Question

我正在尝试将Apple Maps集成到我的iPhone应用程序中以显示两个位置之间的路线。但它不会显示任何路线＆amp;将简单地在控制台中打印大量消息。

我位于印度孟买。当我尝试在iPhone上使用官方地图应用程序搜索路线时，它向我发出警告，“找不到路线”！

在模拟器中我在美国使用两个预定位置时，它会正确绘制路线以及其他路线。所以我得出结论，Apple Map服务在美国以外（特别是在印度）非常有限。

我想尽可能多地使用本机服务，但现在看起来很难。有没有人知道这个问题＆amp;这就是情况那么其他选择是什么？

以下是两种情况的代码示例：

印度（没有结果）：

let request: MKDirectionsRequest = MKDirectionsRequest()
request.source = MKMapItem(placemark: MKPlacemark(coordinate: CLLocationCoordinate2D(latitude: 19.02, longitude: 72.85), addressDictionary: nil))
request.destination = MKMapItem(placemark: MKPlacemark(coordinate: CLLocationCoordinate2D(latitude: 19.12, longitude: 73.85), addressDictionary: nil))
request.transportType = MKDirectionsTransportType.automobile;
request.requestsAlternateRoutes = true

let directions = MKDirections(request: request)

directions.calculate { [unowned self] response, error in
    guard let unwrappedResponse = response else { return }
    for route in unwrappedResponse.routes {
        self.mapView.add(route.polyline)
        self.mapView.setVisibleMapRect(route.polyline.boundingMapRect, animated: true)
    }
}

U.S。（给出正确的路线）

let request: MKDirectionsRequest = MKDirectionsRequest()
request.source = MKMapItem(placemark: MKPlacemark(coordinate: CLLocationCoordinate2D(latitude: 40.71, longitude: -74.00), addressDictionary: nil))
request.destination = MKMapItem(placemark: MKPlacemark(coordinate: CLLocationCoordinate2D(latitude: 37.78, longitude: -122.41), addressDictionary: nil))
request.transportType = MKDirectionsTransportType.automobile;
request.requestsAlternateRoutes = true

let directions = MKDirections(request: request)

directions.calculate { [unowned self] response, error in
    guard let unwrappedResponse = response else { return }
    for route in unwrappedResponse.routes {
        self.mapView.add(route.polyline)
        self.mapView.setVisibleMapRect(route.polyline.boundingMapRect, animated: true)
    }
}

在研究时我发现了这个链接：http://www.apple.com/in/ios/feature-availability/

在 地图：路线 部分中未列出印度，因此我认为我无法在我的应用中使用此功能：（

我熟悉谷歌地图，但有没有其他选择可以解决这个问题，最小化本地服务转移？

Answer 1

这就是我所做的：

1.从谷歌地图api：        ＆＃34; http://maps.google.com/maps?output=dragdir&saddr=%@&daddr=%@＆＃34;通过        通过源和目的地响应我收到了        路线点。



然后我编码了那些点



使用该点我绘制了折线并将折线添加到   苹果地图

请参阅ObjectiveC中的此代码：

// Route
#pragma mark --------------------- Custom Methods For Displaying Route ---------------------

-(NSArray*) calculateRoutesFrom:(CLLocationCoordinate2D) f to: (CLLocationCoordinate2D) t {

    NSString* saddr = [NSString stringWithFormat:@"%f,%f", f.latitude, f.longitude];
    NSString* daddr = [NSString stringWithFormat:@"%f,%f", t.latitude, t.longitude];

    NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.google.com/maps?output=dragdir&saddr=%@&daddr=%@", saddr, daddr];
    NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];
    NSLog(@"api url: %@", apiUrl);
    NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl];
    NSString* encodedPoints = [apiResponse stringByMatching:@"points:\\\"([^\\\"]*)\\\"" capture:1L];

    return [self decodePolyLine:[encodedPoints mutableCopy]];
}


-(NSMutableArray *)decodePolyLine: (NSMutableString *)encoded {
    [encoded replaceOccurrencesOfString:@"\\\\" withString:@"\\"
                                options:NSLiteralSearch
                                  range:NSMakeRange(0, [encoded length])];
    NSInteger len = [encoded length];
    NSInteger index = 0;
    NSMutableArray *array = [[NSMutableArray alloc] init];
    NSInteger lat=0;
    NSInteger lng=0;
    while (index < len) {
        NSInteger b;
        NSInteger shift = 0;
        NSInteger result = 0;
        do {
            b = [encoded characterAtIndex:index++] - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        NSInteger dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
        lat += dlat;
        shift = 0;
        result = 0;
        do {
            b = [encoded characterAtIndex:index++] - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        NSInteger dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
        lng += dlng;
        NSNumber *latitude = [[NSNumber alloc] initWithFloat:lat * 1e-5];
        NSNumber *longitude = [[NSNumber alloc] initWithFloat:lng * 1e-5];
        printf("[%f,", [latitude doubleValue]);
        printf("%f]", [longitude doubleValue]);
        CLLocation *loc = [[CLLocation alloc] initWithLatitude:[latitude floatValue] longitude:[longitude floatValue]];
        [array addObject:loc];
    }

    return array;
}

-(void) updateRouteView {
    CGContextRef context = CGBitmapContextCreate(nil,
                                                  _imageViewForRoute.frame.size.width,
                                                  _imageViewForRoute.frame.size.height,
                                                  8,
                                                  4 * _imageViewForRoute.frame.size.width,
                                                  CGColorSpaceCreateDeviceRGB(),
                                                  kCGImageAlphaPremultipliedLast);

    CGContextSetStrokeColorWithColor(context, _colorForRouteLine.CGColor);
    CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1.0);
    CGContextSetLineWidth(context, 1.0);

    for(int i = 0; i < _arraForRoutePoints.count; i++) {
        CLLocation* location = [_arraForRoutePoints objectAtIndex:i];
        CGPoint point = [_mapViewForLocation convertCoordinate:location.coordinate toPointToView:_imageViewForRoute];

        if(i == 0) {
            CGContextMoveToPoint(context, point.x, _imageViewForRoute.frame.size.height - point.y);
        } else {
            CGContextAddLineToPoint(context, point.x, _imageViewForRoute.frame.size.height - point.y);
        }
    }

    //CGContextRef context = UIGraphicsGetCurrentContext();
    CGFloat lengths[2];
    lengths[0] = 0;
    lengths[1] = 4 * 2;
    CGContextSetLineCap(context, kCGLineCapRound);
    CGContextSetLineWidth(context, 4);
    CGContextSetLineDash(context, 0.0f, lengths, 2);

    CGContextStrokePath(context);


    CGImageRef image = CGBitmapContextCreateImage(context);
    UIImage* img = [UIImage imageWithCGImage:image];

    _imageViewForRoute.image = img;
    CGContextRelease(context);

}

-(void) centerMap {
    MKCoordinateRegion region;

    CLLocationDegrees maxLat = -90;
    CLLocationDegrees maxLon = -180;
    CLLocationDegrees minLat = 90;
    CLLocationDegrees minLon = 180;
    for(int idx = 0; idx < _arraForRoutePoints.count; idx++)
    {
        CLLocation* currentLocation = [_arraForRoutePoints objectAtIndex:idx];
        if(currentLocation.coordinate.latitude > maxLat)
            maxLat = currentLocation.coordinate.latitude;
        if(currentLocation.coordinate.latitude < minLat)
            minLat = currentLocation.coordinate.latitude;
        if(currentLocation.coordinate.longitude > maxLon)
            maxLon = currentLocation.coordinate.longitude;
        if(currentLocation.coordinate.longitude < minLon)
            minLon = currentLocation.coordinate.longitude;
    }
    region.center.latitude     = (maxLat + minLat) / 2;
    region.center.longitude    = (maxLon + minLon) / 2;
    region.span.latitudeDelta  = maxLat - minLat;
    region.span.longitudeDelta = maxLon - minLon;

    MKCoordinateSpan coordinateSpan = MKCoordinateSpanMake(0.02, 0.02);
     MKCoordinateRegion coordinateRegion = MKCoordinateRegionMake(region.center, coordinateSpan);

    [_mapViewForLocation setRegion:coordinateRegion animated:TRUE];
    [_mapViewForLocation regionThatFits:coordinateRegion];

}

// Route
- (IBAction)fnForShowRouteButtonClicked:(id)sender {

    _arraForRoutePoints = [self calculateRoutesFrom:_sourceLocation to:_destinationLocation];

    [self updateRouteView];
    [self centerMap];


}

参考链接你需要Swift：

Draw polyline using Swift
http://benscheirman.com/2014/06/regex-in-swift/（用于编码和解码）

iOS苹果映射美国境外的可用性

1 个答案: