Question

我需要在两个位置之间显示多个路径，这两个位置是用户输入位置，并且还显示它们之间的最短路径。最短的路线是多条路线之一。

请帮助。

由于

Answer 1

MKDirections calculateDirectionsWithCompletionHandler方法，返回一个MKDirectionsResponse对象，该对象包含可能的MKRoutes数组作为属性。

以下代码获取两个位置之间的所有路径，然后使用NSSortDescriptor对数组进行排序，以获得按其最短距离排序的路径数组。

希望它有所帮助！

//Create MKDirectionsRequest
MKDirectionsRequest * request = [[MKDirectionsRequest alloc] init];
request.source = [[MKMapItem alloc] initWithPlacemark:[[MKPlacemark alloc] initWithCoordinate:sourceCoordinate addressDictionary:nil]];
request.destination = [[MKMapItem alloc] initWithPlacemark:[[MKPlacemark alloc] initWithCoordinate:destinationCoordinate addressDictionary:nil]];
request.transportType = MKDirectionsTransportTypeAutomobile; //Or any other transport type.
//Get directions between two points
MKDirections * directions = [[MKDirections alloc] initWithRequest:request];
[directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
    NSSortDescriptor *sortDescriptor;
    sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"distance"
                                             ascending:YES];
    //Get the routes array sorted by distance
    NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
    NSArray *sortedRoutes;
    sortedRoutes = [response.routes sortedArrayUsingDescriptors:sortDescriptors];

    //The fastest route is the one at index 0 of the sorted array
    MKRoute * fastestRoute = [sortedRoutes objectAtIndex:0];
 }];

如何使用mkmapview找到两个位置之间的多条路线

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