【OpenLayer3】Feature设置不同颜色技巧

var highlightLayer  = new ol.layer.Vector({
source: new ol.source.Vector()
});
var highllightSource = highlightLayer.getSource();

var colorSet = ['#1fca04','#cf5a34','#adda5f'];

var newFeature = new ol.Feature({
geometry:new ol.geom.MultiPoint(selectedCoords),
style:   new ol.style.Style({
image: new ol.style.Circle({
radius: 7,
fill: new ol.style.Fill({
color: colorSet[0]
opacity: 0.5
})
})
})
}));

// 通过 ol.color.asArray 将原来16进制的颜色值，改为 r,g,b,a的数组
var highAlpColor = ol.color.asArray('#1fca04');
highAlpColor = highAlpColor.slice();
highAlpColor[3] = 0.9;

var newFeature = new ol.Feature({
geometry:new ol.geom.MultiPoint(selectedCoords)
});

// 分开来设置 style
newFeature.setStyle(new ol.style.Style({
image: new ol.style.Circle({
radius: 7,
fill: new ol.style.Fill({
color: highAlpColor
})
})
}));