Regarding Map pin points that should display dynamically in iphone - iphone

Question

hi everyone i have a mapview where i have to drop pins on the map based on latitude and longitude where i used to get that from a webservice can any one help me out how to get and plot it on the map and also if i have plotted any pin on the map that should be reflected in the web application through the web-services only.

Answer 1

Checklist for Adding an Annotation to the Map
The steps for implementing and using annotations in your map-based application are shown below. These steps assume that your application incorporates an MKMapView object somewhere in its interface.
1. Define an appropriate annotation object using one of the following options:
Use the MKPointAnnotation class to implement a simple annotation. This type of annotation contains properties for specifying the title and subtitle strings to display in the annotation’s onscreen callout bubble.
(OR)
Define a custom object that conforms to the MKAnnotation protocol, as described in “Defining a Custom Annotation Object” . This type of annotation can store any type of data you want.
2. Define an annotation view to present the data on screen. How you define your annotation view depends on your needs and may be one of the following:
If the annotation can be represented by a static image, create an instance of the MKAnnotationView class and assign the image to its image property; see “Using the Standard Annotation Views” .
(OR)
If you want to use a standard pin annotation, create an instance of the MKPinAnnotationView class; see “Using the Standard Annotation Views” .
If a static image is insufficient for representing your annotation, subclass MKAnnotationView and implement the custom drawing code needed to present it.
3. Implement the mapView:viewForAnnotation: method in your map view delegate.
Your implementation of this method should dequeue an existing annotation view if one exists or create a new one. If your application supports multiple types of annotations, you must include logic in this method to create a view of the appropriate type for the provided annotation object.
4. Add your annotation object to the map view using the addAnnotation: or addAnnotations: method.
REFER HERE FOR COMPLETE REFERENCE.

Answer 2

try this code:- in storeListArr store the value from web service
-(void)loadingMap
{
[self.mapView setMapType:MKMapTypeStandard];
[self.mapView setZoomEnabled:YES];
[self.mapView setScrollEnabled:YES];
NSLog(#"storeListArr = %#",storeListArr);
for(int i=0; i<[storeListArr count];i++)
{
MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } };
region.center.latitude = [[[storeListArr objectAtIndex:0] objectForKey:#"lat"] floatValue];
region.center.longitude = [[[storeListArr objectAtIndex:0] objectForKey:#"long"] floatValue];
region.span.longitudeDelta = .05f;
region.span.latitudeDelta = .05f;
[self.mapView setRegion: region animated:YES];
MyAnnotations *ann = [[MyAnnotations alloc] init];
NSString *str=[[storeListArr objectAtIndex:i] objectForKey:#"store_name"];
NSLog(#"Address %#",storeAddress);
ann.title = str;
ann.coordinate = region.center;
[self.mapView addAnnotation:ann];
}
[self.mapView setDelegate:self];
}
for call out
- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation
{
NSLog(#"MKAnnotationView");
MKPinAnnotationView *pinView = nil;
if(annotation != mapView.userLocation)
{
static NSString *defaultPinID = #"com.invasivecode.pin";
pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil )
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
pinView.canShowCallout = YES;
UIImage *flagImage = [UIImage imageNamed:#"MapPin.png"];
pinView.image = flagImage;
pinView.opaque = NO;
UIButton *rightButton = [[UIButton alloc]initWithFrame:CGRectMake(0.0f,0.0f,28.0f,30.0f)];
[rightButton setImage:[UIImage imageNamed:#"MapArrow"] forState:UIControlStateNormal];
for (int i =0 ; i< [storeListArr count]; i++)
{
if ([[[storeListArr objectAtIndex:i] objectForKey:#"lat"] floatValue] == pinView.annotation.coordinate.latitude)
{
UIImageView *img = [[UIImageView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, 30.0f, 30.0f)];
if([[storeListArr objectAtIndex:i] objectForKey:#"imageUrl"])
{
[img setImage:[[storeListArr objectAtIndex:i] objectForKey:#"imageUrl"]];
}
pinView.leftCalloutAccessoryView =img;
[rightButton addTarget:self
action:#selector(showStoreDetail:)
forControlEvents:UIControlEventTouchUpInside];
pinView.rightCalloutAccessoryView = rightButton;
}
}
}
else
[mapView.userLocation setTitle:#"Current Location"];
return pinView;
}