//在地图上显示当前选择的路径
- (void)presentCurrentRouteCourse{

    if (self.totalRouteNums <= 0) {
        return;
    }

    [self.naviRoute removeFromMapView];  //清空地图上已有的路线

    self.infoLabel.text = [NSString stringWithFormat:@"共%u条路线，当前显示第%u条",(unsigned)self.totalRouteNums,(unsigned)self.currentRouteIndex + 1];  //提示信息

    MANaviAnnotationType type = MANaviAnnotationTypeDrive; //驾车类型

    AMapGeoPoint *startPoint = [AMapGeoPoint locationWithLatitude:self.startAnnotation.coordinate.latitude longitude:self.startAnnotation.coordinate.longitude]; //起点

    AMapGeoPoint *endPoint = [AMapGeoPoint locationWithLatitude:self.destinationAnnotation.coordinate.latitude longitude:self.destinationAnnotation.coordinate.longitude];  //终点

    //根据已经规划的路径，起点，终点，规划类型，是否显示实时路况，生成显示方案
    self.naviRoute = [MANaviRoute naviRouteForPath:self.route.paths[self.currentRouteIndex] withNaviType:type showTraffic:self.showTrafficSwitch.on startPoint:startPoint endPoint:endPoint];

    [self.naviRoute addToMapView:self.mapView];  //显示到地图上

    UIEdgeInsets edgePaddingRect = UIEdgeInsetsMake(RoutePlanningPaddingEdge, RoutePlanningPaddingEdge, RoutePlanningPaddingEdge, RoutePlanningPaddingEdge); 

    //缩放地图使其适应polylines的展示
    [self.mapView setVisibleMapRect:[CommonUtility mapRectForOverlays:self.naviRoute.routePolylines]
                        edgePadding:edgePaddingRect
                           animated:YES];
}

//地图上的起始点，终点，拐点的标注，可以自定义图标展示等,只要有标注点需要显示，该回调就会被调用
- (MAAnnotationView *)mapView:(MAMapView *)mapView viewForAnnotation:(id<MAAnnotation>)annotation {
    if ([annotation isKindOfClass:[MAPointAnnotation class]]) {
        
        //标注的view的初始化和复用
        static NSString *routePlanningCellIdentifier = @"RoutePlanningCellIdentifier";
        
        MAAnnotationView *poiAnnotationView = (MAAnnotationView*)[self.mapView dequeueReusableAnnotationViewWithIdentifier:routePlanningCellIdentifier];
        
        if (poiAnnotationView == nil) {
            poiAnnotationView = [[MAAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:routePlanningCellIdentifier];
        }
        
        poiAnnotationView.canShowCallout = YES;
        poiAnnotationView.image = nil;
        
        //拐点的图标标注
        if ([annotation isKindOfClass:[MANaviAnnotation class]]) {
            switch (((MANaviAnnotation*)annotation).type) {
                case MANaviAnnotationTypeRailway:
                    poiAnnotationView.image = [UIImage imageNamed:@"railway_station"];
                    break;
                    
                case MANaviAnnotationTypeBus:
                    poiAnnotationView.image = [UIImage imageNamed:@"bus"];
                    break;
                    
                case MANaviAnnotationTypeDrive:
                    poiAnnotationView.image = [UIImage imageNamed:@"car"];
                    break;
                    
                case MANaviAnnotationTypeWalking:
                    poiAnnotationView.image = [UIImage imageNamed:@"man"];
                    break;
                    
                default:
                    break;
            }
        }else{
            //起点，终点的图标标注
            if ([[annotation title] isEqualToString:(NSString*)RoutePlanningViewControllerStartTitle]) {
                poiAnnotationView.image = [UIImage imageNamed:@"startPoint"];  //起点
            }else if([[annotation title] isEqualToString:(NSString*)RoutePlanningViewControllerDestinationTitle]){
                poiAnnotationView.image = [UIImage imageNamed:@"endPoint"];  //终点
            }
            
        }
        
        return poiAnnotationView;
    }
    
    return nil;
}