Leaflet中使用Leaflet.Spin插件实现地图加载等待效果
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Leaflet中使用Leaflet.Spin插件实现地图加载等待效果
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場景
Leaflet快速入門與加載OSM顯示地圖：
Leaflet快速入門與加載OSM顯示地圖_BADAO_LIUMANG_QIZHI的博客-CSDN博客
在上面的基礎上，怎樣使用插件實現地圖加載等待效果如下
注：
博客：
BADAO_LIUMANG_QIZHI的博客_霸道流氓氣質_CSDN博客-C#,SpringBoot,架構之路領域博主
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實現
1、插件地址
GitHub - makinacorpus/Leaflet.Spin: Show a spinner on the map using Spin.js
2、下載源碼，引入插件所需要的spin.js和leaflet.spin.min.js
3、添加地圖區域GeoJson數據
??????? var campus = {type: "Feature",properties: {popupContent: "This is the Auraria West Campus",style: {weight: 2,color: "#999",opacity: 1,fillColor: "#B0DE5C",fillOpacity: .8}},geometry: {type: "MultiPolygon",coordinates: [[[[-105.00432014465332, 39.74732195489861],[-105.00715255737305, 39.7462000683517],[-105.00921249389647, 39.74468219277038],[-105.01067161560059, 39.74362625960105],[-105.01195907592773, 39.74290029616054],[-105.00989913940431, 39.74078835902781],[-105.00758171081543, 39.74059036160317],[-105.00346183776855, 39.74059036160317],[-105.00097274780272, 39.74059036160317],[-105.00062942504881, 39.74072235994946],[-105.00020027160645, 39.74191033368865],[-105.0007152557373, 39.74276830198601],[-105.00097274780272, 39.74369225589818],[-105.00097274780272, 39.74461619742136],[-105.00123023986816, 39.74534214278395],[-105.00183105468751, 39.74613407445653],[-105.00432014465332, 39.74732195489861]],[[-105.00361204147337, 39.74354376414072],[-105.00301122665405, 39.74278480127163],[-105.00221729278564, 39.74316428375108],[-105.00283956527711, 39.74390674342741],[-105.00361204147337, 39.74354376414072]]],[[[-105.00942707061768, 39.73989736613708],[-105.00942707061768, 39.73910536278566],[-105.00685214996338, 39.73923736397631],[-105.00384807586671, 39.73910536278566],[-105.00174522399902, 39.73903936209552],[-105.00041484832764, 39.73910536278566],[-105.00041484832764, 39.73979836621592],[-105.00535011291504, 39.73986436617916],[-105.00942707061768, 39.73989736613708]]]]}};4、模擬ajax請求后臺數據，這里是5秒，map.spin(true)則顯示加載效果，為false則不顯示加載效果
??????? var layer = L.geoJson().addTo(map);//設置為true則顯示加載效果map.spin(true);// Simulate AJAX//模擬ajax請求數據，5秒返回數據setTimeout(function () {layer.addData(campus);//設置為false則不顯示加載效果map.spin(false);}, 5000);5、完整示例代碼
? <!doctype html> <html lang="en"><head><meta charset="UTF-8"><title>leaflet實現地圖加載等待效果</title><link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css" /><style>html,body,#map {padding: 0;margin: 0;width: 100%;height: 100%;overflow: hidden;}</style> </head><body><div id="map"></div><script type="text/javascript" src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"></script><script type="text/javascript" src="./js/spin.js"></script><script type="text/javascript" src="./js/leaflet.spin.min.js"></script><script type="text/javascript">var map = L.map('map').setView([39.743855, -104.998158], 13);L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {attribution: ''}).addTo(map);var campus = {type: "Feature",properties: {popupContent: "This is the Auraria West Campus",style: {weight: 2,color: "#999",opacity: 1,fillColor: "#B0DE5C",fillOpacity: .8}},geometry: {type: "MultiPolygon",coordinates: [[[[-105.00432014465332, 39.74732195489861],[-105.00715255737305, 39.7462000683517],[-105.00921249389647, 39.74468219277038],[-105.01067161560059, 39.74362625960105],[-105.01195907592773, 39.74290029616054],[-105.00989913940431, 39.74078835902781],[-105.00758171081543, 39.74059036160317],[-105.00346183776855, 39.74059036160317],[-105.00097274780272, 39.74059036160317],[-105.00062942504881, 39.74072235994946],[-105.00020027160645, 39.74191033368865],[-105.0007152557373, 39.74276830198601],[-105.00097274780272, 39.74369225589818],[-105.00097274780272, 39.74461619742136],[-105.00123023986816, 39.74534214278395],[-105.00183105468751, 39.74613407445653],[-105.00432014465332, 39.74732195489861]],[[-105.00361204147337, 39.74354376414072],[-105.00301122665405, 39.74278480127163],[-105.00221729278564, 39.74316428375108],[-105.00283956527711, 39.74390674342741],[-105.00361204147337, 39.74354376414072]]],[[[-105.00942707061768, 39.73989736613708],[-105.00942707061768, 39.73910536278566],[-105.00685214996338, 39.73923736397631],[-105.00384807586671, 39.73910536278566],[-105.00174522399902, 39.73903936209552],[-105.00041484832764, 39.73910536278566],[-105.00041484832764, 39.73979836621592],[-105.00535011291504, 39.73986436617916],[-105.00942707061768, 39.73989736613708]]]]}};var layer = L.geoJson().addTo(map);//設置為true則顯示加載效果map.spin(true);// Simulate AJAX//模擬ajax請求數據，5秒返回數據setTimeout(function () {layer.addData(campus);//設置為false則不顯示加載效果map.spin(false);}, 5000);</script> </body></html>?總結
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