我正在编写一个使用MapKit的应用程序。我已经实现了MKLocalSearch，我得到了一个MKMapItem数组。但是我想知道是否可以获得这些项目的类别。例如，在地图应用程序中，为商店，酒店，火车站等显示了不同的图标。此外，如果您查看地点标记。您将获得一个类别标签，如Grocery。作为开发人员，我可以访问Map项目的信息吗？如果是这样，我想知道如何。
谢谢
答案 0 :(得分：4)
是的，您可以获得此信息。有关搜索位置的详细信息，请参阅以下方法。
我担心您只能从MKPlacemark获取地址详细信息。
现在您需要做的是，从MKPlacemark获取地址详细信息，您需要获取任何可帮助您将类别地址分类为某些标签/注释的开源API的帮助。
其中一个优秀的API是Mapbox，但遗憾的是它已付费。
因此，从第三方API，您可以进行神奇的搜索。我还没有搜索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.");
}
}];
}
Swift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)
}
}
}
}
答案 1 :(得分：0)
我知道这是一个古老的问题，但是我偶然发现了同样的需求-从MouseEvent对象获取类别信息。
问：：您可以从@HostListener('document:click', ['$event.target']) onClick(event) {
const parentEl = this.eRef.nativeElement.parentNode.tagName;
const path = [];
let currentElem = event;
while (currentElem) {
path.push(currentElem.tagName);
currentElem = currentElem.parentElement;
}
console.log('Clicked inside parent: ', path.includes(parentEl));
}
获取类别信息吗？
A：是的，这是可能的。您可以从地图项中拉出它。
问：这是Apple允许的吗？
A：并非如此。您必须使用键值来获取这些属性，因此从技术上讲，它们将访问私有框架。 但是，您没有询问是否必须“允许”。
这是我拥有的一种不错的方法（它在Objc中，但已为您转换为快捷方式，因此，如果有任何错误，请原谅我-尚未测试）
MKMapItem这为您提供了以下类别：
MKMapItem答案 2 :(得分：0)
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
}
@Will Von Ullrich的另一个答案