feat(App): location

packages/uni-app-plus/src/helpers/location.ts

+const PI: number = 3.1415926535897932384626
+const a: number = 6378245.0
+const ee: number = 0.00669342162296594323
+
+export function gcj02towgs84(lng: number, lat: number) {
+  lat = +lat
+  lng = +lng
+  if (outOfChina(lng, lat)) {
+    return [lng, lat]
+  }
+  let dlat = _transformlat(lng - 105.0, lat - 35.0)
+  let dlng = _transformlng(lng - 105.0, lat - 35.0)
+  const radlat = (lat / 180.0) * PI
+  let magic = Math.sin(radlat)
+  magic = 1 - ee * magic * magic
+  const sqrtmagic = Math.sqrt(magic)
+  dlat = (dlat * 180.0) / (((a * (1 - ee)) / (magic * sqrtmagic)) * PI)
+  dlng = (dlng * 180.0) / ((a / sqrtmagic) * Math.cos(radlat) * PI)
+  const mglat = lat + dlat
+  const mglng = lng + dlng
+  return [lng * 2 - mglng, lat * 2 - mglat]
+}
+
+export function wgs84togcj02(lng: number, lat: number) {
+  lat = +lat
+  lng = +lng
+  if (outOfChina(lng, lat)) {
+    return [lng, lat]
+  }
+  let dlat = _transformlat(lng - 105.0, lat - 35.0)
+  let dlng = _transformlng(lng - 105.0, lat - 35.0)
+  const radlat = (lat / 180.0) * PI
+  let magic = Math.sin(radlat)
+  magic = 1 - ee * magic * magic
+  const sqrtmagic = Math.sqrt(magic)
+  dlat = (dlat * 180.0) / (((a * (1 - ee)) / (magic * sqrtmagic)) * PI)
+  dlng = (dlng * 180.0) / ((a / sqrtmagic) * Math.cos(radlat) * PI)
+  const mglat = lat + dlat
+  const mglng = lng + dlng
+  return [mglng, mglat]
+}
+
+const outOfChina = function (lng: number, lat: number) {
+  return (
+    lng < 72.004 || lng > 137.8347 || lat < 0.8293 || lat > 55.8271 || false
+  )
+}
+const _transformlat = function (lng: number, lat: number) {
+  let ret =
+    -100.0 +
+    2.0 * lng +
+    3.0 * lat +
+    0.2 * lat * lat +
+    0.1 * lng * lat +
+    0.2 * Math.sqrt(Math.abs(lng))
+  ret +=
+    ((20.0 * Math.sin(6.0 * lng * PI) + 20.0 * Math.sin(2.0 * lng * PI)) *
+      2.0) /
+    3.0
+  ret +=
+    ((20.0 * Math.sin(lat * PI) + 40.0 * Math.sin((lat / 3.0) * PI)) * 2.0) /
+    3.0
+  ret +=
+    ((160.0 * Math.sin((lat / 12.0) * PI) + 320 * Math.sin((lat * PI) / 30.0)) *
+      2.0) /
+    3.0
+  return ret
+}
+const _transformlng = function (lng: number, lat: number) {
+  let ret =
+    300.0 +
+    lng +
+    2.0 * lat +
+    0.1 * lng * lng +
+    0.1 * lng * lat +
+    0.1 * Math.sqrt(Math.abs(lng))
+  ret +=
+    ((20.0 * Math.sin(6.0 * lng * PI) + 20.0 * Math.sin(2.0 * lng * PI)) *
+      2.0) /
+    3.0
+  ret +=
+    ((20.0 * Math.sin(lng * PI) + 40.0 * Math.sin((lng / 3.0) * PI)) * 2.0) /
+    3.0
+  ret +=
+    ((150.0 * Math.sin((lng / 12.0) * PI) +
+      300.0 * Math.sin((lng / 30.0) * PI)) *
+      2.0) /
+    3.0
+  return ret
+}

packages/uni-app-plus/src/service/api/index.ts

@@ -13,3 +13,5 @@ export * from './keyboard/keyboard'
 export * from './network/downloadFile'
 
 export * from './context/createInnerAudioContext'
+
+export * from './location/getLocation'

packages/uni-app-plus/src/service/api/location/getLocation.ts

+import {
+  defineAsyncApi,
+  API_GET_LOCATION,
+  API_TYPE_GET_LOCATION,
+  GetLocationProtocol,
+  GetLocationOptions,
+} from '@dcloudio/uni-api'
+
+import { gcj02towgs84, wgs84togcj02 } from '../../../helpers/location'
+
+function getLocationSuccess(
+  type: string,
+  position: any,
+  resolve: (res: any) => void
+) {
+  const coords = position.coords
+  if (type !== position.coordsType) {
+    if (process.env.NODE_ENV !== 'production') {
+      console.log(
+        `UNIAPP[location]:before[${position.coordsType}][lng:${coords.longitude},lat:${coords.latitude}]`
+      )
+    }
+    let coordArray
+    if (type === 'wgs84') {
+      coordArray = gcj02towgs84(coords.longitude, coords.latitude)
+    } else if (type === 'gcj02') {
+      coordArray = wgs84togcj02(coords.longitude, coords.latitude)
+    }
+    if (coordArray) {
+      coords.longitude = coordArray[0]
+      coords.latitude = coordArray[1]
+      if (process.env.NODE_ENV !== 'production') {
+        console.log(
+          `UNIAPP[location]:after[${type}][lng:${coords.longitude},lat:${coords.latitude}]`
+        )
+      }
+    }
+  }
+
+  resolve({
+    type,
+    altitude: coords.altitude || 0,
+    latitude: coords.latitude,
+    longitude: coords.longitude,
+    speed: coords.speed,
+    accuracy: coords.accuracy,
+    address: position.address,
+    errMsg: 'getLocation:ok',
+  })
+}
+
+export const getLocation = <API_TYPE_GET_LOCATION>defineAsyncApi(
+  API_GET_LOCATION,
+  (
+    { type = 'wgs84', geocode = false, altitude = false },
+    { resolve, reject }
+  ) => {
+    plus.geolocation.getCurrentPosition(
+      (position) => {
+        getLocationSuccess(type, position, resolve)
+      },
+      (e) => {
+        // 坐标地址解析失败
+        if (e.code === 1501) {
+          getLocationSuccess(type, e, resolve)
+          return
+        }
+
+        reject('getLocation:fail ' + e.message)
+      },
+      {
+        geocode: geocode,
+        enableHighAccuracy: altitude,
+      }
+    )
+  },
+  GetLocationProtocol,
+  GetLocationOptions
+)