iOS 苹果地图在美国以外的可用性

Posted 2023-02-23

【中文标题】iOS 苹果地图在美国以外的可用性

【英文标题】：iOS apple maps availability outside U.S

【发布时间】：2016-11-15 09:39:34

【问题描述】：

我正在尝试将 Apple 地图集成到我的 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，并且会在控制台中简单地打印大量消息。

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，它给了我警告，“找不到路线”！

当我在模拟器中使用美国的两个预定义位置时，它正确地绘制了路线以及替代路线。所以我得出的结论是，Apple Map 服务在美国以外（尤其是印度）非常有限。

我想尽可能多地使用原生服务，但现在这似乎很困难。有人知道这个问题吗？如果是这种情况，那么其他选择是什么？

以下是两种情况的代码示例：

印度（无结果）：

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)
    

美国（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：路线部分中没有列出印度，所以我认为我无法在我的应用中使用此功能:(

我对 Google 地图很熟悉，但有没有其他方法可以通过从本地服务进行最小化来解决这个问题？

【问题讨论】：

您可以在苹果地图本身中执行此操作。只需从 google api ("maps.google.com/…) 获取路线点并使用该点在苹果地图中绘制路径..

@SuhasPatil 谢谢，但我认为使用谷歌地图完成所有其他任务也是一个更好的选择，对吧？

是的，当然……那会更好……！

【参考方案1】：

这是我所做的：

1.来自谷歌地图api： “http://maps.google.com/maps?output=dragdir&saddr=%@&daddr=%@”作者 传递源和目标作为响应，我收到了 路线点。

然后我对这些点进行了编码

使用该点我绘制了折线并将该折线添加到 苹果地图

在 ObjectiveC 中引用这段代码：

// 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];

引用 Swift 所需的链接：

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