前端学习openLayers配合vue3（偏移动画效果，限制范围）

我们原来的偏移感觉比较生硬，我们来学习一下偏移的动画，先列一下这节的知识点

限制经纬度范围和缩放范围（view层）

view = new View({
    center:[114.305469,30.592876],
    zoom: 10,
    projection:'EPSG:4326',
    extent:[113.999999,30.25,114.666667,30.833333],//限制地图的范围（限制某个城市）
    //限制最大和最小的缩放级别
    minZoom:4,
    maxZoom:14
  })

经纬度的偏移动画（比如我们偏移到北京）

 // 设置北京的经纬度
  const beijing=[116.46,39.92]
  const view =map.getView()
  view.animate({
    center:beijing,
    zoom:10,
    projection:'EPSG:4356'
  })

完整代码

<script setup>
import { onMounted, reactive, ref } from "vue";
import { Map, View } from "ol";
import TileLayer from "ol/layer/Tile";
import { XYZ } from "ol/source";
import { fromLonLat } from "ol/proj";
defineProps({
  msg: String,
});
let map = reactive("");
let view = reactive("");
onMounted(() => {
  initMap();
});
let initMap = () => {
  (view = new View({
    center:[114.305469,30.592876],
    zoom: 10,
    projection:'EPSG:4326',
    extent:[113.999999,30.25,114.666667,30.833333],//限制地图的范围（限制某个城市）
    //限制最大和最小的缩放级别
    minZoom:4,
    maxZoom:14
  })),
    (map = new Map({
      target: "map", //挂载视图的容器
      layers: [
        new TileLayer({
          source: new XYZ({
            url: "http://wprd0{1-4}.is.autonavi.com/appmaptile?lang=zh_cn&size=1&style=7&x={x}&y={y}&z={z}",
            wrapX: false,
          }),
        }), //图层
      ],

      //视图
      view: view,
    }));
};
let move = () => {
  // 设置北京的经纬度
  const beijing=[116.46,39.92]
  const view =map.getView()
  view.animate({
    center:beijing,
    zoom:10,
    projection:'EPSG:4356'
  })
};
</script>

<template>
  <div id="map">
    <div class="btns">
      <button @click="move">中心点移动到北京市</button>
    </div>
  </div>
</template>

<style scoped>
.btns {
  display: flex;
  position: fixed;
  left: 20px;
  bottom: 20px;

  z-index: 999;
}
.btns div {
  width: 100px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.read-the-docs {
  color: #888;
}
#map {
  margin: 0;
  width: 100vw;
  height: 100vh;
}
</style>