限制地图显示范围

使用setLimitBounds限制地图的显示范围

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          <!doctype html>
<html>

<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
  <title>地图显示范围</title>
  <link rel="stylesheet" href="http://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" />
  <style>
    html,
    body,
    #container {
      width: 100%;
      height: 100%;
    }

    .lnglat {
      color: #0288d1;
    }
  </style>
</head>

<body>
  <div id="container"></div>
  <div class="info">
    <h4>地图限制区域信息</h4>
    <p>NorthEast坐标：<span id="ne" class="lnglat"></span></p>
    <p>SouthWest坐标：<span id="sw" class="lnglat"></span></p>
  </div>
  <div class="input-card" style="width:14rem;">
    <h4>限制地图显示范围</h4>
    <div class="input-item">
      <button class="btn" id="lock-bounds">限定地图显示范围</button>
    </div>
    <div class="input-item">
      <button class="btn" id="unlock-bounds">取消地图显示限制</button>
    </div>
  </div>
  <script src="http://webapi.amap.com/maps?v=1.4.15&key=您申请的key值"></script>
  <script src="http://a.amap.com/jsapi_demos/static/demo-center/js/demoutils.js"></script>
  <script>
    //创建地图
    var map = new AMap.Map('container', {
      resizeEnable: true,
      zoom: 11,
      showIndoorMap: false
    });

    function logMapInfo() {
      var limitBounds = map.getLimitBounds();
      if (limitBounds) {
        document.querySelector("#ne").innerText = limitBounds.northeast.toString();
        document.querySelector("#sw").innerText = limitBounds.southwest.toString();
      } else {
        document.querySelector("#ne").innerText = document.querySelector("#sw").innerText = "未限定";
      }
    }

    //限制地图显示范围
    function lockMapBounds() {
      var bounds = map.getBounds();
      map.setLimitBounds(bounds);
      logMapInfo();
    }

    //取消地图显示限制
    function unlockMapBounds() {
      map.clearLimitBounds();
      logMapInfo();
    }

    //启用地图范围限定
    lockMapBounds();
    logMapInfo();

    //绑定按钮事件
    document.querySelector("#lock-bounds").onclick = lockMapBounds;
    document.querySelector("#unlock-bounds").onclick = unlockMapBounds;
  </script>
</body>

</html>
        

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