fix bug

src/app/shared/components/amap/amap.service.ts

@@ -1,9 +1,31 @@
 import { Injectable } from '@angular/core';
-
+import { Observable, Subject } from 'rxjs';
+declare var AMap: any;
 @Injectable({
   providedIn: 'root'
 })
 export class AmapService {
+  constructor() {}
+  public length = 0;
+  public time = 0;
 
-  constructor() { }
+  sub = new Subject<any>();
+
+  //计算路径驾车最优路线的长度与所需时间
+  drivingCompute(starts: any[], ends: any[]): Observable<any> {
+    AMap.plugin('AMap.Driving', () => {
+      let driving = new AMap.Driving({
+        // 驾车路线规划策略，AMap.DrivingPolicy.LEAST_TIME是最快捷模式
+        policy: AMap.DrivingPolicy.LEAST_TIME
+      });
+      const points = starts.concat(ends).map(item => {
+        return { keyword: item.address, city: item.city };
+      });
+      driving.search(points, (status: any, result: any) => {
+        const repData = { distance: (result.routes[0].distance / 1000).toFixed(2), time: (result.routes[0].time / 60 / 60).toFixed(2) };
+        this.sub.next(repData);
+      });
+    });
+    return this.sub;
+  }
 }