Use JSSDK to obtain geographical location from web pages
Copy a copy of the JSSDK environment and create an index.html file. The structure is as shown in Figure 7.1.
Figure 7.1 Section 7.1 File Structure
In location.js, encapsulate the "getLocation" interface as follows:
01 wxJSSDK.location = function(locationApi){
02 if(wxJSSDK.isReady){ //wxJSSDK.isReady 查看微信JSSDK是否初始化完毕
03 if(locationApi){
04 locationApi.getLocation && wx.getLocation({ //获取地理位置接口
05 success: function (res) {
06 locationApi.getLocation.success &&
07 locationApi.getLocation.success(res);
08 }
09 });
10 }else{
11 console.log("缺少配置参数");
12 }
13 }else{
14 console.log("抱歉，wx没有初始化完毕，请等待wx初始化完毕，再调用位置接口服
15 务。");
16 }
17 }In the index.html file, add the "Get geographical location" button and display the location information after acquisition. The code structure is as follows:
01 <!DOCTYPE html>
02 <html lang="en">
03 <head>
04 <metacharset="UTF-8">
05 <meta name="viewport" content="width=device-width,initial-scale=1.0,
06 minimum-scale=1, maximum-scale=1.0,user-scalable=no">
07 <title>第7章 7.1节 位置操作接口</title>
08 <!--依赖文件：jQuery-->
09 <script src="./js/jquery-1.11.2.min.js?1.1.10"></script>
10 <!--依赖文件：微信的JSSDK源文件-->
11 <scriptsrc="http://res.wx.qq.com/open/js/jweixin-1.0.0.js?1.1.10"></script>
12 <!--依赖文件：coolie-->
13 <script src="./js/cookie.js?1.1.10"></script>
14 <!--JSSDK的环境-->
15 <script src="./js/wxJSSDK.js?1.1.10"></script>
16 <!--引入检测API的位置服务-->
17 <script src="location.js?1.1.10"></script>
18 <style>
19 input{
20 width: 100%;
21 padding: 0.2em;
22 background-color: #5eb95e;
23 font-size: 1.4em;
24 background-image: linear-gradient(to bottom, #62c462, #57a957);
25 background-repeat: repeat-x;
26 color: #ffffff;
27 text-align: center;
28 text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
29 border-radius: 0.3em;
30 }
31 #info{
32 border-left: 3px solid#03a9f4;
33 background-color: #5eb95e;
34 color: #ffffff;
35 border-radius: 0.3em;
36 text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
37 }
38 </style>
39 </head>
40 <body>
41 <h1 id="">:)</h1>
42 <b style="font-size: 3em">位置操作接口！</b><br/><br />
43 <div id="info">
44 <p>纬度：<em id="latitude">无</em></p>
45 <p>经度：<em id="longitude">无</em></p>
46 <p>速度：<em id="speed">无</em></p>
47 <p>位置精度：<em id="accuracy">无</em></p>
48 </div>
49 <input type="button" value="获取当前地理位置信息" id="getLocation" />
50 </body>
51 </html>
Then add the response event in location.js, the code is as follows:
01 window.onload = function(){
02 var latitude,longitude, speed ,accuracy; // 位置信息初始变量
03 $("#getLocation").click(function(){ // 获取地理位置接口
04 wxJSSDK.location({
05 getLocation:{
06 success:function (res) {
07 latitude = res.latitude; // 纬度，浮点数，范围为90 ~ -90
08 $("#latitude").html(latitude);
09 longitude = res.longitude; // 经度，浮点数，范围为180 ~ -180。
10 $("#longitude").html(longitude);
11 speed = res.speed; // 速度，以米/每秒计
12 $("#speed").html(speed);
13 accuracy = res.accuracy; // 位置精度
14 $("#accuracy").html(accuracy);
15 }
16 }
17 });
18 });
19 }
Finally, remember to add the "getLocation" API permissions to the JSSDK configuration environment.
[Code Explanation]
After the location of "getLocation" is successful, the relevant information of "Latitude", "Longitude", "Speed" and "Position Accuracy" will be returned. After clicking the "Get Location" button, WeChat will pop up a prompt message, as shown in Figure 7.2. The result after successfully obtaining the location service is shown in Figure 7.3.
Figure 7.2 WeChat JSSDK prompt for obtaining location information
Figure 7.3 Information about successful location service acquisition
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