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- <h1><a name="plus.orientation">orientation</a></h1>
- <p>Orientation模块管理设备的方向信息,包括alpha、beta、gamma三个方向信息,通过plus.orientation可获取设备方向管理对象。</p>
- <h2>方法:</h2>
- <ul>
- <li>
- <a href="#plus.orientation.getCurrentOrientation">getCurrentOrientation</a>: 获取当前设备的方向信息,包括alpha、beta、gamma三个方向信息</li>
- <li>
- <a href="#plus.orientation.watchOrientation">watchOrientation</a>: 监听设备方向信息的变化</li>
- <li>
- <a href="#plus.orientation.clearWatch">clearWatch</a>: 关闭监听设备方向信息</li>
- </ul>
- <h2>对象:</h2>
- <ul>
- <li>
- <a href="#plus.orientation.OrientationOption">OrientationOption</a>: JSON对象,监听设备方向感应器参数</li>
- <li>
- <a href="#plus.orientation.Rotation">Rotation</a>: JSON对象,设备方向信息数据</li>
- </ul>
- <h2>回调方法:</h2>
- <ul>
- <li>
- <a href="#plus.orientation.OrientationSuccessCallback">OrientationSuccessCallback</a>: 获取设备方向信息成功的回调函数</li>
- <li>
- <a href="#plus.orientation.OrientationErrorCallback">OrientationErrorCallback</a>: 获取设备方向信息失败的回调函数</li>
- </ul>
- <h2>权限:</h2>
- <p>5+功能模块(permissions)</p>
- <pre class="prettyprint linenums">
- {
- // ...
- "permissions":{
- // ...
- "Orientation": {
- "description": "方向传感器"
- }
- }
- }
- </pre>
- <h1><a name="plus.orientation.OrientationOption">OrientationOption</a></h1>
- <p>JSON对象,监听设备方向感应器参数</p>
- <h2>属性:</h2>
- <ul><li>frequency: <em>(<font class="type">Number</font>
- 类型
- )</em>更新方向信息的时间间隔<br><p>数值类型,单位为ms,默认值为500ms。</p>
- </li></ul>
- <h1><a name="plus.orientation.Rotation">Rotation</a></h1>
- <p>JSON对象,设备方向信息数据</p>
- <pre class="prettyprint linenums">
- interface Rotation {
- readonly attribute float alpha;
- readonly attribute float beta;
- readonly attribute float gamma;
- readonly attribute float magneticHeading;
- readonly attribute float trueHeading;
- readonly attribute float headingAccuracy;
- }
- </pre>
- <h2>属性:</h2>
- <ul>
- <li>alpha: <em>(<font class="type">float</font>
- 类型
- )</em>以z方向为轴心的旋转角度<br><p>浮点数类型,只读属性,取值范围为0到360(不等于360)。</p>
- </li>
- <li>beta: <em>(<font class="type">float</font>
- 类型
- )</em>以x方向为轴心的旋转角度<br><p>浮点数类型,只读属性,取值范围为-180到180(不等于180)。</p>
- </li>
- <li>gamma: <em>(<font class="type">float</font>
- 类型
- )</em>以y方向为轴心的旋转角度<br><p>浮点数类型,只读属性,取值范围为-180到180(不等于180)。</p>
- </li>
- <li>magneticHeading: <em>(<font class="type">float</font>
- 类型
- )</em>设备方向与地球磁场北极方向的角度<br><p>浮点数类型,只读属性,取值范围为0到360(不等于360)。</p>
- </li>
- <li>trueHeading: <em>(<font class="type">float</font>
- 类型
- )</em>设备方向与地球真实北极方向的角度<br><p>浮点数类型,只读属性,取值范围为0到360(不等于360)。</p>
- </li>
- <li>headingAccuracy: <em>(<font class="type">float</font>
- 类型
- )</em>设备方向值的误差值<br><p>浮点数类型,只读属性,取值范围为0到360(不等于360)。</p>
- </li>
- </ul>
- <h1><a name="plus.orientation.OrientationSuccessCallback">OrientationSuccessCallback</a></h1>
- <p>获取设备方向信息成功的回调函数</p>
- <pre class="prettyprint linenums">
- void onSuccess( rotation ){
- // Get orientation success code.
- }
- </pre>
- <h2>参数:</h2>
- <ul><li>rotation:
- <em>(
- <font class="type">DOMString</font>
- )
- 必选 </em>设备的方向信息Rotation<br>
- </li></ul>
- <h2>返回值:</h2>
- <font class="type">void</font>
- : 无<h1><a name="plus.orientation.OrientationErrorCallback">OrientationErrorCallback</a></h1>
- <p>获取设备方向信息失败的回调函数</p>
- <pre class="prettyprint linenums">
- void onError( error ) {
- // Get orientation error code.
- }
- </pre>
- <h2>参数:</h2>
- <ul><li>error:
- <em>(
- <font class="type">DOMException</font>
- )
- 必选 </em>失败信息<br>
- </li></ul>
- <h2>返回值:</h2>
- <font class="type">void</font>
- : 无<br><br>
- </div></body>
- </html>
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