css - UC手机浏览器下如何让div水平垂直居中。

Question

UC浏览器在宽高固定下，margin:auto，上下左右0；不能水平垂直居中是什么原因？

CSS#globalTip{
    position: fixed;
    left: 0;
    right: 0;
    top:0;
    bottom:0;
    z-index: 99999;
    width:75%;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: #000;
    color:#fff;
    font-size: 1.6rem;
    border-radius: 20px;
}

如果position:absolute就可以，但这并不是我想要的。

Answer 1

display: table-cell;
vertical-align: middle;

Answer 2

I later changed to another horizontal and vertical writing method

css#globalTip{
    position: fixed;
    left:50%;
    top:50%;
    z-index: 99999;
    margin-left: -35%;
    margin-top:-25px;
    width:75%;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: nth($theme-color,1);
    color:#fff;
    font-size: 1.6rem;
    border-radius: 20px;
}

But I still want to know how to solve the bug in UC Browser using the original writing method

Answer 3

Use in absolute and fixed positioning modes

#globalTip{
    position: fixed;
    left:50%;
    top:50%;
    -webkit-transform:translate3d(-50%,-50%,0);
    transform:translate3d(-50%,-50%);
}

Answer 4

I also encountered the same problem
Horizontal and vertical centering under uc does not matter
Solution

.box{
    display: flex;
    justify-content: center;
    align-items: center;
}