openlayer加载本地图片(入门级示例)

 var extent = [0, 0, 400, 400];
        var projection = new ol.proj.Projection({
            code: 'xkcd-image',
            units: 'pixels',
            extent: extent
        });
        var map = new ol.Map({
            target: 'map',
            layers: [
                new ol.layer.Image({
                    source: new ol.source.ImageStatic({
                        url: 'data/1.jpg',//这里添加静态图片的地址
                        crossOrigin:"anonymous",
                        projection: projection,
                        imageExtent: extent
                    })
                })],
            view: new ol.View({
                center: ol.extent.getCenter(extent),
                zoom: 2,
                maxZoom: 8,
                projection: projection
            })