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如何使用现有注释添加新注释?

markerclusterer mkmapview annotations objective-c ios

Ram · 技术社区 · 8 年前

在我的申请中,我被发布了从特定位置录制的视频。我可以从另一个服务响应中获得已发布位置详细信息的列表。最初,我得到了发布的位置详细信息,并将其显示在MapView上。在MapView中,接点显示为效果,所以我用 kingpin .

在下面,我已将注释加载到地图上。

- (void)loadLocations:(NSArray *)arrayValues 
{
    _annotationArray = arrayValues;

    [self.clusteringController setAnnotations:[self reSetannotations]];

    [self.mapView setZoomEnabled:YES];

    [self.mapView setCenterCoordinate:self.mapView.userLocation.coordinate];

    [self.mapView setUserTrackingMode:MKUserTrackingModeFollow];


    KPGridClusteringAlgorithm *algorithm = [KPGridClusteringAlgorithm new];

    algorithm.annotationSize = CGSizeMake(25, 50);

    algorithm.clusteringStrategy = KPGridClusteringAlgorithmStrategyTwoPhase;

    self.clusteringController = [[KPClusteringController alloc] initWithMapView:self.mapView
                                                            clusteringAlgorithm:algorithm];
    self.clusteringController.delegate = self;

    self.clusteringController.animationOptions = UIViewAnimationOptionCurveEaseOut;

    [self.clusteringController setAnnotations:[self annotations]];

    NSString * lastobjlat;

    double miles;

    CLLocation * location = [COMMON currentLocation];

    lastobjlat = [NSString stringWithFormat:@"%f",location.coordinate.latitude];

    miles = 1.;

    double scalingFactor = ABS( (cos(2 * M_PI * [lastobjlat floatValue] / 360.0) ));

    MKCoordinateSpan span;

    span.latitudeDelta = miles/69.0;

    span.longitudeDelta = miles/(scalingFactor * 69.0);

    MKCoordinateRegion region;

    region.span = span;

    region.center = location.coordinate;

    [self.mapView setRegion:region animated:YES];

    self.mapView.showsUserLocation = YES;


    //Call in the below selectAnnotationAction method when I came to this, after I published new one on existed or new locations
    if (COMMON.isRecentPublication == YES) {

        COMMON.isRecentPublication = NO;

        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

            [self selectAnnotationAction];
        });
    }
}

- (NSArray *)reSetannotations 
{
    NSMutableArray *annotations = [NSMutableArray array];

    return annotations;
}

- (NSArray *)annotations {

    CLLocationCoordinate2D locationPort;

    NSMutableArray *annotations = [NSMutableArray array];

    NSString *latitude, *longitude;

    if ([_annotationArray count] > 0) {

        for (int i = 0; i <[_annotationArray count]; i++){

            latitude = [NSString stringWithFormat:@"%@",[[_annotationArray objectAtIndex:i] valueForKey:@"latitude"]];

            latitude = [latitude stringByReplacingOccurrencesOfString:@"\n" withString:@""];

            latitude = [latitude stringByReplacingOccurrencesOfString:@"\t" withString:@""];

            longitude = [NSString stringWithFormat:@"%@",[[_annotationArray objectAtIndex:i] valueForKey:@"longitude"]];

            longitude = [longitude stringByReplacingOccurrencesOfString:@"\n" withString:@""];

            longitude = [longitude stringByReplacingOccurrencesOfString:@"\t" withString:@""];

            latitude = [NSString replaceEmptyStringInsteadOfNull:latitude];

            longitude = [NSString replaceEmptyStringInsteadOfNull:longitude];

            int publicationRatio   = [[[_annotationArray objectAtIndex:i] valueForKey:@"publicationRatio"] intValue];

            int publicationCount   = [[[_annotationArray objectAtIndex:i] valueForKey:@"publicationsCount"] intValue];

            int teazLocationId     = [[[_annotationArray objectAtIndex:i] valueForKey:@"objectId"] intValue];

            BOOL isUpgrade         = [[[_annotationArray objectAtIndex:i] valueForKey:@"isUpgraded"] boolValue];

            locationPort = CLLocationCoordinate2DMake([latitude doubleValue] ,
                                                      [longitude doubleValue]);

            //TODO : This is my custom annotation method

            MapAnnotation *a1 = [[MapAnnotation alloc] initWithCoordinate:locationPort
                                                                            tag:i
                                                               publicationRatio:publicationRatio
                                                               publicationCount:publicationCount
                                                                 teazLocationId:teazLocationId isUpgraded:isUpgrade];

            a1.itemindex = i + 1;

            a1.publicationRatio = publicationRatio;

            a1.publicationCount = publicationCount;

            a1.teazLocationId = teazLocationId;

            a1.isUpgraded = isUpgrade;

            a1.coordinate = CLLocationCoordinate2DMake([latitude doubleValue] ,
                                                       [longitude doubleValue] );
            [annotations addObject:a1];

            if (COMMON.isRecentPublication == YES) {

                if ([COMMON.recentPublicationLocationID  isEqual: @(publishedLocationId)]) {

                    _recentAnnotationView = [[MKPinAnnotationView alloc] initWithAnnotation:a1 reuseIdentifier:@"cluster"];

                }
            }
        }
    }

    return annotations;
}

在初始时间加载具有聚类效果的注释不是问题。但是,当我从相同或不同(也是新的)位置发布某个地图时,我需要重定向地图屏幕(发布部分是另一个屏幕),我需要用 活动pin图像 .

我创建了 最近发布位置ID 作为全局变量,并存储发布服务后响应中的recentPublishedLocationID。
那么这个返回类型方法 -(NSArray*)注释 (重定向到mapView后,我从另一个Web服务获得了位置详细信息,之后它将调用),

如果存在或不存在,我将与最近发布的版本进行比较。然后,如果存在,我已将自定义注释(包含最近发布的位置详细信息)分配给全局 MKPinAnnotationView实例-\u recentAnnotationView

然后我直接打电话给 -(void)加载位置:(NSArray*)阵列值

if (COMMON.isRecentPublication == YES)
{
    COMMON.isRecentPublication = NO;

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

        [self selectAnnotationAction];
    });
}

//选择注释操作

- (void)selectAnnotationAction {

    COMMON.isRecentPublication = NO;

    COMMON.recentPublicationLocationID = nil;

    [self mapView:self.mapView didSelectAnnotationView:_recentAnnotationView];
}

如果我直接通过详细信息至 DID选择注释视图 在活动引脚中 而不是 .

在活动引脚中 只有

因为在这种情况下,调用了didselect委托,我可以看到

因为其他管脚注释快速调用了viewForAnnotation委托,所以选定的管脚注释将变为未选定状态

这才是真正的问题。如何使用集群克服这一问题?

因为当我在地图上正确显示发布的位置细节时,它甚至应该具有聚类效果。是的,我将缩小以查看具有簇效果的管脚。

1 回复 | 直到 8 年前

Ram 8 年前

最后,我得到了解决方案,并使用 ClusterKit library 而不是 Kingpin .

这个工具确实有助于我实现附加注释,并根据我的需求定制所采用的每件事。

该工具支持Apple&具有目标c和Swift的Goole地图。