计算指定范围、层级内的瓦片个数
指定计算时使用的投影
指定经纬度范围
最小层级
最大层级
指定范围，层级内包含的瓦片个数
下载瓦片
// 下载wmts服务
RTNTileDownloader.downloadTile({
urlTemplate: 'http://example.com/tiles/{x}/{y}/{z}/',
folder: '/data/user/0/com.example/cache/tiles',
bounds: {
bottom: 30.514121291346576,
left: 104.08676403274296,
right: 104.09625099281573,
top: 30.53037575054801,
},
maxZoom: 4,
minZoom: 2,
projection: 'mercator',
scheme: 'wmts',
})
// 下载 iserver xyz
RTNTileDownloader.downloadTile({
urlTemplate: 'https://iserver.supermap.io/iserver/services/map-world/rest/maps/World',
folder: '/data/user/0/com.example/cache/tiles',
bounds: {
bottom: 30.514121291346576,
left: 104.08676403274296,
right: 104.09625099281573,
top: 30.53037575054801,
},
maxZoom: 4,
minZoom: 2,
projection: 'mercator',
scheme: 'iserver_xyz',
})
// 下载 iserver tileimage
RTNTileDownloader.downloadTile({
urlTemplate: 'https://iserver.supermap.io/iserver/services/map-world/rest/maps/World',
folder: '/data/user/0/com.example/cache/tiles',
bounds: {
bottom: 30.514121291346576,
left: 104.08676403274296,
right: 104.09625099281573,
top: 30.53037575054801,
},
maxZoom: 4,
minZoom: 2,
projection: 'lnglat',
scheme: 'iserver_tileimage',
})
进度可通过以下事件监听
// 监听下载进度
const e = RTNMobileXEvent.addListener('onTileDownloadProgress', (p) => {
console.log('onTileDownloadProgress', p.current / p.total)
})
// 监听下载完成事件
const e1 = RTNMobileXEvent.addListener('onTileDownloaded', (p) => {
console.log('on downloaded', p)
})
// 监听下载取消事件
const e2 = RTNMobileXEvent.addListener('onTileCancelled', (p) => {
console.log('on download cancel', p)
})
下载参数
下载任务 id，可传给 cancelDownload 取消任务
React Native 原生瓦片下载模块。
通过导出的 RTNTileDownloader 使用。下载进度、完成和取消状态通过 RTNMobileXEvent 的
addListener()监听。