移动端H5强制页面横屏展示

小咪咪 2022-12-27 02:15 776阅读 0赞

接到一个H5小游戏的需求，需要强制H5横屏显示；大概效果如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNzI1NDUw_size_16_color_FFFFFF_t_70][]

**实现原理利用transform将这个父容器在竖屏状态下整体顺时针旋转90º，页面就处于横屏的状态。但是因为旋转元素的基点默认为本身的中心点。所以我们设置一下它的旋转中心为左上角（transform-origin: 0% 0%；），这样页面被“转出了屏幕”停留在屏幕的左侧，最后一步只需要将它往右平移一个屏幕的宽度就刚刚好（left：100vw）。**

**完整的实现代码如下：**

<!DOCTYPE html>
    <html>
    	<head>
    		<meta charset="UTF-8">
    		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    		<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
    		<meta http-equiv="Pragma" content="no-cache" />
    		<meta http-equiv="Expires" content="0" />
    		<meta http-equiv="X-UA-Compatible" content="ie=edge">
    		<style type="text/css">
    			body {
    				position: fixed;
    				width: 100%;
    				height: 100%;
    				padding: 0;
    				margin: 0;
    				overflow: hidden;
    			}
    
    			#main {
    				width: 560px;
    				height: 320px;
    			}
    
    			@media screen and (orientation: portrait) {
    
    				#main {
    					position: absolute;
    					width: 100vh;
    					height: 100vw;
    					top: 0;
    					left: 100vw;
    					-webkit-transform: rotate(90deg);
    					-moz-transform: rotate(90deg);
    					-ms-transform: rotate(90deg);
    					transform: rotate(90deg);
    					transform-origin: 0% 0%;
    				}
    			}
    
    			@media screen and (orientation: landscape) {
    				#main {
    					position: absolute;
    					top: 0;
    					left: 0;
    					width: 100vw;
    					height: 100vh;
    				}
    			}
    		</style>
    	</head>
    	<body>
    		<body>
    			<div id="main">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptatem deserunt obcaecati nisi praesentium ipsa adipisci hic culpa a voluptates tenetur nulla animi! Suscipit cumque delectus labore et animi laboriosam voluptas!</div>
    		</body>
    		<script type="text/javascript" language="javascript" src="./vconsole.min.js"></script>
    	</body>
    </html>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNzI1NDUw_size_16_color_FFFFFF_t_70]: /images/20221120/30331b136f2c41aaa4731b99c61d1669.png