我使用Phonegap创建了一个Android应用。我希望能够在一个页面中使用固定的div并放大另一个页面。
我使用jquery mobile 1.2.0,Jquery 1.8.2,Phonegap 2.0.0和Android 2.2。
我的代码是:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>My Phonegap Application</title>
<link rel="stylesheet" href="./lib/jquery.mobile-1.2.0.css" />
<script src="./lib/jquery-1.8.2.js"></script>
<script src="./lib/jquery.mobile-1.2.0.js"></script>
<script src="./lib/cordova-2.0.0.js" type="text/javascript"></script>
<meta id="viewport" name="viewport" content="initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, width=device-width, height=device-height, user-scalable=no, target-densitydpi=device-dpi" />
<script>
function change_page(){
$("#viewport").attr("content", "initial-scale=1, maximum-scale=2, minimum-scale=0.5, width=device-width, height=device-height, user-scalable=yes, target-densitydpi=device-dpi");
$.mobile.changePage( "#pageImage", { transition: "slideup"} );
}
</script>
<style>
.fixe {
position: fixed;
bottom: 0;
z-index: 5000;
margin: 0;
padding: 0;
height: 50px;
width: 100%;
}
img {
height: 100%;
width: 100%;
}
</style>
</head>
<body>
<div data-role="page" id="pageHome">
<div data-role="content" data-theme="c">
<button id="switchPage" onClick='change_page();'>switchpage</button>
<p>
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</p>
<div class="fixe">
<img id="fixedImage" src="./res/myfixedimg.png">
</div>
</div>
</div>
<div data-role="page" id="pageImage">
<div data-role="content" data-theme="a">
<img id="my_img" src="./res/myimg.png" width="671" height="811">
</div>
</div>
</body>
</html>
使用此代码,固定div正在工作,但无法放大第二页。 如您所见,我在Javascript代码中更改了视口的用户可伸缩属性,但它似乎没有生效。
如果在视口元标记中删除“user-scalable = no”,则可以放大第二页但不修复div。
我还试图摆脱元标记中的用户可扩展性。在第一页中,我添加了:
$("#viewport").attr("content", "user-scalable=no, initial-scale=1, maximum-scale=2, minimum-scale=0.5, width=device-width, height=device-height, target-densitydpi=device-dpi");
console.log($("#viewport").attr('content'));
在change_page函数中:
$("#viewport").attr("content", "user-scalable=yes, initial-scale=1, maximum-scale=2, minimum-scale=0.5, width=device-width, height=device-height, target-densitydpi=device-dpi");
console.log($("#viewport").attr('content'));
控制台中视口的参数是可以的,但即使user-scalable = yes,它也就像用户可伸缩=否。
我希望能够放大第二页并在第一页中使用固定的div。有人知道怎么做吗?
提前感谢您的帮助。
答案 0 :(得分:3)
快速回答
请勿停用user-scalable
,而是修改maximum-scale
长答案
我知道这是一段时间了,但如果其他人偶然发现这个问题,这就是解决方案。我希望你能看到这个。
如果您最初设置user-scalable=no
,那么无论您是通过javascript将属性更改回user-scalable=yes
,Android浏览器都会忽略它(不确定Firefox等)
相反,您应该将初始,最小和最大比例放在1.0,用户可扩展为1,然后在修改元标记时,只将最大比例更改为2.0。请参阅下文以获得澄清。
初始状态
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=1">
初始状态
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=2.0, maximum-scale=1.0, user-scalable=1">
<强>结论强>
现在,您可以通过播放最大比例来改变缩放功能,同时始终保持用户可扩展性为true。请注意,由于某种原因,Firefox会忽略此解决方法并允许用户进行缩放。考虑到Android上的Firefox有超过1000万次下载,这很糟糕。