我正在phonegap上开发一个iphone应用程序,我使用jQuery移动。我想在一个页面上实现一个简单的功能,就像在我的html页面上按下一个按钮,检查我是否有互联网连接。如果我做了,然后继续下一页,否则,显示错误页面。
包含库:
<link rel="stylesheet" type="text/css" href="lib/jquery.mobile-1.0b1.min.css" />
<script type="text/javascript" src="lib/jquery-1.6.1.js"></script>
<script type="text/javascript" charset="utf-8" src="phonegap.0.9.5.1.min.js"></script>
<script type="text/javascript" src="functionality.js"></script>
<script type="text/javascript" src="lib/jquery.mobile-1.0b1.min.js"></script>
我的page1.html代码是:
<a href = "#map_page" id='map_button' data-role="button" onclick = "connection();">Go!</a>
现在function .js文件包含了connection()函数,该函数是根据phonegap的docs编写的:
function connection(){
alert('checking...');
// check if there is internet connection
navigator.network.isReachable("google.com", isNetworkAvailable, {});
}
function isNetworkAvailable(status) {
var networkState = status.code;
alert('Connection Type ' + networkState + ' - ' + status.message); }
问题是,我从来没有得到连接()函数,甚至当我使用以下脚本在我的html页面:
$ (" # map_button")。点击(函数(事件){checkConnection ()});
我已经在这段代码上工作了好几天了,但还是没能使它工作。
我也有麻烦检查连接,但发现了使用var networkState = navigator.network.connection.type的替代方法;我的实现方式非常不同,将一个切换函数绑定到所有链接。因为它可能对deviceReady方法感兴趣,所以我将所有链接绑定到调用一个函数,该函数将决定该链接是否需要连接检查。跳转到第二个函数进行连接!
function onDeviceReady()
{
//Bind all links and intercept them before they go anywhere //I'm jquery dependant
$('a').bind('click', function(event) {
switch($(this).attr('id'))//using the id value of the link we help us decide what kidn of action we are doing
{
case "data-loader-page":
return event;
break;
case "load-version-data": //I'm about to pull JSON data from a server
if(!checkConnection()){return false}; //check for connection and exit if it fails.
doJSON(); //at this point we have a connection so go get remote data.
return false;
break;
//for un-handled links we will assume that you just want to hash bang
default: return event;
}
});
}
这个函数对我来说很好,如果你想的话,你可以在你的onclick事件上调用它。它也不依赖于jquery
function checkConnection() {
var networkState = navigator.network.connection.type;
var states = {};
states[Connection.UNKNOWN] = 'Unknown connection';
states[Connection.ETHERNET] = 'Ethernet connection';
states[Connection.WIFI] = 'WiFi connection';
states[Connection.CELL_2G] = 'Cell 2G connection';
states[Connection.CELL_3G] = 'Cell 3G connection';
states[Connection.CELL_4G] = 'Cell 4G connection';
states[Connection.NONE] = 'No network connection';
if(states[networkState]==states[Connection.NONE] || states[networkState]==states[Connection.UNKNOWN]){
alert('A network connection is required to access this page.');
return false;
} else {
return true;
}
}
我是jquery/jquery移动依赖
<div data-role="page" data-theme="b" id="sql-manager-page">
<div data-role="header">
<h1>SQL Manager</h1>
</div>
<div data-role="content">
<ul data-role="listview">
<li><a href="#data-loader-page" id="data-loader-page">Data Loader</a></li>
<li><a href="#load-version-data" id="load-version-data" rel="external">Load version data</a></li>
</ul>
</div>
<div data-role="footer">
<h4> <a href="#privacy-page">Privacy</a></h4>
</div>
</div>
不是我知道的最优雅的例子,但我希望这对你有帮助;
您是否尝试过将您的HTML更改为:
<a href="#map_page" id='map_button' data-role="button" onclick="connection">Go!</a>
没有()
?通常,如果您添加()
,它将执行该函数并将其替换为该函数的返回值。不过,我不是100%肯定在HTML的onclick属性中会发生这种情况。值得一试。
您的第二次尝试看起来像错误的函数名称,checkConnection()
vs connection()