iOS中两个位置之间的估计时间[关闭]

Question

从 AnyLocation 到 MyCurrentLocation 获取 ETA（预计到达时间）的正确方法是什么？

我想，当点击任何注释时，我必须根据该注释和用户的当前位置在页脚上设置详细信息。

请看下图更好地理解。

我看到了这个What is proper way to get ETA (estimated time arrival) from any location to my current location 和这个calculate time taken to cover a journey in Apple Maps 但是他们并没有用这个解决我的问题。使用这个我总是得到空响应。我把我的代码放在下面：-

double latitude = -0.075410;
double longitude = 51.512520;
MKPlacemark *placemark = [[MKPlacemark alloc] initWithCoordinate:CLLocationCoordinate2DMake(latitude, longitude) addressDictionary:nil] ;
MKMapItem *mapItemSource = [[MKMapItem alloc] initWithPlacemark:placemark];

double latitude1 = -0.132128;
double longitude1 = 51.464138;
MKPlacemark *placemark1 = [[MKPlacemark alloc] initWithCoordinate:CLLocationCoordinate2DMake(latitude1, longitude1) addressDictionary:nil] ;
MKMapItem *mapItemDestination = [[MKMapItem alloc] initWithPlacemark:placemark1];

MKDirectionsRequest *directionsRequest = [[MKDirectionsRequest alloc] init];
[directionsRequest setSource:mapItemSource];
[directionsRequest setDestination:mapItemDestination];
directionsRequest.transportType = MKDirectionsTransportTypeAutomobile;
MKDirections *directions = [[MKDirections alloc] initWithRequest:directionsRequest];

[directions calculateETAWithCompletionHandler:^(MKETAResponse *response, NSError *error) {
    if (error) {
        NSLog(@"Error %@", error.description);
    } else {
        NSLog(@"expectedTravelTime %f", response.expectedTravelTime);
    }
}];
//I am not sure why I am getting Null response into calculateETAWithCompletionHandler this method..

//Also tried following......
[directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
    if (error) {
        NSLog(@"Error %@", error.description);
    } else {
        MKRoute * routeDetails = response.routes.lastObject;
        //[self.mapView addOverlay:routeDetails.polyline];
        NSLog(@"Street %@",[placemark.addressDictionary objectForKey:@"Street"]);
        NSLog(@"distance %@",[NSString stringWithFormat:@"%0.1f Miles", routeDetails.distance/1609.344]);
        NSLog(@"expectedTravelTime %@",[NSString stringWithFormat:@"%0.1f minutes",routeDetails.expectedTravelTime/60]);
    }
}];
//I am not sure why I am getting Null response into calculateDirectionsWithCompletionHandler this method..

我还看到了这个Is there any way to determine the driving time between two locations using Apple's Maps API? 和这个How to calculate time required to complete the path in between two locations?。但是现在，我不想使用Google Maps Directions API。因为我的客户不想使用它。如果 Google API 是免费的，那我当然更喜欢它。

另外，我尝试了distanceFromLocation 方法。但是，我认为，这个解决方案假设两点之间的距离是直线，这几乎没有用处。

有没有其他解决方案可以做到这一点..？？

任何帮助将不胜感激。

Answer 1

试试这个方法。在这里你必须传递源和目的地的经纬度信息。

NSString *strUrl = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%f,%f&destination=%f,%f&sensor=false&mode=%@", lat,  longi, userLat,  userLong, @"DRIVING"];
NSURL *url = [NSURL URLWithString:[strUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSData *jsonData = [NSData dataWithContentsOfURL:url];
if(jsonData != nil)
{
    NSError *error = nil;
    id result = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
    NSMutableArray *arrDistance=[result objectForKey:@"routes"];
    if ([arrDistance count]==0) {
        NSLog(@"N.A.");
    }
    else{
        NSMutableArray *arrLeg=[[arrDistance objectAtIndex:0]objectForKey:@"legs"];
        NSMutableDictionary *dictleg=[arrLeg objectAtIndex:0];
        NSLog(@"%@",[NSString stringWithFormat:@"Estimated Time %@",[[dictleg   objectForKey:@"duration"] objectForKey:@"text"]]);
    }
}
else{
    NSLog(@"N.A.");
}

Answer 2

如果您想计算点之间的行程时间，您首先需要指定您需要驾车或步行路线，然后生成路线。路线请求的结果将包括行程时间估算。

您需要使用 MapKit、MKDirectionsRequest 和 MKDirections 等类。您还需要配置您的应用程序以请求 Apple 允许生成行车路线。我在网上找到了this 链接，该链接解释了如何计算行车路线。

Answer 3

您可以为此使用 google api，并且默认情况下还有一件事是方法

locA = [[CLLocation alloc] initWithLatitude:[[latsArray objectAtIndex:0] floatValue] longitude:[[longArray objectAtIndex:0]  floatValue]];
locB = [[CLLocation alloc] initWithLatitude:[[latsArray objectAtIndex:1] floatValue] longitude:[[longArray objectAtIndex:1]  floatValue]];

distance = [locA distanceFromLocation:locB] * 0.000621371;

步行时间

 float time  = distance / 3.1; //divide by 3.1 for by walk