iOS的蘋果地圖可用性美國以外美國

Question

我想在我的iPhone應用程序中集成Apple Maps來顯示兩個位置之間的路線。但它不會顯示任何路線&將在控制檯中簡單打印大量消息。

我位於印度孟買。當我試圖使用iPhone上的官方地圖應用程序來搜索路線時，它給了我警告，'沒有找到路線'！

當我在模擬器中使用美國的兩個預定義位置時，它會正確繪製路線以及替代路線。所以我得出的結論是，蘋果地圖服務在美國以外地區是非常有限的（特別是在印度）。

我想盡可能使用本機服務，但現在看起來很難。有沒有人有關於這個問題的想法&它是這種情況，那麼其他的選擇是什麼？

以下是來自這兩種情況下的代碼示例：

印度（無結果）：

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) 
    } 
} 

美國（給了正確的路線）

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) 
    } 
} 

雖然研究，我發現此鏈接：http://www.apple.com/in/ios/feature-availability/

在地圖：地圖部分印度還沒有上市，所以我不認爲我將能夠使用此功能在我的應用程序:(

我所熟悉的谷歌地圖，但有沒有其他的選擇來解決這個問題，從本地服務的最小轉移？

Answer 1

這裏是我做的：

1.從谷歌地圖API： 「http://maps.google.com/maps?output=dragdir&saddr=%@&daddr=%@」由 傳遞的源和目標作爲迴應，我已經收到了 路線點。

然後，我已編碼的點

使用該點我畫折線和補充，折線 蘋果地圖

參考ObjectiveC中的代碼：

// 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]; 


} 

參考號呃鏈接，您將需要斯威夫特：

• Draw polyline using Swift
• http://benscheirman.com/2014/06/regex-in-swift/（編碼和解碼）