當我在地圖中放置多個引腳取決於不同的經度和緯度值。即時讓所有的針腳只在一個地方

Question

當我在地圖上放多個針腳取決於不同的經度和緯度值。即時讓所有的針腳在地圖上的一個地方。

我寫了這個代碼來放置多個引腳。

dealerMapView.mapType = MKMapTypeStandard; 
    dealerMapView.zoomEnabled =YES; 
    [dealerMapView setDelegate:nil]; 
    dealerMapView.scrollEnabled = YES; 
    dealerMapView.showsUserLocation = NO; 
    CLLocationCoordinate2D location; 

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

      NSString *lattitudeValue = [[delarsInfoArray objectAtIndex:i]objectForKey:@"LATITUDE" ]; 

      NSString *longitudeValue = [[delarsInfoArray objectAtIndex:i]objectForKey:@"LONGITUDE" ]; 
      CLLocationCoordinate2D pCoordinate ; 
    pCoordinate.latitude = [lattitudeValue floatValue]; 
    pCoordinate.longitude = [longitudeValue floatValue]; 
    MKCoordinateRegion region; 
    MKCoordinateSpan span; 
    span.latitudeDelta = 0.005; 
    span.longitudeDelta = 0.005; 
    region.span = span; 
    region.center = location; 
    [dealerMapView setRegion:region animated:YES]; 
    myAnnotation1 = [[MyAnnotation alloc] init]; 
    myAnnotation1.coordinate = location; 
    myAnnotation1.title = [[delarsInfoArray objectAtIndex:i]objectForKey:@"STORE"]; 
    [dealerMapView addAnnotation:myAnnotation1]; 
} 

Answer 1

試試這個代碼：

MKCoordinateSpan span; 
span.latitudeDelta = 0.2; 
span.longitudeDelta= 0.2; 

if([delarsInfoArray count] > 0){ 

    CLLocationCoordinate2D start; 
    NSString *lattitudeValue = [[delarsInfoArray objectAtIndex:0]objectForKey:@"LATITUDE" ]; 

    NSString *longitudeValue = [[delarsInfoArray objectAtIndex:j]objectForKey:@"LONGITUDE" ]; 

// create region, consisting of span and location 
    MKCoordinateRegion mapRegion; 
    mapRegion.span = span; 
    mapRegion.center = start; 
//Move the map to our location // 
    [dealerMapView setRegion:mapRegion animated:YES]; 
} 
// do not show pins and annotations more then 200 in the map at a time. 
for (int j = 0; j< ([delarsInfoArray count] < 200?[delarsInfoArray count]:200); j++) { 
    NSString *lattitudeValue = [[delarsInfoArray objectAtIndex:i]objectForKey:@"LATITUDE"]; 
      NSString *longitudeValue = [[delarsInfoArray objectAtIndex:i]objectForKey:@"LONGITUDE" ]; 

    CLLocationCoordinate2D pinLocation; 
    if(([lattitudeValue floatValue] != 0) && ([longitudeValue floatValue] != 0)) { 
     pinLocation.latitude = [lattitudeValue floatValue]; 
     pinLocation.longitude = [longitudeValue floatValue]; 
     if(pinLocation.latitude !=0 && pinLocation.longitude !=0) { 
      myAnnotation1 = [[MyAnnotation alloc] init]; 
      myAnnotation1.coordinate = location; 
      myAnnotation1.title = [[delarsInfoArray objectAtIndex:i] objectForKey: @"STORE"]; 
      [dealerMapView addAnnotation:myAnnotation1]; 
     } 
    } 
} 

我希望它可以幫助你！好運。乾杯！！