【解决办法】Leaflet加载地图时，需要设置分辨率和范围和iServer中的地图服务一致，例如：
map = L.map('map', {
center: [0, 0],
maxZoom: 18,
zoom: 2,
crs: new L.supermap.Proj.CRS("EPSG:4326",
{
origin: [-180.0, 90.0],
resolutions: [1.4062499999999996,0.7041106029214796,0.3520553014607398,0.1760276507303699,0.08801382536518496,0.04400691268259248,0.02200345634129624,0.011001728170648106,0.005500864085324065,0.002750432042662044],
bounds: L.bounds([-180.0, -90.0], [180.0, 90.0])
})
});
new L.supermap.TiledMapLayer("
https://iserver.supermap.io/iserver/services/map-world/rest/maps/World").addTo(map);
