The core component of Navmii SDK responsible for route calculation is NMRoutingService. This class provides the API for calculating new routes and snapping external routes to the map.
CREATING ROUTING SERVICE
NMSdk class contains routingService
property which allows Navmii SDK contains builder class NMRoutingServiceBuilder to be used to create a user to access routing service instance. The routing service instance can only be created after the SDK was started.
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/// RoutingServiceContainer.h #import <Foundation/Foundation.h> #import <NavmiiSDK/NMSdk.h> #import <NavmiiSDK/NMRoutingService.h> @interface RoutingServiceContainer : NSObject @property (nonatomic, readonly, strong, nullable) NMRoutingService *routingService; - @end /// RoutingServiceContainer.m #import "RoutingServiceContainer.h" #import <NavmiiSDK/NMRoutingServiceBuilder.h> @implementation RoutingServiceContainer (nullable instancetype)initWithSdk:(nonnull NMSdk *)sdk; - (nullable instancetype)init NS_UNAVAILABLE; + (nullable instancetype)new NS_UNAVAILABLE; @end /// RoutingServiceContainer.m #import "RoutingServiceContainer.h" @implementation RoutingServiceContainer { NMSdk *sdk; } @synthesize routingService; - (nullable NMRoutingService *)routingService { if (routingService == nil) { routingService = [[NMRoutingServiceBuilder new] build]sdk.routingService; } return routingService; } - @end |
ROUTING SERVICE BASICS
Routing service can be used to calculate new routes or to snap external routes to the map. Routing service handles both processes in the same way.
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(nullable instancetype)initWithSdk:(nonnull NMSdk *)sdk {
if (self = [super init]) {
self->sdk = sdk;
}
return self;
}
@end
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ROUTING SERVICE BASICS
Routing service can be used to calculate new routes or to snap external routes to the map. Routing service handles both processes in the same way.
Successful route calculation or snapping result is the route or the list of routes each of which is represented by NMRoute class instance. Those routes can be used by other SDK modules: they can be rendered on map or used for navigation.
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/// SimpleRouteCalculator.h #import <Foundation/Foundation.h> #import <NavmiiSDK/NMSdk.h> #import <NavmiiSDK/NMRoutePlanPoint.h> #import <NavmiiSDK/NMRouteCalculationOptions.h> @interface SimpleRouteCalculator : NSObject - (void)calculateRouteUsingRoutePlanPoints:(nonnull NSArray<NMRoutePlanPoint *> *)routePlanPoints options:(nullable NMRouteCalculationOptions *)options; - (void)cancelRouteCalculation; - (nullable instancetype)initWithSdk:(nonnull NMSdk *)sdk; - (nullable instancetype)init NS_UNAVAILABLE; + (nullable instancetype)new NS_UNAVAILABLE; @end /// SimpleRouteCalculator.m #import "SimpleRouteCalculator.h" #import "RoutingServiceContainer.h" #import <NavmiiSDK/NMRouteCalculationSession.h> #import <NavmiiSDK/NMRouteCalculationListener.h> @interface SessionListener: NSObject<NMRouteCalculationListener> - (nullable instancetype)init NS_UNAVAILABLE; - (nullable instancetype)initWithWeakCalculator:(__weak SimpleRouteCalculator *)weakCalculator; @end @implementation SimpleRouteCalculator { RoutingServiceContainer *routingServiceContainer; NMRouteCalculationSession *session; SessionListener *sessionListener; } - (void)calculateRouteUsingRoutePlanPoints:(nonnull NSArray<NMRoutePlanPoint *> *)routePlanPoints options:(nullable NMRouteCalculationOptions *)options { NMRoutingService *routingService = routingServiceContainer.routingService; if (routingService == nil) { // Routing service is not available. return; } [self cancelRouteCalculation]; SessionListener *sessionListener = [[SessionListener alloc] initWithWeakCalculator:self]; NMRouteCalculationSession *session = [routingService calculateRouteUsingRoutePlan:routePlanPoints options:options statusReportListener:sessionListener]; if (session == nil) { // Couldn't start route calculation. return; } // Store route calculation session and its listeners. self->session = session; self->sessionListener = sessionListener; } - (void)cancelRouteCalculation { // Optional: you may not do this if you don't pass session elsewhere. if (session != nil) { [session cancel]; } [self onSessionFinished]; } - (void)onSessionFinished { session = nil; sessionListener = nil; } - (nullable instancetype)init)initWithSdk:(nonnull NMSdk *)sdk { if (self = [super init]) { routingServiceContainer = [[RoutingServiceContainer new alloc] initWithSdk:sdk]; } return self; } @end @implementation SessionListener { __weak SimpleRouteCalculator *weakCalculator; } - (void)onRouteCalculationSucceededWithResult:(nonnull NMRouteCalculationResult *)result { // Route calculation succeeded: handling result. // Releasing session and listeners. SimpleRouteCalculator *calculator = weakCalculator; if (calculator != nil) { [calculator onSessionFinished]; } } - (void)onRouteCalculationFailedWithInfo:(nonnull NMRouteCalculationFailureInfo *)failureInfo { // Route calculation failed: handling failure info. // Releasing session and listeners. SimpleRouteCalculator *calculator = weakCalculator; if (calculator != nil) { [calculator onSessionFinished]; } } - (void)onNonFatalRouteCalculationErrorOccurred:(NMRouteCalculationError)error { // Non-fatal route calculation error occurred: handling it. Route calculation continues. } - (nullable instancetype)initWithWeakCalculator:(__weak SimpleRouteCalculator *)weakCalculator { if (self = [super init]) { self->weakCalculator = weakCalculator; } return self; } @end |
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// ExtendedRouteCalculator.h #import <Foundation/Foundation.h> #import "SimpleRouteCalculator.h" #import <NavmiiSDK/NMMapCoordinates.h> #import <NavmiiSDK/NMPosition.h> @interface ExtendedRouteCalculator : SimpleRouteCalculator - (void)calculateRouteUsingRoutePlanCoords:(nonnull NSArray<NMMapCoordinates *> *)routePlanCoords options:(nullable NMRouteCalculationOptions *)options; - (void)calculateRouteFromCurrentPosition:(nonnull NMPosition *)currentPosition usingRoutePlanCoords:(nonnull NSArray<NMMapCoordinates *> *)routePlanCoords options:(nullable NMRouteCalculationOptions *)options; @end // ExtendedRouteCalculator.m #import "ExtendedRouteCalculator.h" @implementation ExtendedRouteCalculator - (void)calculateRouteUsingRoutePlanCoords:(nonnull NSArray<NMMapCoordinates *> *)routePlanCoords options:(nullable NMRouteCalculationOptions *)options { NSArray<NMRoutePlanPoint *> *routePlanPoints = [ExtendedRouteCalculator pointsFromCoords:routePlanCoords]; [self calculateRouteUsingRoutePlanPoints:routePlanPoints options:options]; } - (void)calculateRouteFromCurrentPosition:(nonnull NMPosition *)currentPosition usingRoutePlanCoords:(nonnull NSArray<NMMapCoordinates *> *)routePlanCoords options:(nullable NMRouteCalculationOptions *)options { NSArray<NMRoutePlanPoint *> *routePlanPoints = [[NSArray arrayWithObject:[[NMRoutePlanPoint alloc] initWithPosition:currentPosition]]; routePlanPoints = [routePlanPoints arrayByAddingObjectsFromArray:[ExtendedRouteCalculator pointsFromCoords:routePlanCoords]]; [self calculateRouteUsingRoutePlanPoints:routePlanPoints options:options]; } + (nonnull NSArray<NMRoutePlanPoint *> *)pointsFromCoords:(nonnull NSArray<NMMapCoordinates *> *)routePlanCoords { NSMutableArray<NMRoutePlanPoint *> *routePlanPoints = [[NSMutableArray<NMRoutePlanPoint *> alloc] initWithCapacity:routePlanCoords.count]; for (NMMapCoordinates *coords in routePlanCoords) { [routePlanPoints addObject:[[NMRoutePlanPoint alloc] initWithCoords:coords]]; } return routePlanPoints; } @end |
ROUTING SERVICE SETTINGS
As you can see in the examples above user is able to pass route calculation options within each routing service request. The specified options are used during request handling. If no options were passed default options are used. NMRouteCalculationOptions class instances represent available route calculation options.
APPLYING TRAFFIC
There are two ways to apply traffic to the routes calculated by the routing service:
- route calculation options has the
traffic
property which allows user to pass a traffic snapshot to be used during the specified request handling. - routing service has the
trafficService
property which allows user to bind the routing service to the traffic service. Traffic service is another Navmii SDK module which is responsible for providing the latest available traffic information.
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:routePlanPoints options:options];
}
+ (nonnull NSArray<NMRoutePlanPoint *> *)pointsFromCoords:(nonnull NSArray<NMMapCoordinates *> *)routePlanCoords {
NSMutableArray<NMRoutePlanPoint *> *routePlanPoints =
[[NSMutableArray<NMRoutePlanPoint *> alloc] initWithCapacity:routePlanCoords.count];
for (NMMapCoordinates *coords in routePlanCoords) {
[routePlanPoints addObject:[[NMRoutePlanPoint alloc] initWithCoordinates:coords]];
}
return routePlanPoints;
}
@end
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ROUTING SERVICE SETTINGS
As you can see in the examples above user is able to pass route calculation options within each routing service request. The specified options are used during request handling. If no options were passed default options are used. NMRouteCalculationOptions class instances represent available route calculation options.