javascript - fitBounds 和 getZoom 表现不佳

Question

我有以下代码，在 map 初始化后几乎立即运行

function showAddress(address) {
    geocoder.geocode( { 'address': address}, function(results, status) {
      if (status == google.maps.GeocoderStatus.OK) {
        map.fitBounds(results[0].geometry.bounds);

        if (map.getZoom() < 12) {
            map.setZoom(12);
        }
      } else {
        alert("Geocode was not successful for the following reason: " + status);
      }
    });
  }

问题是缩放检查和设置不起作用。我已检查并启动了 map ，但此时 map.getZoom() 函数返回未定义。

我可以做些什么来强制它等待，直到设置了拟合边界并且知道缩放级别，以便我可以适本地控制缩放？

Answer 1

  // Define the Bounds Changed event handler to do a "once-only" zoom level check
  google.maps.event.addListener(map, 'bounds_changed', function() {
    InitialZoomCheck()
  });

geocoder.geocode( { 'address': address}, function(results, status) {
  if (status == google.maps.GeocoderStatus.OK) {
    map.fitBounds(results[0].geometry.bounds);




function InitialZoomCheck() {

  // Re-define the event handler so that this routine is called only once
  google.maps.event.addListener(map, 'bounds_changed', function() {
    document.posicion.z.value=map.getZoom()
  });

  if (map.getZoom() > 12) {
    map.setZoom (12);
  }
}