mapbox中对同一图层（layer）的不同要素（feature）设置不同的颜色

方法是，给geojson中的每一个feature的propreties设置一个color属性，用于承载不同的颜色，然后在layer加载时候，给paint使用["get","color"],具体代码如下：

var myLocation={"type": "FeatureCollection","features": [{"type": "Feature","properties": {"id":1,"name": "kunming","color":"red"},"geometry": {"coordinates": [102.73,25.04],"type": "Point"}},{"type": "Feature","properties": {"id":10,"name": "kunming","color":"green"},"geometry": {"coordinates": [102.83,25.04],    //获取color字段，设置点的颜色"type": "Point"}}]
};map.addSource('mySource', { type: 'geojson', data: myLocation });
map.addLayer({"id": "myLayer","type": "circle","source": "mySource","paint": {"circle-color": ["get",'color']     }
});