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，如果图片等比例缩小可能会导致图片不能填充整个div，如果直接将图片不设置宽高，将其外层div设置overflow:hidden；这时即使外层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

1 2	<div class="face-img-contain" id="face-img-back">  </div>

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.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; }

1 2	若是后台返回的地址，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;

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<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; }