图片大于div时的居中显示

当图片大于div时，想要图片居中显示，若是图片等比例缩小可能会致使图片不能填充整个div，若是直接将图片不设置宽高，将其外层div设置overflow:hidden；这时即便外层div设置了水平垂直居中，图片也不是居中的效果：

解决方法：

1-       把图片设置为背景图片

<div class="face-img-contain" id="face-img-back">
 </div>

 

.face-img-contain{
    width:348px;
    height:436px;
    margin:0 auto;
    margin-top: 14px;
    position: relative;
    background-image: url(../images/face-img/test-22.png); 
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid gainsboro;
}

 

如果后台返回的地址，别忘了拼接方法正确
$("#face-img-back").css("background-image","url("+faceImg+")");

 

2-       给图片设置相对div的100%的宽高，再设置object-fit:cover;

 

<div class="face-img-contain-new-new">
    <img src="../images/face-img/test-22.png" alt="" class="face-img-defined1" id="face-img-photo">
</div>

.face-img-contain-new-new{
    width:348px;
    height:436px;
    margin:0 auto;
    margin-top: 14px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border: 1px solid gainsboro;
}
.face-img-defined1{
    width:100%;
    height:100%;
    object-fit: cover;
}

 

。。。。。。