无法在 angular 中获取 openlayers css

Question

我刚开始在我的 angular 6 中使用 openlayers 5，我遵循 this tutorial and also looking 。我的 angular 组件现在有

import ol-map from 'ol/map';
import ol-xyz from 'ol/source/xyz';
import ol-tile from 'ol/layer/tile';
import ol-view from 'ol/View';
import * as ol-proj from 'ol/proj';

在我的 class

 olmap: ol-map;
 source: ol-xyz;
 layer: ol-tile;
 view: ol-view;

然后在我的 ngOnInit

this.source = new ol-xyz({
  url: 'https://api.tiles.mapbox.com/v4/mapbox.light/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw'
});

this.layer = new ol-tile({
  source: this.source
});

this.view = new ol-view({
  center: ol-proj.fromLonLat([6.661594, 50.433237]),
  zoom: 3,
});

this.olmap = new ol-map({
  target: 'map',
  layers: [this.layer],
  view: this.view
});

这可行，但我不了解 openlayers 的样式。我将缩放按钮设置为简单的无样式按钮，位于地图 div 下方。我在这里错过了什么？如何插入 opelayers css 样式？

谢谢

Answer 1

您需要将 OpenLayers 样式表添加到 angular.json 文件的 styles 部分（此配置在 .angular-cli.json 之前 Angular 6).

OpenLayers 5/6 样式表
node_modules/ol/ol.css

OpenLayers 4 样式表
node_modules/openlayers/dist/ol.css

angular.json

{
  ...
  "projects": {
    "<project name>": {
      ...
      "architect": {
        "build": {
          ...
          "options": {
            ...
            "styles": [
              "node_modules/ol/ol.css",
              "src/styles.css"
            ],
            ...
          },
          ...
        },
        ...
        "test": {
          ...
          "options": {
            ...
            "styles": [
              "node_modules/ol/ol.css",
              "src/styles.css"
            ],
            ...
          }
        },
        ...
      }
    },
    ...
  },
  ...
}

无法在 angular 中获取 openlayers css

Cannot get the openlayers css in angular

css

angular

openlayers

angular6

openlayers-5