| auto | 默認(rèn)：viewprot-fit:contain;頁面內(nèi)容顯示在safe area內(nèi) |
| cover | viewport-fit:cover,頁面內(nèi)容充滿屏幕 |
viewport-fit meta標(biāo)簽設(shè)置(cover時(shí))
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover">
3.2 css constant()函數(shù) 與safe-area-inset-top &safe-area-inset-left &safe-area-inset-right &safe-area-inset-bottom的介紹
如上圖所示 在iOS 11中的WebKit包含了一個(gè)新的CSS函數(shù)constant()，以及一組四個(gè)預(yù)定義的常量：safe-area-inset-left,safe-area-inset-right,safe-area-inset-top和safe-area-inset-bottom。當(dāng)合并一起使用時(shí)，允許樣式引用每個(gè)方面的安全區(qū)域的大小。
3.1當(dāng)我們?cè)O(shè)置viewport-fit:contain,也就是默認(rèn)的時(shí)候時(shí);設(shè)置safe-area-inset-left,safe-area-inset-right,safe-area-inset-top和safe-area-inset-bottom等參數(shù)時(shí)不起作用的。
3.2當(dāng)我們?cè)O(shè)置viewport-fit:cover時(shí)：設(shè)置如下
body {
padding-top: constant(safe-area-inset-top); //為導(dǎo)航欄+狀態(tài)欄的高度 88px
padding-left: constant(safe-area-inset-left); //如果未豎屏?xí)r為0
padding-right: constant(safe-area-inset-right); //如果未豎屏?xí)r為0
padding-bottom: constant(safe-area-inset-bottom);//為底下圓弧的高度 34px
}
4. iPhoneX的適配---高度統(tǒng)計(jì)
viewport-fit:cover + 導(dǎo)航欄
5.iPhoneX的適配---媒體查詢
注意這里采用的是690px(safe area高度)，不是812px;
@media only screen and (width: 375px) and (height: 690px){
body {
background: blue;
}
}
6.iphoneX viewport-fit
問題總結(jié)
1.關(guān)于iphoneX 頁面使用了漸變色時(shí)；如果viewport-fit:cover;
1.1在設(shè)置了背景色單色和漸變色的區(qū)別，如果是單色時(shí)會(huì)填充整個(gè)屏幕，如果設(shè)置了漸變色 那么只會(huì)更加子元素的高度去渲染；而且頁面的高度只有690px高度，上面使用了padding-top:88px;
body固定為：
<body><div class="content">this is subElement</div></body>
1.單色時(shí)：
* {
padding: 0;
margin: 0;
}
body {
background:green;
padding-top: constant(safe-area-inset-top); //88px
/*padding-left: constant(safe-area-inset-left);*/
/*padding-right: constant(safe-area-inset-right);*/
/*padding-bottom: constant(safe-area-inset-bottom);*/
}
2.漸變色
* {
padding: 0;
margin: 0;
}
body {
background:-webkit-gradient(linear, 0 0, 0 bottom, from(#ffd54f), to(#ffaa22));
padding-top: constant(safe-area-inset-top); //88px
/*padding-left: constant(safe-area-inset-left);*/
/*padding-right: constant(safe-area-inset-right);*/
/*padding-bottom: constant(safe-area-inset-bottom);*/
}
解決使用漸變色 仍舊填充整個(gè)屏幕的方法；CSS設(shè)置如下
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1, viewport-fit=cover">
<title>Designing Websites for iPhone X: Respecting the safe areas</title>
<style> * {
padding: 0;
margin: 0;
}
html, body {
height: 100%;
}
body {
padding-top: constant(safe-area-inset-top);
padding-left: constant(safe-area-inset-left);
padding-right: constant(safe-area-inset-right);
padding-bottom: constant(safe-area-inset-bottom);
}
.content {
background: -webkit-gradient(linear, 0 0, 0 bottom, from(#ffd54f), to(#ffaa22));
width: 100%;
height: 724px;
} </style>
</head>
<body>
<div class="content">this is subElement</div>
</body>
</html>
2.頁面元素使用了固定定位的適配即：{position:fixed;}
2.1 子元素頁面固定在底部時(shí)；使用viewport-fit:contain時(shí);可以看到bottom:0時(shí)只會(huì)顯示在安全區(qū)域內(nèi)；
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1">
<!--<meta name="viewport" content="initial-scale=1, viewport-fit=cover">-->
<title>Designing Websites for iPhone X: Respecting the safe areas</title>
<style>
* {
padding: 0;
margin: 0;
}
/*html,body {*/
/*height: 100%;*/
/*}*/
body {
background: grey;
/*padding-top: constant(safe-area-inset-top);*/
/*padding-left: constant(safe-area-inset-left);*/
/*padding-right: constant(safe-area-inset-right);*/
/*padding-bottom: constant(safe-area-inset-bottom);*/
}
.top {
width: 100%;
height: 44px;
background: purple;
}
.bottom {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 44px;
color: black;
background: green;
}
</style>
</head>
<body>
<div class="top">this is top</div>
<div class="bottom">this is bottom</div>
</body>
</html>
2.1 子元素頁面固定在底部時(shí)；使用viewport-fit:cover時(shí);可以看到bottom:0時(shí)只會(huì)顯示在安全區(qū)域內(nèi)；
添加html,body {width:100%;heigth:100%}
圖1：
* {
padding: 0;
margin: 0;
}
html,body {
height: 100%;
}
body {
background: grey;
padding-top: constant(safe-area-inset-top);
padding-left: constant(safe-area-inset-left);
padding-right: constant(safe-area-inset-right);
padding-bottom: constant(safe-area-inset-bottom);
}
.top {
width: 100%;
height: 44px;
background: purple;
}
.bottom {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 44px;
color: black;
background: green;
}
圖2：
* {
padding: 0;
margin: 0;
}
html,body {
height: 100%;
}
body {
background: grey;
padding-top: constant(safe-area-inset-top);
padding-left: constant(safe-area-inset-left);
padding-right: constant(safe-area-inset-right);
/*padding-bottom: constant(safe-area-inset-bottom);*/
}
.top {
width: 100%;
height: 44px;
background: purple;
}
.bottom {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 44px;
color: black;
background: green;
}
2.3 關(guān)于alertView彈框 遮罩層的解決方案
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<!--<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">-->
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover">
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<title>alertView</title>
<script data-res="eebbk">
document.documentElement.style.fontSize = window.screen.width / 7.5 + 'px';
</script>
<style>
* {
margin: 0;
padding: 0;
}
html,body {
width: 100%;
height: 100%;
}
body {
font-size: 0.32rem;
padding-top: constant(safe-area-inset-top);
padding-left: constant(safe-area-inset-left);
padding-right: constant(safe-area-inset-right);
padding-bottom: constant(safe-area-inset-bottom);
}
.content {
text-align: center;
}
.testBut {
margin: 50px auto;
width: 100px;
height: 44px;
border: 1px solid darkgray;
outline:none;
user-select: none;
background-color: yellow;
}
</style>
<link href="alertView.css" rel="stylesheet" type="text/css">
</head>
<body>
<section class="content">
<button class="testBut" onclick="showLoading()">彈框加載</button>
</section>
<script type="text/javascript" src="alertView.js"></script>
<script>
function showLoading() {
UIAlertView.show({
type:"input",
title:"溫馨提示", //標(biāo)題
content:"VIP會(huì)員即將到期", //獲取新的
isKnow:false
});
var xx = new UIAlertView();
console.log(xx);
}
</script>
</body>
</html>
總結(jié)
以上所述是小編給大家介紹的有關(guān)HTML5頁面在iPhoneX適配問題，希望對(duì)大家有所幫助，如果大家有任何疑問請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)腳本之家網(wǎng)站的支持！
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