我正在编写一个使用MapKit的应用程序。我已经实现了MKLocalSearch，并返回了MKMapItem的数组。但是，我想知道是否有可能获得这些项目中每个项目的类别。例如，在地图应用程序中，为商店，酒店，火车站等显示不同的图标。此外，如果您查看地标。您将获得一个类别标签，例如杂货店。作为开发人员，我可以访问地图项的该信息吗？如果是这样，我想知道怎么做。
谢谢
是的，你可以得到这个信息。有关搜索位置的信息详细信息，请参阅下面的方法。
我担心您只能从MKPlacemark那里获得地址详细信息。
现在你要做的是从MKPlacemark获取地址详细信息，你需要借助任何开源API，这些API可以帮助你将地址分类到一些标签/注释中。
其中一个好的API是Mapbox，但不幸的是它是付费的。
因此，从第三方API您可以进行神奇的搜索。我没有搜索过某种API/WebService，但它应该在那里。
目标 C 代码：
- (void) searchForPlace:(NSString *) keyWord {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
request.naturalLanguageQuery = keyWord; // @"restaurant"
MKCoordinateSpan span = MKCoordinateSpanMake(.1, .1);
CLLocationCoordinate2D location = self.mapView.centerCoordinate;
request.region = MKCoordinateRegionMake(location, span);
MKLocalSearch *search = [[MKLocalSearch alloc] initWithRequest:request];
[search startWithCompletionHandler:
^(MKLocalSearchResponse *response, NSError *error) {
[self.txtSearch setEnabled:YES];
[self removeMapOverlay];
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
if (!error) {
// Result found
@try {
if (response.mapItems && [response.mapItems count] > 0) {
for (MKMapItem *item in response.mapItems) {
MKPlacemark *placeMark = item.placemark;
// Address details
NSDictionary *address = placeMark.addressDictionary;
NSString *titleString = @"";
NSString *subtitleString = @"";
NSString *name = @"";
NSString *Thoroughfare = @"";
NSString *State = @"";
NSString *City = @"";
NSString *Country = @"";
name = [address objectForKey:@"Name"] ? [address objectForKey:@"Name"] : @"";
Thoroughfare = [address objectForKey:@"Thoroughfare"] ? [address objectForKey:@"Thoroughfare"] : @"";
State = [address objectForKey:@"State"] ? [address objectForKey:@"State"] : @"";
City = [address objectForKey:@"City"] ? [address objectForKey:@"City"] : @"";
Country = [address objectForKey:@"Country"] ? [address objectForKey:@"Country"] : @"";
titleString = [NSString stringWithFormat:@"%@ %@", name, Thoroughfare];
subtitleString = [NSString stringWithFormat:@"%@ %@ %@", State, City, Country];
CustomAnnotation *annotation = [[CustomAnnotation alloc] initWithTitle:titleString subTitle:subtitleString detailURL:item.url location:placeMark.location.coordinate];
[self.mapView addAnnotation:annotation];
}
[self mapView:self.mapView regionDidChangeAnimated:YES];
}
}
@catch (NSException *exception) {
NSLog(@"Exception :%@",exception.description);
}
} else {
NSLog(@"No result found.");
}
}];
}
斯威夫特代码：
func searchForPlace(keyword: String) {
UIApplication.sharedApplication().networkActivityIndicatorVisible = true
var requset = MKLocalSearchRequest()
requset.naturalLanguageQuery = keyword
let span = MKCoordinateSpanMake(0.1, 0.1)
let region = MKCoordinateRegion(center: self.mapView.centerCoordinate, span: span)
var search = MKLocalSearch(request: requset)
search.startWithCompletionHandler { (var response: MKLocalSearchResponse!, var error: NSError!) -> Void in
UIApplication.sharedApplication().networkActivityIndicatorVisible = false
if (error != nil) {
// Result found
if (response.mapItems != nil && response.mapItems.count > 0) {
for item: MKMapItem! in response.mapItems as [MKMapItem] {
var placeMark = item.placemark as MKPlacemark!
// Address details...
var address = placeMark.addressDictionary as NSDictionary!
var titleString: String!
var subtitleString: String!
var name: String!
var Thoroughfare: String!
var State: String!
var City: String!
var Country: String!
var emptyString: String! = " "
name = (address.objectForKey("name") != nil ? address.objectForKey("name") : emptyString) as String
Thoroughfare = (address.objectForKey("Thoroughfare") != nil ? address.objectForKey("Thoroughfare") : emptyString) as String
State = (address.objectForKey("State") != nil ? address.objectForKey("State") : emptyString) as String
City = (address.objectForKey("City") != nil ? address.objectForKey("City") : emptyString) as String
Country = (address.objectForKey("Country") != nil ? address.objectForKey("Country") : emptyString) as String
titleString = String(format: "%@ %@", name, Thoroughfare)
subtitleString = String(format: "%@ %@ %@", State, City, Country)
var customAnnotation = CustomAnnotation(coordinate: placeMark.location.coordinate, title: titleString, subtitle: subtitleString, detailURL: item.url)
self.mapView.addAnnotation(customAnnotation)
}
self.mapView(self.mapView, regionDidChangeAnimated: true)
}
}
}
}
我知道
这是一个老问题，但我偶然发现了同样的需求 - 从MKMapItem对象获取类别信息。
问：能否从MKMapItem获取类别信息？
答：是的，这是可能的。您可以从地图项目中提取此信息。
问：苹果允许这样做吗？
答：不是真的...您必须使用键值来获取这些属性，因此从技术上讲，它将访问私有框架。但是，你没有问它是否必须"允许"。
这是我有一个很好的方法（它在 Objc 中，但为您将其转换为 swift，所以如果有任何错误，请原谅我 - 尚未测试过）
// Let "item" be some MKMapItem
let geo_place = item.value(forKey: "place") as! NSObject
let geo_business = geo_place.value(forKey: "business") as! NSObject
let categories = geo_business.value(forKey: "localizedCategories") as! [AnyObject]
var categoriesList = [Any]()
for geo_cat in categories.first as! [AnyObject] {
let level = geo_cat.value(forKeyPath: "level") as! Int
let geo_loc_name = geo_cat.value(forKeyPath: "localizedNames") as! NSObject
let name = (geo_loc_name.value(forKeyPath: "name") as! [String]).first
categoriesList.append(["level" : NSNumber(value: level), "name" : name as Any])
}
这为您提供了以下类别：
{
level : 1;
name : "Coffee & Tea"
}
func retriveCategory(item:MKMapItem) -> [String] {
let geo_place = item.value(forKey: "place") as! NSObject
let geo_business = geo_place.value(forKey: "business") as! NSObject
let categories = geo_business.value(forKey: "localizedCategories") as! [AnyObject]
var categoriesList = [String]()
if let listCategories = (categories.first as? [AnyObject]) {
for geo_cat in listCategories {
let geo_loc_name = geo_cat.value(forKeyPath: "localizedNames") as! NSObject
let name = (geo_loc_name.value(forKeyPath: "name") as! [String]).first!
categoriesList.append(name)
}
}
return categoriesList
}
另一个版本的答案@Will冯·乌尔里希