Show multiple pins on MKMap iPhone - iphone

Question

Hello friend in my application i am showing multiple pins on mapview. I have two mutablearray first for latitude and second for longitude each array have 10 values as i am showing bellow code in my method:
- (void)showAddressAllBusiness {
annotationsarray=[[NSMutableArray alloc] init];
NSLog(#"%d",[listOfLatitude count]);
NSLog(#"%d",[listOfLongitude count]);
NSLog(#"%d",[listOfPlaceName count]);
for (int i =0;i < [listOfLatitude count]; i++) {
MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } };
region.center.latitude = [[listOfLatitude objectAtIndex:i] doubleValue];
region.center.longitude = [[listOfLongitude objectAtIndex:i] doubleValue];
region.span.longitudeDelta = 0.1f;
region.span.latitudeDelta = 0.1f;
[self.mapViewCityGuide setRegion:region animated:YES];
[self.mapViewCityGuide setZoomEnabled:YES];
addAnnotation = [[AddressAnnotation alloc]init];
addAnnotation.mTitle = [NSString stringWithFormat:#"%#",[listOfPlaceName objectAtIndex:i]];
addAnnotation.coordinate = region.center;
[self.mapViewCityGuide addAnnotation:addAnnotation];
[annotationsarray addObject:addAnnotation];
}
NSLog(#"%d",[self.mapViewCityGuide.annotations count]);
[self centerMap];
}
when i am using latitude and longitude array values which is appear from webservice then
this code is not working fine and i am debugg the code then mapViewCityGuide getting nil or 0x0.
If i am using hard code latitude and longitude value as mention bellow in the array and call this method then it will show all pins on map how can i solve this problem
listOfPlaceName = [[NSMutableArray alloc] initWithObjects:#"test",#"test",#"test",#"pithempur",#"test",#"test",#"test",#"test", nil];
listOfLatitude = [[NSMutableArray alloc] initWithObjects:#"22.71957",#"23.17930",#"22.96123",#"22.60987",#"22.45260",#"22.55244",#"22.60000",#"22.68330", nil];
listOfLongitude = [[NSMutableArray alloc] initWithObjects:#"75.85773",#"75.78491",#"76.05141",#"75.69644",#"75.94197",#"75.75653",#"75.30000",#"75.61670", nil];
[self showAddressAllBusiness];

Answer 1

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
mapView.delegate=self;
[mapView removeAnnotations:mapView.annotations];
NSMutableArray* annotations=[[NSMutableArray alloc] init];
for (int j=0; j<10; j++)
{
CLLocationCoordinate2D theCoordinate1;
theCoordinate1.latitude = [[NSString stringWithFormat:#"%i",10+j]doubleValue];
theCoordinate1.longitude = [[NSString stringWithFormat:#"%i",72+j]doubleValue];
//my annotation is mkannotation class
MyAnnotation* myAnnotation1=[[MyAnnotation alloc] init];
myAnnotation1.coordinate=theCoordinate1;
myAnnotation1.title=[NSString stringWithFormat:#"locatiion %i",j];
[mapView addAnnotation:myAnnotation1];
[annotations addObject:myAnnotation1];
}
NSLog(#"%d",[annotations count]);
MKMapRect flyTo = MKMapRectNull;
for (id <MKAnnotation> annotation in annotations) {
NSLog(#"fly to on");
MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);
if (MKMapRectIsNull(flyTo)) {
flyTo = pointRect;
} else {
flyTo = MKMapRectUnion(flyTo, pointRect);
}
}
mapView.visibleMapRect = flyTo;
}
#pragma mark MKMapViewDelegate
/*
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
return [kml viewForOverlay:overlay];
}
*/
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
NSLog(#"welcome into the map view annotation");
if ([annotation isKindOfClass:[MyAnnotation class]])
{
static NSString *AnnotationIdentifier = #"AnnotationIdentifier";
MKPinAnnotationView* pinView = [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
if (!pinView)
{
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
pinView.canShowCallout = YES;
pinView.animatesDrop = YES;
}
else
{
pinView.annotation = annotation;
pinView.tag=((MyAnnotation *)annotation).tag;
pinView.canShowCallout = YES;
pinView.animatesDrop = NO;
}
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
rightButton.frame=CGRectMake(0, 0, 14, 16);
[rightButton setBackgroundImage:[UIImage imageNamed:#"arrow_s5.png"] forState:UIControlStateNormal];
[rightButton setTitle:annotation.title forState:UIControlStateNormal];
rightButton.tag=((MyAnnotation *)annotation).tag;
[rightButton addTarget:self
action:#selector(showDetails:)
forControlEvents:UIControlEventTouchUpInside];
pinView.rightCalloutAccessoryView = rightButton;
return pinView;
}
return nil;
}

Answer 2

*Please try this code:-*
-(void)viewDidLoad
{
CLLocation *userLoc = mapView.userLocation.location;
CLLocationCoordinate2D userCoordinate = userLoc.coordinate;
NSLog(#"user latitude = %f",userCoordinate.latitude);
NSLog(#"user longitude = %f",userCoordinate.longitude);
mapView.delegate=self;
NSMutableArray* annotations=[[NSMutableArray alloc] init];
MyAnnotation* myAnnotation;
for (int i = 0; i<[DataArr count]; i++)
{
CLLocationCoordinate2D theCoordinate;
double a = [[[DataArr objectAtIndex:i] valueForKey:#"lat"] doubleValue];
double b =[[[DataArr objectAtIndex:i] valueForKey:#"lon"] doubleValue];
theCoordinate.latitude = a;
theCoordinate.longitude =b;
myAnnotation=[[MyAnnotation alloc] init];
NSString *str=[NSString stringWithFormat:#"%d",i];
[myAnnotation indexOfAccessibilityElement:str];
myAnnotation.coordinate=theCoordinate;
myAnnotation.title=[[DataArr objectAtIndex:i] valueForKey:#"name"];
myAnnotation.ID_map=i;
[annotations addObject:myAnnotation];
}
for (int i =0; i<[annotations count]; i++)
{
[mapView addAnnotation:[annotations objectAtIndex:i]];
}
// Walk the list of overlays and annotations and create a MKMapRect that
// bounds all of them and store it into flyTo.
MKMapRect flyTo = MKMapRectNull;
for (id <MKAnnotation> annotation in annotations)
{
NSLog(#"fly to on");
MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);
if (MKMapRectIsNull(flyTo))
{
flyTo = pointRect;
} else
{
flyTo = MKMapRectUnion(flyTo, pointRect);
//NSLog(#"else-%#",annotationPoint.x);
}
}
// Position the map so that all overlays and annotations are visible on screen.
mapView.visibleMapRect = flyTo;
}
#pragma mark MKMapViewDelegate
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
NSLog(#"didSelectAnnotationView");
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
NSLog(#"welcome into the map view annotation");
// if it's the user location, just return nil.
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
// try to dequeue an existing pin view first
static NSString* AnnotationIdentifier = #"AnnotationIdentifier";
MKPinAnnotationView* pinView = [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
pinView.animatesDrop=YES;
pinView.canShowCallout=YES;
pinView.pinColor=MKPinAnnotationColorPurple;
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[rightButton setTitle:annotation.title forState:UIControlStateNormal];
[rightButton addTarget:self
action:#selector(showDetails:)
forControlEvents:UIControlEventTouchUpInside];
pinView.rightCalloutAccessoryView = rightButton;
UIImageView *profileIconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"profile.png"]];
pinView.leftCalloutAccessoryView = profileIconView;
[profileIconView release];
return pinView;
}