Cesium加载Geowebcache切片

1、会有跨域问题，谷歌浏览器跨域解决方案

2、加载代码：

    let parameters = {
        service: 'WMS',
        format: 'image/png',
        tiled: true, //是否是切片
        version: '1.1.0',
        SRS: 'EPSG:3857',
        exceptions: 'application/vnd.ogc.se_inimage',
        transparent: 'true',
        request: 'GetMap'
    };
    var provider_mmmm = new Cesium.WebMapServiceImageryProvider({
        crossOrigin: 'anonymous', //跨域
        url: 'http://10.19.151.238:8080/geoserver/yq/wms',
        wrapX: false, //是否可以重复平铺
        //layers: 'JCSJ_SHLJZ_BLACK',
        layers: 'yq:ShangHai_SLJP',
        parameters,
        tilingScheme: new Cesium.WebMercatorTilingScheme({
            numberOfLevelZeroTilesX: 1,
            numberOfLevelZeroTilesY: 1
        }),
        proxy: new Cesium.DefaultProxy('/proxy/')
    });
view.imageryLayers.addImageryProvider(provider_mmmm);