iOS10 position + flex - Githubissues

绝对定位或者固定定位时，一定要设置两个方向的值（top,left）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        html, body {
            margin: 0;
            padding: 0;
        }
        .outer {
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .inner {
            width: 90%;
            height: 30%;
            top: 15%;
            left: 5%; // 如果不设置left, iOS10.3中会不居中（inner div的左侧在中央）
            position: absolute;
            background-color: red;
        }
    </style>
</head>
<body>
    <div class="outer">
        <div class="inner"></div>
    </div>
</body>
</html>

OPY-bbt / OPY-bbt.github.io

iOS10 position + flex #25