如何在div中垂直对齐图像

 .parent {
  align-items: center; /* For vertical align */
  background: red;
  display: flex;
  height: 250px;
  /* justify-content: center; <- for horizontal align */
  width: 250px;
} 

 <div class="parent">
  <img class="child" src="https://cdn2.iconfinder.com/data/icons/social-icons-circular-black/512/stackoverflow-128.png" />
</div> 

.frame {
    display: flex;
    align-items: center;
}

 .frame{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
} 

 <div class="frame" style="height: 25px;">
    <img src="http://jsfiddle.net/img/logo.png" />
</div> 

<div class="wrap">
    <img src="#">
</div>

.wrap {
    display: flex;
}
.wrap img {
    object-fit: contain;
}

.frame {
    height: 35px;      /* Equals maximum image height */
    width: 160px;
    border: 1px solid red;
    text-align: center;
    margin: 1em 0;
    display: table-cell;
    vertical-align: middle;
}
img {
    background: #3A6F9A;
    display: block;
    max-height: 35px;
    max-width: 160px;
}

*:first-child+html img {
    position: relative;
    top: expression((this.parentNode.clientHeight-this.clientHeight)/2+"px");
}

.frame {
    height: 25px;      /* Equals maximum image height */
    line-height: 25px;
    width: 160px;
    border: 1px solid red;
    
    text-align: center; 
    margin: 1em 0;
    position: relative; /* Changes here... */
}
img {
    background: #3A6F9A;
    max-height: 25px;
    max-width: 160px;
    top: 50%;           /* Here.. */
    left: 50%;          /* Here... */
    position: absolute; /* And here */
}    

$("img").each(function(){
    this.style.marginTop = $(this).height() / -2 + "px";
})

<div class="container">
    <div class="frame">
        <img src="http://jsfiddle.net/img/logo.png" class="img" alt="" />
    </div>
</div>

.container {
    display: table;
    float: left;
    border: solid black 1px;
    margin: 2px;
    padding: 0;
    background-color: black;
    width: 150px;
    height: 150px;
}
.frame {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
    border-width: 0;
}
.img {
    max-width: 150px;
    max-height: 150px;
    vertical-align: middle;
}

.frame {
    height: 25px;
    line-height: 25px;
    width: 160px;
    border: 1px solid #83A7D3;          
}
.frame img {
    background: #3A6F9A;
    display:inline-block;
    vertical-align: middle;
}

.frame {
    height: 25px;      /* Equals maximum image height */
    width: 160px;
    border: 1px solid red;
    position: relative;
    margin: 1em 0;
    top: 50%;
    text-align: center;
    line-height: 24px;
    margin-bottom: 20px;
}

img {
    background: #3A6F9A;
    vertical-align: middle;
    line-height: 0;
    margin: 0 auto;
    max-height: 25px;
}

    .frame {
        height: 25px;      /* Equals maximum image height */
        width: 160px;
        border: 1px solid red;
        margin: 1em 0;
        text-align: center;
        line-height: 22px;
        *:first-child+html line-height:24px; /* For Internet Explorer 7 */
    }

    img {
        background: #3A6F9A;
        vertical-align: middle;
        line-height: 0;    
        max-height: 25px;
        max-width: 160px;
    }
@media screen and (-webkit-min-device-pixel-ratio:0) {
    .frame {
        line-height:20px; /* WebKit browsers */
    }

div.img-container {
    display: table-cell;
    vertical-align: middle;
    height: 450px;
    width: 490px;
}

div.img-container img {
    max-height: 450px;
    max-width: 490px;
}

 .container {
    position: absolute;
    display: table;
    width: 100%;
    height: 100%;
}
.content {
    display: table-cell;
    vertical-align: middle;
} 

 <div class="container">
  <div class="content">
    <h1 style="text-align:center">Peace in the world</h1>
 </div>
</div> 

img {
    vertical-align: middle;
    display: inline-block;
    position: relative;
}

 .outer-frame {
  border: 1px solid red;
  min-height: 200px;
  text-align: center; /* Only to align horizontally */
}

.wrapper{
  line-height: 200px;
  border: 2px dashed blue;
  border-radius: 20px;
  margin: 50px
}

img {
  /* height: auto; */
  vertical-align: middle;   /* Only to align vertically */
} 

 <div class="outer-frame">
  <div class="wrapper">
    some text
    <img src="http://via.placeholder.com/150x150">
  </div>
</div> 

<style type="text/css">
    div.parent {
        position: relative;
    }

    img.child {
        bottom: 0;
        left: 0;
        margin: auto;
        position: absolute;
        right: 0;
        top: 0;
    }
</style>

<div class="parent">
    <img class="child">
</div>

 .loaderimage {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60px;
    height: 60px;
    margin-top: -30px; /* 50% of the height */
    margin-left: -30px;
 }

 .wrapper {
  position: relative;
  display: table;
  width: 300px;
  height: 200px;
}

.inside {
  vertical-align: middle;
  display: table-cell;
} 

 <div class="wrapper">
  <div class="inside">
    <p>Centre me please!!!</p>
  </div>
  <div class="inside">
    <img src="https://cdn2.iconfinder.com/data/icons/social-icons-circular-black/512/stackoverflow-128.png" />
  </div>
</div>  

 h2.h2red {
    color: red;
    font-size: 14px;
}
.mydivclass {
    margin-top: 30px;
    display: block;
}
img.mydesiredclass {
    margin-right: 10px;
    display: block;
    float: left; /* If you want to allign the text with an image on the same row */
    width: 100px;
    heght: 100px;
    margin-top: -40px /* Change this value to adapt to your page */;
} 

 <div class="mydivclass">
    <br />
    <img class="mydesiredclass" src="https://upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Wikipedia-logo-v2-en.svg/2000px-Wikipedia-logo-v2-en.svg.png">
    <h2 class="h2red">Text aligned after image inside a div by negative manipulate the img position</h2>
</div> 

.img-container {
  display: grid;
}

img { 
  align-self: center;
}

 .img-container {
  display: grid;
  grid-auto-flow: column; 
  background: #BADA55;
  width: 1200px;
  height: 500px;
}

img.vertical-align {
  align-self: center;
} 

 <div class="img-container">
  <img src="https://picsum.photos/300/300" />
  <img class="vertical-align" src="https://picsum.photos/300/300" />
  <img src="https://picsum.photos/300/300" />
</div> 

.img-container {
  display: grid;
  align-items: center;
}

 .img-container {
  display: grid;
  grid-auto-flow: column;
  align-items: center;
  background: #BADA55;
  width: 1200px;
  height: 500px;
} 

 <div class="img-container">
  <img src="https://picsum.photos/300/300" />
  <img src="https://picsum.photos/300/300" />
  <img src="https://picsum.photos/300/300" />
</div> 

.block{
    /* Decor */
    padding:0 20px;
    background: #666;
    border: 2px solid #fff;
    text-align: center;
    /* Important */
    min-height: 220px;
    width: 260px;
    white-space: nowrap;
}
.block:after{
    content: '';
    display: inline-block;
    height: 220px; /* The same as min-height */
    width: 1px;
    overflow: hidden;
    margin: 0 0 0 -5px;
    vertical-align: middle;
}
.block span{
    vertical-align: middle;
    display: inline-block;
    white-space: normal;
}