我已经使用 MKlocalSearch 实现了一个 UISearchBar，它使用户能够搜索一个区域内的所有位置。我已经解析了 Json 格式的信息，其中包含位置和与该位置关联的企业名称，并在这些坐标处放置了注释。我希望我的 SearchBar 只搜索我在用户位置 75 英里范围内放置注释的位置，如果用户要搜索它们，则不会识别任何其他位置。我希望搜索词是 clubName 这也是与每个 Json 对象相关联的一条信息。换句话说，如果我要搜索俱乐部“Roxy”，如果用户在 75 英里范围内，它将显示在过滤器中，但如果我要搜索“家得宝” 由于没有为该位置设置注释，因此不会显示任何内容。这是我当前的代码。
#import "ViewController.h"
#import "DetailController.h"
#import "Annotation.h"
#import "City.h"
@interface ViewController (){
MKLocalSearch *localSearch;
MKLocalSearchResponse *results;
}
@property (nonatomic, strong) IBOutlet DetailController *detailViewController;
@end
#define getDatalURL @"http://www.club-hop.com/apptest.php"
@implementation ViewController
@synthesize mapView,jsonArray,citiesArray;
- (void)viewDidLoad
{
[super viewDidLoad];
[self retrieveData];
UINavigationBar *bar= [self.navigationController navigationBar];
[bar setTintColor:[UIColor blackColor]];
self.detailViewController = [[DetailController alloc] init];
[self.searchDisplayController setDelegate:self];
[self.ibSearchBar setDelegate:self];
//Zoom the map to current location.
[self.mapView setShowsUserLocation:YES];
[self.mapView setUserInteractionEnabled:YES];
[self.mapView setUserTrackingMode:MKUserTrackingModeFollow];
City * cityObject;
// load external page into UIWebView
NSMutableArray * locations= [[NSMutableArray alloc]init];
CLLocationCoordinate2D location;
Annotation * myAnn;
for(int u=0; u<citiesArray.count;u++){
cityObject=[citiesArray objectAtIndex:u];
myAnn=[[Annotation alloc]init];
myAnn.city=cityObject; // Store the city object on the annotation
NSNumber *aLat= cityObject.Latitude;
NSNumber *aLon= cityObject.Longitude;
double lat = [aLat doubleValue];
double lon = [aLon doubleValue];
location.latitude= lat;
location.longitude=lon;
myAnn.coordinate = location;
myAnn.title=cityObject.clubName;
myAnn.subtitle=cityObject.cityName;
[locations addObject:myAnn];}
[self.mapView addAnnotations:locations];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//class methods
-(void) retrieveData{
NSURL * url= [NSURL URLWithString:getDatalURL];
NSData * data= [NSData dataWithContentsOfURL:url];
jsonArray= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
//setup cities array
citiesArray=[[NSMutableArray alloc]init];
for(int i=0; i<jsonArray.count;i++){
NSString * cID= [[jsonArray objectAtIndex:i] objectForKey:@"id"];
NSString * cName= [[jsonArray objectAtIndex:i] objectForKey:@"cityName"];
NSString * cCountry= [[jsonArray objectAtIndex:i] objectForKey:@"cityCountry"];
NSString * cLine= [[jsonArray objectAtIndex:i] objectForKey:@"clubLine"];
NSString * pri=[[jsonArray objectAtIndex:i] objectForKey:@"price"];
NSString * promo=[[jsonArray objectAtIndex:i] objectForKey:@"promo"];
NSString * camera=[[jsonArray objectAtIndex:i] objectForKey:@"camera"];
NSString * clName= [[jsonArray objectAtIndex:i] objectForKey:@"clubName"];
NSNumber * cLatitude= [[jsonArray objectAtIndex:i] objectForKey:@"Latitude"];
NSNumber * cLongitude= [[jsonArray objectAtIndex:i] objectForKey:@"Longitude"];
[citiesArray addObject:[[City alloc]initWithCityName:cName andCityCountry:cCountry andClubName:clName andClubLine:cLine andPrice:pri andPromo:promo andCamera:camera andLatitude:cLatitude andLongitude:cLongitude andCityId:cID]];
}
}
#pragma mark - MKMapViewDelegate
// user tapped the disclosure button in the callout
//
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard"
bundle:nil];
self.detailViewController = [storyboard instantiateViewControllerWithIdentifier:@"Page2"];
Annotation *myAnnotation=(Annotation *)view.annotation;
self.detailViewController.city=myAnnotation.city;
[self.navigationController pushViewController:self.detailViewController animated:YES];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *pin=nil;
if ([annotation isKindOfClass:[Annotation class]])
{
pin=(MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"myAnnotation"];
if (pin == nil)
{
pin=[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"myAnnotation"];
pin.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pin.image=[UIImage imageNamed:@"mappin.png"];
pin.centerOffset=CGPointMake(0.0, pin.image.size.height/-2);
pin.canShowCallout=YES;
}
}
return pin;
}
#pragma mark - Search Methods
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
// Cancel any previous searches.
[localSearch cancel];
// Perform a new search.
MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
request.naturalLanguageQuery = searchBar.text;
request.region = self.mapView.region;
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
localSearch = [[MKLocalSearch alloc] initWithRequest:request];
[localSearch startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error){
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
if (error != nil) {
[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Map Error",nil)
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:NSLocalizedString(@"OK",nil) otherButtonTitles:nil] show];
return;
}
if ([response.mapItems count] == 0) {
[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"No Results",nil)
message:nil
delegate:nil
cancelButtonTitle:NSLocalizedString(@"OK",nil) otherButtonTitles:nil] show];
return;
}
results = response;
[self.searchDisplayController.searchResultsTableView reloadData];
}];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [results.mapItems count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *IDENTIFIER = @"SearchResultsCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:IDENTIFIER];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:IDENTIFIER];
}
MKMapItem *item = results.mapItems[indexPath.row];
cell.textLabel.text = item.name;
cell.detailTextLabel.text = item.placemark.addressDictionary[@"Street"];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[self.searchDisplayController setActive:NO animated:YES];
MKMapItem *item = results.mapItems[indexPath.row];
[self.mapView setCenterCoordinate:item.placemark.location.coordinate animated:YES];
[self.mapView setUserTrackingMode:MKUserTrackingModeNone];
}
@end
视图控制器.h
#import <UIKit/UIKit.h>
#import <Mapkit/Mapkit.h>
@interface ViewController : UIViewController <MKMapViewDelegate>
@property (weak, nonatomic) IBOutlet MKMapView *mapView;
@property (nonatomic, strong) NSMutableArray * jsonArray;
@property (nonatomic, strong) NSMutableArray * citiesArray;
@property (strong, nonatomic) IBOutlet UISearchBar *ibSearchBar;
-(void) retrieveData;
@end