CLGeocoder 曾经返回一个地标

我想复活this https://stackoverflow.com/questions/10417022/how-to-get-multiple-placemarks-from-clgeocoder and this https://stackoverflow.com/questions/11344188/clgeocoder-only-returning-one-placemark问题，因为问题仍然存在，所以我正在写一个新问题。

这是我的代码：

- (SVGeocoder*)initWithParameters:(NSMutableDictionary*)parameters completion:(SVGeocoderCompletionHandler)block {
self = [super init];

self.operationCompletionBlock = block;

Class cl = NSClassFromString(@"CLGeocoder");
if (cl != nil)
{
    if (self.geocoder_5_1 == nil) {
        self.geocoder_5_1 = [[cl alloc] init];
    }

    NSString *address = [parameters objectForKey:kGeocoderAddress];
    [self.geocoder_5_1 geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error) {
        NSMutableArray *svplacemarks = [NSMutableArray arrayWithCapacity:1];
        SVPlacemark *placemark;
        NSLog(@"placemarks[count] = %i", [placemarks count]);
        for (CLPlacemark *mark in placemarks) {
            placemark = [[SVPlacemark alloc] initWithPlacemark:mark];
            [svplacemarks addObject:placemark];
        }

        self.operationCompletionBlock([NSArray arrayWithArray:svplacemarks],nil,error);
    }];

}
else
{
    self.operationRequest = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://maps.googleapis.com/maps/api/geocode/json"]];
    [self.operationRequest setTimeoutInterval:kSVGeocoderTimeoutInterval];

    [parameters setValue:@"true" forKey:kGeocoderSensor];
    [parameters setValue:[[NSLocale currentLocale] objectForKey:NSLocaleLanguageCode] forKey:kGeocoderLanguage];
    [self addParametersToRequest:parameters];

    self.state = SVGeocoderStateReady;
}
return self;
}

这是我个人版本的 SVGeocoder（相当粗糙），使用 CLGeocoder 进行前向地理编码，并具有 iOS

我使用此解决方案是因为 Google 条款禁止使用地图 API，而不在 Google 地图上显示结果。

该问题与前面提到的问题相同：CLGeocoder 仅返回一个地标，并且日志打印出漂亮的

“地标[计数] = 1”。

我的问题是，有谁知道是否有另一种方法来检索前向地理编码，或者其他一些神奇的东西（苹果地图应用程序为我所做的同一查询显示多个标记，例如“通过罗马”）？

编辑罗布的解决方案

Class mkLocalSearch = NSClassFromString(@"MKLocalSearch");

if (mkLocalSearch != nil)
{
    NSString *address = [parameters objectForKey:kGeocoderAddress];
    MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];

    request.region = MKCoordinateRegionForMapRect(MKMapRectWorld);

    request.naturalLanguageQuery = address;

    MKLocalSearch *localsearch = [[MKLocalSearch alloc] initWithRequest:request];
    [localsearch startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error) {

        NSMutableArray *svplacemarks = [NSMutableArray arrayWithCapacity:1];
        SVPlacemark *placemark;
        NSLog(@"response.mapItems[count] = %i", [response.mapItems count]);

        for (MKMapItem *item in response.mapItems)
        {
            placemark = [[SVPlacemark alloc] initWithPlacemark:item.placemark];
            [svplacemarks addObject:placemark];
        }

        self.operationCompletionBlock([NSArray arrayWithArray:svplacemarks],nil,error);
    }];
}

这是一个有趣的解决方案，提供了另一种观点。不幸的是，即使我将区域设置为全球，我仍然得到一个不错的日志

响应.mapItems[计数] = 1

查询是“via roma”，这是意大利非常常见的街道名称，以至于我认为我们几乎可以在任何意大利城市找到它。

也许我做错了什么？

编辑 2 - 新测试：

将 World Rect 转换为 CLRegion，代码来自here https://gist.github.com/esromneb/3402711

    NSString *address = [parameters objectForKey:kGeocoderAddress];

    // make a conversion from MKMapRectWorld to a regular CLRegion
    MKMapRect mRect = MKMapRectWorld;
    MKMapPoint neMapPoint = MKMapPointMake(MKMapRectGetMaxX(mRect), mRect.origin.y);
    MKMapPoint swMapPoint = MKMapPointMake(mRect.origin.x, MKMapRectGetMaxY(mRect));

    float ewDelta= neMapPoint.x - swMapPoint.x;
    float nsDelta= swMapPoint.y - neMapPoint.y;

    MKMapPoint cMapPoint = MKMapPointMake(ewDelta / 2 + swMapPoint.x, nsDelta / 2 + neMapPoint.y);

    CLLocationCoordinate2D neCoord = MKCoordinateForMapPoint(neMapPoint);
    CLLocationCoordinate2D swCoord = MKCoordinateForMapPoint(swMapPoint);

    CLLocationCoordinate2D centerCoord = MKCoordinateForMapPoint(cMapPoint);

    CLLocationDistance diameter = [self getDistanceFrom:neCoord to:swCoord];

// i don't have the map like showed in the example so i'm trying to center the search area to the hypothetical center of the world
    CLRegion *clRegion = [[CLRegion alloc] initCircularRegionWithCenter:centerCoord radius:(diameter/2) identifier:@"worldwide"];
    [self.geocoder_5_1 geocodeAddressString:address inRegion: clRegion completionHandler:^(NSArray *placemarks, NSError *error) {
        NSMutableArray *svplacemarks = [NSMutableArray arrayWithCapacity:1];
        SVPlacemark *placemark;
        NSLog(@"placemarks[count] = %i", [placemarks count]);
        for (CLPlacemark *mark in placemarks) {
            placemark = [[SVPlacemark alloc] initWithPlacemark:mark];
            [svplacemarks addObject:placemark];
        }

        self.operationCompletionBlock([NSArray arrayWithArray:svplacemarks],nil,error);
    }];

...我得到通常的“地标 [count] = 1”

明显地，CLGeocoder如果地址获得多次命中（即该区域足够大，以至于简单的街道地址不明确），将返回多个地标，但如果该区域足够小或者提供的地址足够唯一，它通常只会找到一个匹配项。

虽然它不是通用解决方案，但有效的 iOS 6.1，您可以MKLocalSearch，它进行更一般的查找（包括企业名称等）：

MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
request.region = self.mapView.region;
request.naturalLanguageQuery = textField.text;

MKLocalSearch *localsearch = [[MKLocalSearch alloc] initWithRequest:request];
[localsearch startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error) {
    for (MKMapItem *item in response.mapItems)
    {
        Annotation *annotation = [[Annotation alloc] initWithPlacemark:item.placemark];
        annotation.title = item.name;
        annotation.phone = item.phoneNumber;
        annotation.subtitle = item.placemark.addressDictionary[(NSString *)kABPersonAddressStreetKey];
        [self.mapView addAnnotation:annotation];
    }
}];

我想这完全取决于您期望收到什么样的多次点击。