Using JavaScript and Tencent Maps to implement map bus transfer function

Using JavaScript and Tencent Maps to implement the map bus transfer function

The map bus transfer function is becoming more and more important in today’s life. Whether traveling in a new city or daily commuting, we all need a convenient and practical bus transfer function to help us plan our travel routes. In this article, we will introduce how to use JavaScript and Tencent Maps to implement the map bus transfer function, and provide specific code examples.

To implement the map bus transfer function, we first need to introduce the API of Tencent Maps. It can be introduced by adding the following code to the head of the HTML document:

<script src="https://map.qq.com/api/js?v=2.exp&libraries=place,transit"></script>

Next, we need to create a map container and initialize the map. You can add the following code to the body tag of the HTML document:

<div id="mapContainer" style="width: 100%; height: 500px;"></div>
<script>
  var map = new qq.maps.Map(document.getElementById("mapContainer"), {
    center: new qq.maps.LatLng(39.92, 116.46),
    zoom: 12
  });
</script>

In the above code, we created a div element with the ID mapContainer as the map container. We use the qq.maps.Map class to create a map instance and initialize it to a specified center point coordinate and zoom level. In this example, we set the map center to Beijing and set the zoom level to 12.

Now that we have a basic map, the next step is to implement the bus transfer function. We first need to add the input boxes and confirmation buttons for the starting point and end point to the page to allow users to enter their own starting point and end point information. You can add the following code to the body tag of the HTML document:

<div>
  <input type="text" id="startInput" placeholder="请输入起点">
  <input type="text" id="endInput" placeholder="请输入终点">
  <button onclick="search()">确认</button>
</div>

Next, we need to write a search function that will get the starting and ending text from the input box and pass it to Tencent Maps bus transfer service to get transfer plans. You can add the following code to the JavaScript script:

function search() {
  var start = document.getElementById("startInput").value;
  var end = document.getElementById("endInput").value;

  var transitService = new qq.maps.TransitService({
    location: "北京",
    complete: function(result) {
      var lines = result.detail.lines;
      for (var i = 0; i < lines.length; i++) {
        var line = lines[i];
        console.log(line.name); // 输出公交线路名
      }
    }
  });

  transitService.search(start, end);
}

In the above code, we first obtain the text content of the start and end input boxes. Then, we created a qq.maps.TransitService instance and set the map location to Beijing. In the complete callback function, we can process the returned transfer plan data. In this example, we simply print the name of the bus line on the console.

Finally, let us associate the search function with the confirmation button. You can add the following code to the button tag of the HTML document:

<button onclick="search()">确认</button>

At this point, we have completed the code example of using JavaScript and Tencent Maps to implement the map bus transfer function. By inputting the starting point and end point, we can use Tencent Maps' bus transfer service to obtain the transfer plan and process the returned data. In practical applications, we can further optimize the code, such as adding functions such as error handling and display of transfer plans.

To sum up, JavaScript and Tencent Maps provide powerful functions to realize map bus transfer. By using Tencent Maps' API and combining it with JavaScript programming capabilities, we can easily implement a fully functional map bus transfer application to provide users with convenient travel planning.

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