我正在使用openlayers 3和ExtJS 6.我有一个载有GeoJson的向量。我清除它，并且我想在它被清除后添加一些新功能。 我的新数据由商店提供。所以这就是我想在我的向量中添加的内容：
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但是如果我执行：me.getData('myVector').getSource().addFeatures(myData)
我收到了错误。
我也试过
var format = new ol.format.GeoJSON();
me.getData('myVector').addFeatures(format.readFeatures( myData, {
featureProjection: 'EPSG:3857'
} ) );
它给了我0错误，但是当我想显示我的所有功能时，我的矢量中没有任何内容。
我该怎么办？