罗盘是一个检测设备方向或朝向的传感器,使用度作为衡量单位,取值范围从0度到359.99度。
avigator.compass.getCurrentHeading(compassSuccess, compassError, compassOptions);
<!DOCTYPE html>
<html>
<head>
<title>Compass Example</title>
<script type="text/javascript" charset="utf-8" src="phonegap.js"></script>
<script type="text/javascript" charset="utf-8">
// 等待加载PhoneGap
document.addEventListener("deviceready", onDeviceReady, false);
// PhoneGap加载完毕
function onDeviceReady() {
navigator.compass.getCurrentHeading(onSuccess, onError);
}
// onSuccess: 返回当前的朝向数据
function onSuccess(heading) {
alert('Heading: ' + heading);
}
// onError: 返回朝向数据失败
function onError() {
alert('onError!');
}
</script>
</head>
<body>
<h1>Example</h1>
<p>getCurrentHeading</p>
</body>
</html>
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