在 iOS 中自定义标记聚类中的标记图标

Question

有什么方法可以更改标记聚类中的默认标记图标吗？

这是我的代码...

- (void)viewDidLoad {
    [super viewDidLoad];

    // Set up the cluster manager with a supplied icon generator and renderer.
    id<GMUClusterAlgorithm> algorithm = [[GMUNonHierarchicalDistanceBasedAlgorithm alloc] init];
    id<GMUClusterIconGenerator> iconGenerator = [[GMUDefaultClusterIconGenerator alloc] init];
    id<GMUClusterRenderer> renderer = [[GMUDefaultClusterRenderer alloc] initWithMapView:googleMapView
                                                                    clusterIconGenerator:iconGenerator];
    clusterManager = [[GMUClusterManager alloc] initWithMap:googleMapView
                                                  algorithm:algorithm
                                                   renderer:renderer];

    // Register self to listen to both GMUClusterManagerDelegate and
    // GMSMapViewDelegate events.
    [clusterManager setDelegate:self mapDelegate:self];

}

- (void)loadView {
    // Create a GMSCameraPosition that tells the map to display the
    _camera = [GMSCameraPosition cameraWithLatitude:29.3117
                                          longitude:47.4818
                                               zoom:8];
    googleMapView = [GMSMapView mapWithFrame:CGRectZero camera:_camera];
    googleMapView.myLocationEnabled = YES;
    googleMapView.settings.compassButton = YES;
    googleMapView.settings.myLocationButton = YES;
    googleMapView.delegate = self;

    self.view = googleMapView;
}

-(void)setLocation:(CLLocation *)location
{
    CLLocationCoordinate2D center = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude);
    [googleMapView animateToLocation:center];
    [googleMapView animateToZoom:12];

    NSMutableArray *array = [NSMutableArray arrayWithObjects:
                             @"29.0827,48.1363",
                             @"29.2679,47.9927",
                             @"29.348706, 48.092425",
                             @"29.340925, 48.088477",
                             @"29.324912, 48.089850",
                             @"29.330599, 47.990630",
                             @"29.300364, 47.960589",
                             @"29.271917, 47.918017",
                             @"29.3032,47.936", nil];

    //remove all clusters before adding clusters
    [clusterManager clearItems];

    for (int i = 0; i < [array count]; i++)
    {
        center = CLLocationCoordinate2DMake ([[array[i] componentsSeparatedByString:@","][0] floatValue], [[array[i] componentsSeparatedByString:@","][1] floatValue]);

        // Add items to the cluster manager.
        NSString *name = nil;//[NSString stringWithFormat:@"Item %d", i];
        id<GMUClusterItem> item =[[POIItem alloc] initWithPosition:center
                                                              name:name];
        [clusterManager addItem:item];
    }
    // Call cluster() after items have been added
    // to perform the clustering and rendering on map.
    [clusterManager cluster];
}

请指导我...

Answer 1

我看到您使用了 google-maps-ios-utils。问题是还没有 API 用于更改标记的图标。您只能直接在库的代码中执行。我已将我的自定义代码粘贴到方法中

- (GMSMarker *)markerWithPosition:(CLLocationCoordinate2D)position
                         from:(CLLocationCoordinate2D)from
                     userData:(id)userData
                  clusterIcon:(UIImage *)clusterIcon
                     animated:(BOOL)animated{
//...
    if (clusterIcon != nil) {
        marker.icon = clusterIcon;
        marker.groundAnchor = CGPointMake(0.5, 0.5);
    } else {
    if([[marker.userData class] isSubclassOfClass:[POIItem class]]){
        POIItem *item = (POIItem *)marker.userData;
        MarkerIcon* markerView = (MarkerIcon *)[[NSBundle mainBundle] loadNibNamed:@"MarkerIcon" owner:marker options:nil][0];
        marker.iconView = markerView;
        marker.groundAnchor = CGPointMake(0.5, 0.5);
    }
   }
}

这样改代码可不是什么好办法。但当时我找不到更好的解决方案。

Answer 2

这个问题我已经解决了

我使用了 googleMaps Api version:8.1.

这是我的代码...

#import "Clustering/GMUClusterItem.h"

// Point of Interest Item which implements the GMUClusterItem protocol.
@interface POIItem : NSObject<GMUClusterItem>

@property(nonatomic, readonly) CLLocationCoordinate2D position;
@property(nonatomic, readonly) NSString *name;

- (instancetype)initWithPosition:(CLLocationCoordinate2D)position name:(NSString *)name;

@end

1.creat地图。

@interface BasicViewController ()<GMUClusterManagerDelegate, GMSMapViewDelegate,
                                  GMUClusterRendererDelegate>
@end

typedef NS_ENUM(NSInteger, ClusterAlgorithmMode) {
  kClusterAlgorithmGridBased,
  kClusterAlgorithmQuadTreeBased,
};

@implementation BasicViewController {
  GMSMapView *_mapView;
  GMUClusterManager *_clusterManager;
}

- (void)loadView {

    //创建地图
  GMSCameraPosition *camera =
      [GMSCameraPosition cameraWithLatitude:kCameraLatitude longitude:kCameraLongitude zoom:10];

  _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];

  self.view = _mapView;
}

2.creat GMUClusterManager 对象。

- (void)viewDidLoad {
  [super viewDidLoad];

    //添加标注算法方式
    id<GMUClusterAlgorithm> algorithm = [self algorithmForMode:kClusterAlgorithmQuadTreeBased];

    //标注icon
    id<GMUClusterIconGenerator> iconGenerator = [self iconGeneratorWithImages];//[self defaultIconGenerator];

   // CustomClusterIconGenerator *iconGenerator = [[CustomClusterIconGenerator alloc] init];

  GMUDefaultClusterRenderer *renderer =
      [[GMUDefaultClusterRenderer alloc] initWithMapView:_mapView
                                    clusterIconGenerator:iconGenerator];
  renderer.delegate = self;

  _clusterManager =
      [[GMUClusterManager alloc] initWithMap:_mapView algorithm:algorithm renderer:renderer];

  // Generate and add random items to the cluster manager.
    //将标注添加到地图上
  [self generateClusterItems];

  // Call cluster() after items have been added to perform the clustering and rendering on map.
    //展示
  [_clusterManager cluster];

  // Register self to listen to both GMUClusterManagerDelegate and GMSMapViewDelegate events.
  [_clusterManager setDelegate:self mapDelegate:self];

  UIBarButtonItem *removeButton =
      [[UIBarButtonItem alloc] initWithTitle:@"Remove"
                                       style:UIBarButtonItemStylePlain
                                      target:self
                                      action:@selector(removeClusterManager)];
  self.navigationItem.rightBarButtonItems = @[ removeButton ];
}

3.in方法：

/*You can set marker image here

 if [marker class] is POIItem.

 */

- (void)renderer:(id<GMUClusterRenderer>)renderer willRenderMarker:(GMSMarker *)marker {

  if ([marker.userData isKindOfClass:[POIItem class]]) {

    POIItem *item = marker.userData;

    marker.title = item.name;

    ******marker.icon = [UIImage imageNamed:@"register"];******

  }
}

在 iOS 中自定义标记聚类中的标记图标

customize marker icon in marker clustering in iOS

google-maps

objective-c

markerclusterer

ios