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一些信息：我有一个主层（地图），我在点之间画线，这些点是从带有 Linestring 的 JSON 结果中接收的。

（问题）我在网上遵循了一个关于如何自定义我要添加的点的示例。但这不起作用。（看底部的功能。）

代码：

//'listOfPoints' is an array containing all the point objects.

var pointmap = new OpenLayers.Geometry.LineString(listOfPoints);

    var lastpoint = listOfPoints[listOfPoints.length -1];


    var vesselLayer = new OpenLayers.Layer.Vector(data.bridge_name);

    if (lastpoint != null) {
        var markerLayer = getPOI(lastpoint);
        vesselLayer.addFeatures([pointmap,markerLayer]);
    } else {
        vesselLayer.addFeatures([new OpenLayers.Feature.Vector(pointmap)]);
    }

// Function for creating a marker and returning it to the caller. 

function getPOI(point) {

//This was also tried without the "Style" property. (Only the externalGraphic line)
var temp_feature = new OpenLayers.Feature.Vector(
        point,
        style: { externalGraphic: '/assets/img/marker.png', graphicHeight: 16,     graphicWidth: 16, graphicXOffset:8, graphicYOffset:8  }
    );    

return temp_feature;
}
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1 回答 1

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乍一看，temp_feature 定义有错误：

var temp_feature = new OpenLayers.Feature.Vector(
    point,
    null,
    {
        externalGraphic: '/assets/img/marker.png',
        graphicHeight: 16,
        graphicWidth: 16,
        graphicXOffset:8,
        graphicYOffset:8
    }
);

阅读和遵循 API 文档很有用： http ://dev.openlayers.org/docs/files/OpenLayers/Feature/Vector-js.html#OpenLayers.Feature.Vector.OpenLayers.Feature.Vector

OpenLayers.Feature.Vector 采用三个参数，几何，具有属性的对象（在您的情况下为空，因为您没有任何属性）和具有样式的对象。

我还没有测试过那个代码，可能还有其他问题。

关于 JavaScript 的一般用途，从来没有这样的事情

style: { externalGraphic: '/assets/img/marker.png', graphicHeight: 16,     graphicWidth: 16, graphicXOffset:8, graphicYOffset:8  }

对象总是在括号内定义：

{style: { externalGraphic: '/assets/img/marker.png', graphicHeight: 16,     graphicWidth: 16, graphicXOffset:8, graphicYOffset:8  }}
于 2012-12-11T09:33:53.867 回答