class="a_div1">                <div class="mask"></div>                <img src="@/assets/7.jpg" alt="" class="a1_img1">              </div>              <div class="a_div2">                <div class="div2_title">                  产品                </div>                <div class="div2_info">                  HUAWEI MateBook X Pro                </div>                <div class="div2_info2">                  入目惊鸿                </div>                <div class="div2_hidden">                  了解更多                </div>              </div>            </a>          </div>        </div>      </div>    </div>

这里需要提一下,由于需要操作的是多个div,我用了根据类名操作Dom的方式,所以需要传一下是第几个Dom

 methods: {    showDiv1(value) {      var d1 = document.getElementsByClassName('a_div2')[value - 1];      // alert("悬浮上来了")      d1.style.cssText = 'animation-name:example; animation-duration:0.5s;animation-fill-mode: forwards;z-index:3;'      var d3 = document.getElementsByClassName('a1_img1')[value - 1];      d3.style.cssText = 'animation-name:showBigImg2; animation-duration:0.5s;animation-fill-mode: forwards; '      var d2 = document.getElementsByClassName('mask')[value - 1];      d2.style.cssText = ' z-index:2; background: linear-gradient(rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.4) 70%);'    },    hideDiv1(value) {      var d1 = document.getElementsByClassName('a_div2')[value - 1];      d1.style.cssText = ' animation-name:backwards; animation-duration:0.5s;animation-fill-mode: forwards;z-index:3;';      var d3 = document.getElementsByClassName('a1_img1')[value - 1];      d3.style.cssText = 'animation-name:cancelBigImg2; animation-duration:0.5s;animation-fill-mode: forwards; '      var d2 = document.getElementsByClassName('mask')[value - 1];      d2.style.cssText = 'background: linear-gradient(rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.3) 70%);z-index:2;'      // d1.style.cssText = ' animation-name:backwards; animation-duration:0.5s;animation-fill-mode: forwards;';    } }

要记得设置一下mask的z-index级别(比图片大即可),不然在图片放大的过程中,mask会被遮挡住,这样就实现不了阴影的效果,而且很突兀。

.div_container {  width: 85.652%;  /* border: 1px solid; */  margin: 0 auto;  text-align: center;}.div_title {  width: 100%;  height: 100%;  margin-bottom: 5%;}.title_h2 {  width: 10%;  height: 90%;  padding-bottom: 8px;  font-size: 30px;  margin: 0 auto;  position: relative;}.title_h2::after {  position: absolute;  content: '';  height: 2px;  width: 47%;  top: 100%;  left: 27%;  background-color: #c7000b;}.container_imgs {  height: auto;  width: 100%;}.div_row1 {  height: auto;  width: 100%;  display: flex;  margin-bottom: 30px !important;  overflow: hidden;}.div_row3 {  height: auto;  width: 100%;  display: flex;  margin-bottom: 30px !important;}.row1_col1 {  width: 836.98px;  height: auto;  position: relative;  margin-right: 30px;  z-index: 3;}.row1_col3 {  width: 836.98px;  height: auto;  position: relative;  margin-left: 30px;  z-index: 3;}.col1_a1 {  width: 100%;  height: auto;}.a1_img1 {  width: 100%;  height: 100%;}.a_div1 {  width: 100%;  height: 100%;  overflow: hidden;}.mask {  position: absolute;  top: 30%;  width: 100%;  height: 70%;  opacity: 1;  background: linear-gradient(rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.3) 70%);}.row1_col2 {  width: 403.24px;  height: auto;  position: relative;  overflow: hidden;  z-index: 3;  /* border: 2px solid sienna; */}.col2_displacement {  margin-left: 30px;}/* 从-30px到10px */.a_div2 {  width: 90%;  height: auto;  padding: 0% 5%;  bottom: -30px;  position: absolute;  display: inline-block;  left: 0px;  /* border: 1px solid purple; */  text-align: left;}.div2_title {  font-size: 1em;  line-height: 1.0em;  margin-bottom: 10px;  color: white;}.div2_info {  font-size: 1.3em;  line-height: 1.4em;  font-weight: 600;  margin-bottom: 10px;  color: white;}.div2_info2 {  font-size: 1em;  line-height: 1.0em;  margin-bottom: 20px;  color: rgb(198, 199, 199);}.div2_hidden {  color: white;  height: 20px;  line-height: 20px;  visibility: visible;  margin-bottom: 10px;}

1.3 知识补充

在写这个效果的时候,我遇到了一个很大的问题,就是鼠标一旦离开这个框(如下)的位置,动画效果就会被取消。我尝试了各种方法都无济于事。起初我以为是子组件遮挡住了父组件导致,所以一度往如何让子组件彻底变成父组件的一部分上思考。但后来搜索Vue中的鼠标事件的时候,得到了解决。

原因是因为最开始我用了mouseout鼠标事件,而mouseout事件一旦离开父元素或者子元素都会触发,所以鼠标离开子元素的时候,也会触发父元素上的mouseout鼠标事件,但是mouseleave则不同,只有离开被选元素的时候,才会触发效果,这样遇到的问题就被完美解决了。

1.4 效果图

2 宣传海报

2.1 思路

这个实现起来很容易,”了解更多”按钮和父组件分别使用position:absolute , position:relative,然后”了解更多”按钮相对于父组件定位,利用top和left(或者bottom、right)定位,将其放置在合适的位置。

至于”了解更多”的悬浮效果,则通过:hover即可实现

2.2 代码

<div class="div_bill">      <img src="@/assets/sanwenyu.jpg" class="bill_img">      <button class="img_btn">了解更多</button></div>
.div_bill {  width: 100%;  margin-top: 7%;  height: auto;  position: relative;}.bill_img {  width: 100%;  height: auto;}.img_btn {  z-index: 100;  width: 170px;  height: 42px;  position: absolute;  border: 1px solid #ffffff;  left: 50.6%;  top: 65%;  color: #ffffff;  cursor: pointer;  /* opacity: 1; */  background-color: rgba(11, 11, 11, 0);}.img_btn:hover {  background-color: rgb(199, 0, 11);  border: 0px;  color: #fff;}

2.3 效果图

3 新闻与活动

3.1 思路

首先是分成三个组件,宽度为30%,中间两个间距分别为5%。

第一第二两个组件的形式一样,都是分成三大部分:展会活动、图片、内容信息。

其中展会活动很显然用到了相对父组件定位,图片和内容使用普通定位即可

另外,当鼠标悬浮上去的时候,图片会被拉近,而内容信息的颜色会变深一些。

当然这个也不是很难,大多数都是用过的知识。

对于第三个组件,相对复杂一些。所谓相对复杂,也不过是因为一个hover实现不了这个效果。因为如果用悬浮的话,要求两个字体的color都需要继承父组件,但是这样的话,就不能保证两个字体的颜色不同,所以需要用到一个鼠标事件,对两者的Dom进行操作实现。

3.2 代码

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3.3 效果图