php - 使用 EgMap 获取用户地理定位

Question

我目前正在使用 the EGmap extension for Yii .并且想知道如何在 map 加载时获取用户当前的地理位置？

这是我的代码:

Yii::app()->clientScript->registerScript('filterscript',"
        if(navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(function(position) {
      initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
      alert(initialLocation)
      //map.setCenter(initialLocation);
    }, function() {
      alert(initialLocation); //alerts the lat lng
    });
  }
  // Browser doesn't support Geolocation
  else {
    alert('fail');
  }
  ",CClientScript::POS_READY);

    Yii::import('ext.EGMap.*');

            $gMap = new EGMap();
            $gMap->zoom = 5;
            $gMap->width = '100%';
            $gMap->height = 200;

            $mapTypeControlOptions = array(
                'position'=> EGMapControlPosition::RIGHT_TOP,
                'style'=>EGMap::MAPTYPECONTROL_STYLE_DEFAULT,
            );

            $gMap->mapTypeId = EGMap::TYPE_HYBRID;

            $gMap->mapTypeControlOptions= $mapTypeControlOptions;

            // Create geocoded lat and lng here
            $lat = $lng =''; 

            // Center the map on geocoded address
            $gMap->setCenter($lat, $lng);

            // Add marker on geocoded address
            $gMap->addMarker(
                new EGMapMarker($lat, $lng)
            );

            $gMap->renderMap();

如果不使用扩展程序，请使用它使其工作。 (tutorial from google map api page)

  var map = new google.maps.Map(document.getElementById("map-canvas"), myOptions);

  // Try W3C Geolocation (Preferred)
  if(navigator.geolocation) {
    browserSupportFlag = true;
    navigator.geolocation.getCurrentPosition(function(position) {
      initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
      map.setCenter(initialLocation);
    }, function() {
      handleNoGeolocation(browserSupportFlag);
    });
  }
  // Browser doesn't support Geolocation
  else {
    browserSupportFlag = false;
    handleNoGeolocation(browserSupportFlag);
  }

我如何将用户的经纬度标记放在 map 上，因为它是从扩展程序外部完成的？我做得对吗？

Answer 1

首先设置jsName:

$gMap->setJsName('test_map');

然后将 afterInit 代码添加到 renderMap 调用中，包括上一步中的名称:

$script = "
        if(navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(function(position) {
      initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
      alert(initialLocation)
      test_map.setCenter(initialLocation); // <-- HERE: put name from setJsName() call
    }, function() {
      alert(initialLocation); //alerts the lat lng
    });
  }
  // Browser doesn't support Geolocation
  else {
    alert('fail');
  }
  ";

第一个参数是附加初始化脚本的数组:

$gMap->renderMap(array($script));

免责声明:未经测试，但应该为您指明正确的方向:)