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diff --git a/files/zh-cn/web/api/geolocation/watchposition/index.html b/files/zh-cn/web/api/geolocation/watchposition/index.html new file mode 100644 index 0000000000..e2170f685f --- /dev/null +++ b/files/zh-cn/web/api/geolocation/watchposition/index.html @@ -0,0 +1,145 @@ +--- +title: Geolocation.watchPosition() +slug: Web/API/Geolocation/watchPosition +translation_of: Web/API/Geolocation/watchPosition +--- +<p>{{ APIref("Geolocation API") }}</p> + +<p><strong><code>Geolocation.watchPosition()</code></strong> 用于注册监听器,在设备的地理位置发生改变的时候自动被调用。也可以选择特定的错误处理函数。</p> + +<p>该方法会返回一个 ID,如要取消监听可以通过 {{domxref("Geolocation.clearWatch()")}} 传入该 ID 实现取消的目的。</p> + +<h2 id="语法">语法</h2> + +<pre class="syntaxbox"><em>id</em> = navigator.geolocation.watchPosition(<em>success[</em>, <em>error[</em>, <em>options]]</em>)</pre> + +<h3 id="参数">参数</h3> + +<dl> + <dt><em>success</em></dt> + <dd>成功时候的回调函数, 同时传入一个 {{domxref("Position")}} 对象当作参数。</dd> + <dt><em>error</em> {{optional_inline}}</dt> + <dd>失败时候的回调函数,可选, 会传入一个 {{domxref("PositionError")}} 对象当作参数。</dd> + <dt><em>options</em> {{optional_inline}}</dt> + <dd>一个可选的 {{domxref("PositionOptions")}} 对象。</dd> +</dl> + +<h2 id="示例">示例</h2> + +<pre class="brush: js">var id, target, options; + +function success(pos) { + var crd = pos.coords; + + if (target.latitude === crd.latitude && target.longitude === crd.longitude) { + console.log('Congratulations, you reached the target'); + navigator.geolocation.clearWatch(id); + } +} + +function error(err) { + console.warn('ERROR(' + err.code + '): ' + err.message); +} + +target = { + latitude : 0, + longitude: 0 +}; + +options = { + enableHighAccuracy: false, + timeout: 5000, + maximumAge: 0 +}; + +id = navigator.geolocation.watchPosition(success, error, options); +</pre> + +<h2 id="注意">注意</h2> + +<p>如果你的应用程序运行在 firefox OS 上,请参考下 <a href="/en-US/docs/Web/API/Geolocation/navigator.requestWakeLock()">geolocation wake lock</a> ,以便在屏幕关闭的时候,程序可以运行在后台以继续监听位置的变化。</p> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">规范</th> + <th scope="col">状态</th> + <th scope="col">说明</th> + </tr> + </thead> + <tbody> + <tr> + <td>{{SpecName('Geolocation', '#watch-position', 'Geolocation.watchPosition()')}}</td> + <td>{{Spec2('Geolocation')}}</td> + <td>Initial specification.</td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<p>{{ CompatibilityTable() }}</p> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Basic support</td> + <td>5</td> + <td>{{CompatGeckoDesktop("1.9.1")}}</td> + <td>9</td> + <td>10.60<br> + Removed in 15.0<br> + Reintroduced in 16.0</td> + <td>5</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Chrome for Android</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Mobile</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatUnknown()}}</td> + <td>{{CompatUnknown()}}</td> + <td>{{CompatGeckoMobile("4")}}</td> + <td>{{CompatUnknown()}}</td> + <td>10.60</td> + <td>{{CompatUnknown()}}</td> + </tr> + </tbody> +</table> +</div> + +<h2 id="sect1"> </h2> + +<h2 id="相关链接">相关链接</h2> + +<ul> + <li><a href="/en-US/docs/Web/API/Geolocation/navigator.requestWakeLock()">geolocation wake lock</a></li> + <li><a href="/en-US/docs/WebAPI/Using_geolocation" title="/en-US/docs/WebAPI/Using_geolocation">使用地理位置定位</a></li> + <li>该方法属于 {{domxref("Geolocation")}},可以通过 {{domxref("NavigatorGeolocation.geolocation")}} 访问。</li> + <li>取消监听的方法: {{domxref("Geolocation.clearWatch()")}}</li> + <li>另一个类似的方法: {{domxref("Geolocation.getCurrentPosition()")}}</li> +</ul> |