How to change title for annotation in ViewDidLoad? - objective-c

Question

I have code for mkannotation but I don't know how to change title in ViewDidLoad.
This is my code:
LocationView.h
...
#interface AddressAnnotation : NSObject<MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString *mTitle;
NSString *mSubTitle;
}
#end
#interface LocationView : UIViewController<MKMapViewDelegate> {
IBOutlet MKMapView *mapView;
AddressAnnotation *addAnnotation;
}
#property (nonatomic, retain) Offers *offer;
#property (retain, nonatomic) IBOutlet MKMapView *mapView;
-(CLLocationCoordinate2D) addressLocation;
#end
LocationView.m
#import "LocationView.h"
#implementation AddressAnnotation
#synthesize coordinate;
- (NSString *)subtitle{
return #"Sub Title";
}
- (NSString *)title{
return #"Title";
}
-(id)initWithCoordinate:(CLLocationCoordinate2D) c{
coordinate=c;
//NSLog(#"%f,%f",c.latitude,c.longitude);
return self;
}
#end
#interface LocationView ()
#end
#implementation LocationView
#synthesize mapView, offer;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// I want in this method to change title
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 = nil;
}
addAnnotation = [[AddressAnnotation alloc] initWithCoordinate:location];
[mapView addAnnotation:addAnnotation];
[mapView setRegion:region animated:TRUE];
[mapView regionThatFits:region];
//[mapView selectAnnotation:mLodgeAnnotation animated:YES];
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
//:(MKMapView *)mapView
-(CLLocationCoordinate2D) addressLocation {
double latitude = 0.0;
double longitude = 0.0;
if(offer.lat > 0 && offer.lon > 0) {
latitude = [offer.lat doubleValue];
longitude = [offer.lon doubleValue];
}
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 = MKPinAnnotationColorGreen;
annView.animatesDrop=TRUE;
annView.canShowCallout = YES;
annView.calloutOffset = CGPointMake(-5, 5);
return annView;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end

Answer 1

Why dont you simply synthesize the properties of your AddressAnnotation class and use something like
addAnnotation.mTitle = yourNewString;
Do I get your question wrong? This seems to be too obvious by far.
Edit
Of course, you have to give this back. For example like this:
- (NSString *)title{ return mTitle;}