Javascript 如何更改Mapbox中的标记图像？

我对mapbox不熟悉。我在mapbox地图中更改标记图像时遇到问题。 我从我无法更改标记图像获得代码

这是我的密码：

var geojson = {
"type": "FeatureCollection",
"features": [
    {
        "type": "Feature",
        "properties": {
            "message": "IN",
            "iconSize": [30, 30]
        },
        "geometry": {
            "type": "Point",
            "coordinates":<?php echo $in; ?>
        }
    },
    {
        "type": "Feature",
        "properties": {
            "message": "Check IN",
            "iconSize": [30, 30]
        },
        "geometry": {
            "type": "Point",
            "coordinates":<?php echo $c; ?>
        }
    },
    {
        "type": "Feature",
        "properties": {
            "message": "OUT",
            "iconSize": [30, 30]
        },
        "geometry": {
            "type": "Point",
            "coordinates":<?php echo $o; ?>
        }
    }
    ]
};

geojson.features.forEach(function(marker) {

    var el = document.createElement('div');
    el.className = 'marker';
    el.style.backgroundImage = 'url(images/check_in.jpg)';
    el.style.width = marker.properties.iconSize[0] + 'px';
    el.style.height = marker.properties.iconSize[1] + 'px';

    el.addEventListener('click', function() {
        window.alert(marker.properties.message);
    });

    new mapboxgl.Marker(el, {offset: [-marker.properties.iconSize[0] / 2, -marker.properties.iconSize[1] / 2]})
        .setLngLat(marker.geometry.coordinates)
        .addTo(map);
});

var geojson={
“类型”：“FeatureCollection”，
“特点”：[
{
“类型”：“功能”，
“财产”：{
“消息”：“在”，
“iconSize”：[30,30]
},
“几何学”：{
“类型”：“点”，
“坐标”：
}
},
{
“类型”：“功能”，
“财产”：{
“消息”：“签入”，
“iconSize”：[30,30]
},
“几何学”：{
“类型”：“点”，
“坐标”：
}
},
{
“类型”：“功能”，
“财产”：{
“消息”：“退出”，
“iconSize”：[30,30]
},
“几何学”：{
“类型”：“点”，
“坐标”：
}
}
]
};
geojson.features.forEach（函数（标记）{
var el=document.createElement（'div'）；
el.className='marker'；
el.style.backgroundImage='url（images/check_in.jpg）'；
el.style.width=marker.properties.iconSize[0]+'px'；
el.style.height=marker.properties.iconSize[1]+'px'；
el.addEventListener（'click'，函数（）{
window.alert（marker.properties.message）；
});
新的mapboxgl.Marker（el，{offset:[-Marker.properties.iconSize[0]/2，-Marker.properties.iconSize[1]/2]}）
.setLngLat（标记、几何、坐标）
.addTo（地图）；
});

如果从他们的网站：

geojson.features.forEach(function(marker) {
    // create a DOM element for the marker
    var el = document.createElement('div');
    el.className = 'marker';
    el.style.backgroundImage = 'url(https://placekitten.com/g/' + marker.properties.iconSize.join('/') + '/)';
    el.style.width = marker.properties.iconSize[0] + 'px';
    el.style.height = marker.properties.iconSize[1] + 'px';

    el.addEventListener('click', function() {
        window.alert(marker.properties.message);
    });

    // add marker to map
    new mapboxgl.Marker(el, {offset: [-marker.properties.iconSize[0] / 2, -marker.properties.iconSize[1] / 2]})
        .setLngLat(marker.geometry.coordinates)
        .addTo(map);
});

---

我想你错过了

+marker.properties.iconSize.join（'/'）+'/'）在这部分：
el.style.backgroundImage='url(https://placekitten.com/g/'+marker.properties.iconSize.join（'/'）+'/'）
有关详细信息，请访问此页面

var geojson={
“类型”：“FeatureCollection”，
“特点”：[
{
“类型”：“功能”，
“财产”：{
“消息”：“在”，
“iconSize”：[30,30]
},
“几何学”：{
“类型”：“点”，
“坐标”：
}
},
{
“类型”：“功能”，
“财产”：{
“消息”：“签入”，
“iconSize”：[30,30]
},
“几何学”：{
“类型”：“点”，
“坐标”：
}
},
{
“类型”：“功能”，
“财产”：{
“消息”：“退出”，
“iconSize”：[30,30]
},
“几何学”：{
“类型”：“点”，
“坐标”：
}
}
],
“财产”：{
“图标”：{
“iconUrl”：https://www.mapbox.com/mapbox.js/assets/images/astronaut2.png",
“iconSize”：[50,50]，//图标的大小
“iconAnchor”：[25,25]，//对应于标记位置的图标点
“popupAnchor”：[0，-25]，//相对于iconAnchor打开弹出窗口的点
“类名称”：“点”
}
}
};

 var geojson = {
"type": "FeatureCollection",
"features": [
    {
        "type": "Feature",
        "properties": {
            "message": "IN",
            "iconSize": [30, 30]
        },
        "geometry": {
            "type": "Point",
            "coordinates":<?php echo $in; ?>
        }
    },
    {
        "type": "Feature",
        "properties": {
            "message": "Check IN",
            "iconSize": [30, 30]
        },
        "geometry": {
            "type": "Point",
            "coordinates":<?php echo $c; ?>
        }
    },
    {
        "type": "Feature",
        "properties": {
            "message": "OUT",
            "iconSize": [30, 30]
        },
        "geometry": {
            "type": "Point",
            "coordinates":<?php echo $o; ?>
        }
    }
],

"properties": {
      "icon": {
        "iconUrl": "https://www.mapbox.com/mapbox.js/assets/images/astronaut2.png",
        "iconSize": [50, 50], // size of the icon
        "iconAnchor": [25, 25], // point of the icon which will correspond to marker's location
        "popupAnchor": [0, -25], // point from which the popup should open relative to the iconAnchor
        "className": "dot"
      }
    }
};