need to drop pin at two places... current location and events locations - iphone

Question

I need help on this .... drop the pins.
current location.... pin drop.... with blue....
Event location :locations latitude:53.373812...longitude 4.890951 with red pin.
I did like this:
#interface AddressAnnotation : NSObject<MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString *mTitle;
NSString *mSubTitle;
// CLLocationManager *locationManager;
// CLLocation *currentLocation;
}
#end
#interface MapViewController : UIViewController <CLLocationManagerDelegate> {
IBOutlet MKMapView *mapView;
AddressAnnotation *addAnnotation;
NSString *address;
CLLocationManager *locationManager;
CLLocation *currentLocation;
}
+(MapViewController *)sharedInstance;
-(void)start;
-(void)stop;
-(BOOL)locationKnown;
#property(nonatomic,retain)CLLocation *currentLocation;
#property(nonatomic,retain)NSString *address;
-(CLLocationCoordinate2D) addressLocation;
-(void)showAddress;
#end
//Implementation file.
#import "MapViewController.h"
#implementation AddressAnnotation
#synthesize coordinate;
//#synthesize currentLocation;
- (NSString *)subtitle{
//return #"Sub Title";
return #"Event";
}
- (NSString *)title{
//return #"Title";
return #"Location ";
}
-(id)initWithCoordinate:(CLLocationCoordinate2D) c{
coordinate=c;
//NSLog(#"%f,%f",c.latitude,c.longitude);
return self;
}
#end
#implementation MapViewController
#synthesize address;
#synthesize currentLocation;
static MapViewController *sharedInstance;
+(MapViewController *)sharedInstance{
#synchronized (self)
{
if (!sharedInstance)
[[MapViewController alloc]init];
}
return sharedInstance;
}
+(id)alloc{
#synchronized(self){
NSAssert(sharedInstance==nil,"Attempted to allocate a second instance of a singleton LocationController.");
sharedInstance = [super alloc];
}
return sharedInstance;
}
-(id)init{
if(self==[super init]){
self.currentLocation=[[CLLocation alloc]init];
locationManager=[[CLLocationManager alloc]init];
locationManager.delegate=self;
[self start];
}
return self;
}
-(void)start{
NSLog(#"Start");
[locationManager startUpdatingLocation];
}
-(void)stop{
[locationManager stopUpdatingLocation];
}
-(BOOL)locationKnown{
if (round(currentLocation.speed)==-1)
return NO;
else return YES;
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
if (abs([newLocation.timestamp timeIntervalSinceDate:[NSDate date]])<120){
self.currentLocation=newLocation;
}
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
UIAlertView *alert;
alert=[[UIAlertView alloc]initWithTitle:#"Error" message:[error description] delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
self.title=#"Map-View";
[self addressLocation];
[self showAddress];
NSLog(#"address is %#",address);
}
-(void)showAddress{
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta=0.2;
span.longitudeDelta=0.2;
CLLocationCoordinate2D location = [self addressLocation];
region.span=span;
region.center=location;
if(addAnnotation != nil) {
[mapView removeAnnotation:addAnnotation];
[addAnnotation release];
addAnnotation = nil;
}
addAnnotation = [[AddressAnnotation alloc] initWithCoordinate:location];
[mapView addAnnotation:addAnnotation];
[mapView setRegion:region animated:TRUE];
[mapView regionThatFits:region];
}
-(CLLocationCoordinate2D) addressLocation {
NSString *urlString = [NSString stringWithFormat:#"http://maps.google.com/maps/geo?q=%#&output=csv",
[address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSString *locationString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString]];
NSArray *listItems = [locationString componentsSeparatedByString:#","];
double latitude = 0.0;
double longitude = 0.0;
if([listItems count] >= 4 && [[listItems objectAtIndex:0] isEqualToString:#"200"]) {
latitude = [[listItems objectAtIndex:2] doubleValue];
longitude = [[listItems objectAtIndex:3] doubleValue];
}
else {
//Show error
}
CLLocationCoordinate2D location;
location.latitude = latitude;
location.longitude = longitude;
return location;
}
- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation{
MKPinAnnotationView *annView=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"currentloc"];
annView.pinColor = MKPinAnnotationColorRed;
annView.animatesDrop=YES;
annView.canShowCallout = YES;
annView.calloutOffset = CGPointMake(-5, 5);
return annView;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Overriden to allow any orientation.
return YES;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[address release];
[super dealloc];
}
#end
Please help me out...
thanks in adavance.

Answer 1

Showing user current location is simple.
-(void)start{
NSLog(#"Start");
mapView.showsUserLocation=YES; //This will show the current location as blue dot in your mapview
[locationManager startUpdatingLocation];
}
-(void)stop{
mapView.showsUserLocation=NO;
[locationManager stopUpdatingLocation];
}
In your viewForAnnotation Delegate
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
if (annotation == mapView.userLocation)
{
// This code will execute when the current location is called.
return nil;
}
else
{
MKPinAnnotationView *annView=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"currentloc"];
annView.pinColor = MKPinAnnotationColorRed;
annView.animatesDrop=YES;
annView.canShowCallout = YES;
annView.calloutOffset = CGPointMake(-5, 5);
return annView;
}