kpst._this这里指向初始化的map
// 设置标注样式函数
function createStyle(name) {
// 河流style
var riverStyle = new Style({
stroke: new Stroke({
color: '#4e89d4',
width: 2
}),
fill: new Fill({
color: '#eee'
})
})
// 省份style·
var provinceStyle = new Style({
stroke: new Stroke({
color: '#4e89d4',
width: 1
}),
fill: new Fill({
color: '#eee'
})
})
//城市style·
if (name != '') {
var cityStyle = new ol.style.Style({
image: new ol.style.Circle({
radius: 5,
fill: new ol.style.Fill({
color: '#05ab57',
}),
stroke: new ol.style.Stroke({
color: '#05ab57',
width: 1
}),
}),
text: new ol.style.Text({
textAlign: "center", // 位置
textBaseline: "top", // 基准线
font: "normal 12px 微软雅黑", // 文字样式
text: name,
fill: new ol.style.Fill({
color: "#333",// 文本填充样式（即文字颜色)
}),
stroke: new ol.style.Stroke({
color: "#Fff",
}),
zIndex: 9
})
})
}
return {
riverStyle,
provinceStyle,
cityStyle
}
}
//创建图层
function creatlayer(name) {
var layer
if (name != 'city') {
layer = new VectorLayer({
name: name,
source: new VectorSource({
features: (new GeoJSON()).readFeatures(require("../../assets/data/" + name + '.json'))
}),
style: createStyle()[name + 'Style']
});
} else {
var features = (new GeoJSON()).readFeatures(require("../../assets/data/city.json"))
for (let i = 0; i < features.length; i++) {
const feature = features[i];
feature.setStyle(createStyle(feature.get("NAME")).cityStyle)
}
layer = new VectorLayer({
name: name,
source: new VectorSource({
features: features
})
})
}
kpst._this.addLayer(layer);
return layer
};
// 将图层加载到地图，并将所加图层赋给地图的某个对象
function layerFx(name) {
kpst._this[name] = creatlayer(name)
}
// 将图层加载函数挂载到地图
kpst._this.layerFx = layerFx
