在 MKMap 视图中显示附近的餐厅

Question

在我的 iphone 应用程序中，我必须在地图视图中显示附近的餐馆，目前我在网页视图中使用谷歌地图网址。

但是如何使用本地 MKMap 视图显示当前位置 5000 米内附近的餐馆（我发现了我当前的位置 - 纬度和经度）

我想了解如何按照下面的屏幕截图来实现（也可以点击注释转到其详细信息）

有什么帮助吗？？提前致谢

Answer 1

在 iOS 6.1 中，您可以使用 MKLocalSearch，它是标准 iOS MapKit.framework 的一部分：

MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
request.naturalLanguageQuery = @"restaurant";
request.region = mapView.region;

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

    NSMutableArray *annotations = [NSMutableArray array];

    [response.mapItems enumerateObjectsUsingBlock:^(MKMapItem *item, NSUInteger idx, BOOL *stop) {
        CustomAnnotation *annotation = [[CustomAnnotation alloc] initWithPlacemark:item.placemark];

        annotation.title = item.name;
        annotation.subtitle = item.placemark.addressDictionary[(NSString *)kABPersonAddressStreetKey];
        annotation.phone = item.phoneNumber;

        [annotations addObject:annotation];
    }];

    [self.mapView addAnnotations:annotations];
}];

我的自定义注解只是一个MKPlacemark 加上一个标题和副标题：

@interface CustomAnnotation : MKPlacemark

@property (strong, nonatomic) NSString *title;
@property (strong, nonatomic) NSString *subtitle;
@property (strong, nonatomic) NSString *phone;

@end

如果您想在标注上看到披露指示符（以便您可以转换到另一个控制器以查看详细信息，您可以：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
    if (![annotation isKindOfClass:[CustomAnnotation class]])
        return nil;

    MKAnnotationView *annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation
                                                                       reuseIdentifier:@"CustomAnnotationView"];
    annotationView.canShowCallout = YES;
    annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

    return annotationView;
}

如果您想在用户单击标注附件时打开其他视图：

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
    if (![view.annotation isKindOfClass:[CustomAnnotation class]])
        return;
    CustomAnnotation *annotation = (CustomAnnotation *)view.annotation;

    ABRecordRef person = ABPersonCreate();
    ABRecordSetValue(person, kABPersonOrganizationProperty, (__bridge CFStringRef) annotation.title, NULL);

    if (annotation.phone)
    {
        ABMutableMultiValueRef phoneNumberMultiValue = ABMultiValueCreateMutable(kABMultiStringPropertyType);
        ABMultiValueAddValueAndLabel(phoneNumberMultiValue, (__bridge CFStringRef) annotation.phone, kABPersonPhoneMainLabel, NULL);
        ABRecordSetValue(person, kABPersonPhoneProperty, phoneNumberMultiValue, nil);
        CFRelease(phoneNumberMultiValue);
    }

    ABMutableMultiValueRef address = ABMultiValueCreateMutable(kABMultiDictionaryPropertyType);
    ABMultiValueAddValueAndLabel(address, (__bridge CFDictionaryRef) annotation.addressDictionary, kABWorkLabel, NULL);
    ABRecordSetValue(person, kABPersonAddressProperty, address, NULL);
    ABUnknownPersonViewController *personView = [[ABUnknownPersonViewController alloc] init];

    personView.unknownPersonViewDelegate = self;
    personView.displayedPerson = person;
    personView.allowsAddingToAddressBook = YES;

    [self.navigationController pushViewController:personView animated:YES];

    CFRelease(address);
    CFRelease(person);
}

- (void)unknownPersonViewController:(ABUnknownPersonViewController *)unknownPersonView didResolveToPerson:(ABRecordRef)person
{

}

有关更多信息（例如自定义注释视图、确定设备位置等），请参阅Location Awareness Programming Guide。

有关简单示例，请参阅https://github.com/robertmryan/MKMapView-custom-annotations。

Answer 2

首先参考这个 Google API Link https://developers.google.com/places/documentation/search 然后获取 id 并将其添加到 googleId 的参数中，然后将 radious 参数设置为 5000 值和 类型 设置值餐厅..

看我下面的例子..

NSString *str=[NSString  stringWithFormat:@"https://maps.googleapis.com/maps/api/place/search/json?location=%f,%f&radius=5000&types=%@&sensor=false&key=%@",currentLocation.latitude,currentLocation.longitude,@"restaurant",@"AIzaSyB7YTFTYyk9eb8ULNGxoy06-b_0DUOqdrY"];
NSLog(@"\n\n URL %@",str);
NSURL *strurl=[NSURL URLWithString:[str stringByReplacingOccurrencesOfString:@"|" withString:@"%7C"]];
//    NSURL *strurl = [NSURL URLWithString:@"https://maps.googleapis.com/maps/api/place/search/json?location=-33.8670522,151.1957362&radius=500&types=food&name=harbour&sensor=false&key=AIzaSyB7YTFTYyk9eb8ULNGxoy06-b_0DUOqdrY"];

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:strurl];  
[request setDelegate:self];
[request startAsynchronous]; 

并在MKMapView 上实现这些完整记录，如下所示...

- (void)requestFinished:(ASIHTTPRequest *)request {

    // Use when fetching text data
    NSString *responseString = [request responseString];
    NSLog(@"\n\n>>>>......Response String >>> %@",responseString);

    if(responseString)
    {
        SBJSON *json = [[SBJSON alloc] init];
        NSError *error = nil;
        id result = [json objectWithString:responseString error:&error];

        if ([result isKindOfClass:[NSMutableArray class]]) 
        {
            NSLog(@"\n\n.......This is Mutable Array");
        }
        else 
        {
            if ([[result objectForKey:@"results"] count]>0) 
            {
                NSLog(@">>>>>>>> dict keys :%d \nFull Address : %@\n LatLong : %@ \n total result : %d", [[result objectForKey:@"results"] count],[[result objectForKey:@"results"]valueForKey:@"vicinity"],[[[result objectForKey:@"results"]valueForKey:@"geometry"]valueForKey:@"location"],[[result objectForKey:@"results"]count]);


                for (int i=0; i<[[result objectForKey:@"results"] count]; i++)     
                {
                    ann = [[MyAnnotation alloc] init];
                    ann.title = [[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"name"];
                    ann.subtitle = [[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"vicinity"];   

                    ann.annReferance=[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"reference"];

                    CLLocationCoordinate2D location;
                    location.latitude = [[[[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"geometry"]valueForKey:@"location"] valueForKey:@"lat"]doubleValue];
                    location.longitude = [[[[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"geometry"]valueForKey:@"location"] valueForKey:@"lng"] doubleValue];
                    ann.coordinate=location;
                    ann.annLocation=[NSString stringWithFormat:@"%f,%f",location.latitude,location.longitude];

                    //                    NSLog(@"\n\n rating %@",ann.annrating);
                    if ([[[[result objectForKey:@"results"]objectAtIndex:i] allKeys] containsObject:@"rating"]) 
                    {
                        // contains key
                        ann.annrating=[[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"rating"]stringValue];
                        NSLog(@"\n\n rating %@",ann.annrating);
                    }
                    else
                    {
                        ann.annrating=@"";
                    }
                    ann.annaddress=[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"vicinity"];
                    [mapView addAnnotation:ann];
                }
            }
        }
    }
}

这是我在我的应用程序中使用的代码，只需根据您的要求进行一些更改，您就会得到输出..

希望对你有帮助...