ios - MKAnnotation 无需点击即可显示所有 pin 标题

Question

我像这样以编程方式添加多个注释:

- (void)addAnnotations{
    NSInteger i;
    CLLocationCoordinate2D location;

    for ( i = 0 ; i < [storeLatitude count] ; i ++ ){
        location.latitude = [[storeLatitude objectAtIndex:i] floatValue];
        location.longitude = [[storeLongitude objectAtIndex:i] floatValue];

        MapViewAnnotation *newAnnotation = [[MapViewAnnotation alloc] initWithTitle:[listOfStores objectAtIndex:i] andCoordinate:location];
        [self.mapView addAnnotation:newAnnotation];
        [newAnnotation release];    
    }
}

是否可以在不点击的情况下显示所有图钉的标题？

Answer 1

声明一个数组来存储所有注释并使用 MKMapView 的 setSelectedAnnotations:(NSArray *) 方法

- (void)addAnnotations {

    NSMutableArray *annotationArray = [[NSMutableArray alloc]init];
    NSInteger i;
    CLLocationCoordinate2D location;

    for ( i = 0 ; i < [storeLatitude count] ; i ++ ) {
        location.latitude = [[storeLatitude objectAtIndex:i] floatValue];
        location.longitude = [[storeLongitude objectAtIndex:i] floatValue];

        MapViewAnnotation *newAnnotation = [[MapViewAnnotation alloc] initWithTitle:    [listOfStores objectAtIndex:i] andCoordinate:location];
        [annotationArray addObject:newAnnotation];
        [self.mapView addAnnotation:newAnnotation];    
    }
    [mapView setSelectedAnnotations:annotationArray];
}