javascript - Mapbox GL - 使用 map 样式在悬停时切换突出显示特定功能

Question

我想在鼠标悬停时突出显示包含在我的 map 样式中的图层的特定功能......像这样:

  map.on('mousemove', function(e) {
    var states = map.queryRenderedFeatures(e.point, {
     layers: ['n_Region6 Municipals']
    });
    if (states.length > 0) {      
      map.setPaintProperty('n_Region6 Municipals', 'fill-color',' 
      {"property":"NAME_2","type":"category","stops": + 
      [[states[0].properties.NAME_2 +,"blue"]]}');    
      });

将 setpaintproperty 与数据驱动功能配对后，我运气不佳。我尝试使用过滤器。

      map.addLayer({
          "id": "state-fills",
          "type": "fill",
          "source": {
            "type": "vector",
            "url": "mapbox://noeltech.c8nzzthb"
          },
          "source-layer":"R6_Pop_byMunicipal-5cqj12",
          "layout": {},
          "paint": {
                        "fill-color": "#627BC1",
                        "fill-opacity": 0
       }
   });
   map.addLayer({
    "id": "state-fills-hover",
    "type": "line",
    "source": {
      "type": "vector",
      "url": "mapbox://noeltech.c8nzzthb"
    },
    "source-layer":"R6_Pop_byMunicipal-5cqj12",
    "layout": {},
    "paint": {
      "line-color": "#627BC1",
      "line-width": 3
    },
    "filter": ["==", "NAME_2", ""]
  });
 //  map.setLayoutProperty('n_Region6 Municipals', 'visibility', 'none');

});
 map.on("mousemove", "state-fills", function(e) {
    map.setFilter("state-fills-hover", ["==", "NAME_2", 
   e.features[0].properties.NAME_2]);

它做了我想做的事，但它让我添加了另一层，我不想要那个。我想在我的 map 样式中使用图层。就像第一个代码一样。如何用简单的代码做到这一点？

Answer 1

你需要使用"type":"categorical"

语法是

map.setPaintProperty('n_Region6 Municipals', 'fill-color',{
  "property":"NAME_2",
  "type":"categorical",
  "stops":[
    [states[0].properties.NAME_2,"blue"],
    ],
  "default": "red"
});