如何在按下clear按钮时禁用google地图上的手绘

<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY"></script>

<button id="clearButton">Clear</button>

var clearButton = document.getElementById('clearButton');
clearButton.addEventListener('click', clearDrawing);

function clearDrawing() {
  // 获取Google地图上的绘图工具
  var drawingManager = new google.maps.drawing.DrawingManager();

  // 禁用绘图工具
  drawingManager.setDrawingMode(null);
}

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    center: {lat: 37.7749, lng: -122.4194}, // 设置地图中心点坐标
    zoom: 12 // 设置地图缩放级别
  });

  // 将绘图工具添加到地图上
  var drawingManager = new google.maps.drawing.DrawingManager({
    map: map
  });
}