将 UIButton 添加到 mapkit 中的注释标注

Question

我想在特定位置的注释标注中添加一个自定义图像按钮。例如，搜索星巴克会显示星巴克位置的注释标记，当按下标记时，标注将显示一个按钮，然后将引导您到另一个带有星巴克信息的视图控制器。现在注释会在按下时显示该位置的地址，我如何将其更改为在我选择的自定义位置显示一个按钮？我对 xcode 很陌生，相对于我迄今为止如何设计我的应用程序，似乎找不到太多有用的信息。除了我不知道从哪里开始添加按钮之外，一切都按预期运行。

这是我的视图控制器

#import "ViewController.h"

@interface ViewController () <UISearchDisplayDelegate, UISearchBarDelegate>

@end

@implementation ViewController {
MKLocalSearch *localSearch;
MKLocalSearchResponse *results;
}

#pragma mark - View Lifecycle

- (void)viewDidLoad
{
[super viewDidLoad];
[self.searchDisplayController setDelegate:self];
[self.ibSearchBar setDelegate:self];

// Zoom the map to current location.
[self.ibMapView setShowsUserLocation:YES];
[self.ibMapView setUserInteractionEnabled:YES];
[self.ibMapView setUserTrackingMode:MKUserTrackingModeFollow];

}

#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.ibMapView.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.ibMapView addAnnotation:item.placemark];
[self.ibMapView selectAnnotation:item.placemark animated:NO];


[self.ibMapView setCenterCoordinate:item.placemark.location.coordinate animated:YES];

[self.ibMapView setUserTrackingMode:MKUserTrackingModeNone];

}

@end


#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>

@interface ViewController : UIViewController
@property (strong, nonatomic) IBOutlet UISearchBar *ibSearchBar;
@property (strong, nonatomic) IBOutlet MKMapView *ibMapView;
@end

Answer 1

您可以在viewForAnnotation 方法中将按钮设置为标注附件视图：

 - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
 {

      static NSString *AnnotationIdentifier = @"Annotation";

      if ([annotation isKindOfClass:MKUserLocation.class]) {
         return nil;
      }

      MKPinAnnotationView* pinAnnotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];

      if (!pinAnnotationView)
      {
           pinAnnotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] ;
           pinAnnotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
           pinAnnotationView.canShowCallout = YES;
      }

      return pinAnnotationView;
 }

然后您可以使用mapView:annotationView:calloutAccessoryControlTapped 委托方法在用户点击标注视图的控件时做出响应，并在这种情况下重定向到另一个视图控制器：

 -(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
 {
     InfoController *infoController = [[InfoController alloc] initWithNibName:@"InfoController" bundle:[NSBundle mainBundle]];

     /*
     here you can pass the necessary information to your InfoController
     */

     [self.navigationController pushViewController:infoController  animated:YES];
     [infoController  release];
 }

在此示例中，我使用 UINavigationController 来管理通过我的视图控制器的导航。

Answer 2

关于如何自定义标注视图的 SO 上有大量资源，例如 here 和 here。您还可以查看 Apple 的 MKAnnotationView 文档，尤其是子类化注释及其 MapCallouts 示例。