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我已经计算了 2 个点（纬度和经度）之间的距离。我使用了distanceFromLocation:但这给了我空中距离。我在显示道路路线的MKMapview 上绘制了MKPolyline 。现在的问题是，我怎样才能在不使用GOOGLE API的情况下获得实际的道路距离？

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3 回答 3

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如果您可以只使用 iOS 7，MKRoute请从MKDirectionsAPI 获取。路线有一个distance属性，即行进距离（即不是像乌鸦飞的那样）。

于 2013-10-03T10:30:24.267 回答
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我得到了答案，这给了我实际的距离。

- (NSArray*)getRoutePointFrom:(myannotation *)origin to:(myannotation *)destination 
{
    NSString* sourcePoint = [NSString stringWithFormat:@"%f,%f",origin.coordinate.latitude, origin.coordinate.longitude];
    NSString* destinationPoint = [NSString stringWithFormat:@"%f,%f", destination.coordinate.latitude, destination.coordinate.longitude];

    NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.google.com/maps?output=dragdir&saddr=%@&daddr=%@", sourcePoint, destinationPoint];
    NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];

    NSError *error;//saddr
    NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSUTF8StringEncoding error:&error];
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"points:\"([^\"]*)\"" options:0 error:NULL];
    NSTextCheckingResult *match = [regex firstMatchInString:apiResponse options:0 range:NSMakeRange(0, [apiResponse length])];
    NSString *encodedPoints = [apiResponse substringWithRange:[match rangeAtIndex:1]];

    NSRegularExpression *distRegEx=[NSRegularExpression regularExpressionWithPattern:@"tooltipHtml:\"([^\"]*)\""options:0 error:NULL];
    NSTextCheckingResult *distmatch=[tempregx firstMatchInString:apiResponse options:0 range:NSMakeRange(0, [apiResponse length])];

    NSString *dist= [apiResponse substringWithRange:[temppmatch rangeAtIndex:0]];
    NSLog(@"dist in Km: %@",dist);
    return [self decodePolyLine:[encodedPoints mutableCopy]];
  }
于 2013-10-03T12:43:30.680 回答
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你can't find the distance based on roads with the Apple SDK。如果你真的想要，那么你必须直接通过谷歌API。：

http://code.google.com/intl/fr-FR/apis/maps/index.html

于 2013-10-03T10:14:04.310 回答