SIGABRT error implementing MKAnnotation protocol - ios

Question

I've been trying to do a simple app using MKMapView, and I'm getting hit with a SIGABRT error upon trying to call the <MKAnnotation> class.
The DetailViewController.m file:
#import "WVTDetailViewController.h"
#import <MapKit/MapKit.h>
#import <AddressBook/AddressBook.h>
#import "Pin.h"
#interface WVTDetailViewController ()
{
CLLocationCoordinate2D location;
NSMutableDictionary *masterDict;
NSDictionary *googleDict;
NSDictionary *yahooDict;
NSDictionary *appleDict;
NSDictionary *microsoftDict;
NSDictionary *facebookDict;
}
- (void)configureView;
#end
#implementation WVTDetailViewController
#synthesize address = _address;
- (void)configureView
{
// Update the user interface for the detail item.
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self configureView];
[_mapView setShowsUserLocation:YES];
CLLocationCoordinate2D googleLocation;
googleLocation.latitude = 37.4221;
googleLocation.longitude = -122.0844;
// Yahoo:
CLLocationCoordinate2D yahooLocation;
yahooLocation.latitude = 37.417354;
yahooLocation.longitude = -122.025189;
// Apple:
CLLocationCoordinate2D appleLocation;
appleLocation.latitude = 37.332313;
appleLocation.longitude = -122.030746;
// Microsoft:
CLLocationCoordinate2D microsoftLocation;
microsoftLocation.latitude = 47.639764;
microsoftLocation.longitude = -122.128435;
// Facebook:
CLLocationCoordinate2D facebookLocation;
facebookLocation.latitude = 37.483489;
facebookLocation.longitude = -122.149542;
if ([_address isEqualToString:#"Google"])
{
location = googleLocation;
}
if ([_address isEqualToString:#"Yahoo"])
{
location = yahooLocation;
}
if ([_address isEqualToString:#"Apple"])
{
location = appleLocation;
}
if ([_address isEqualToString:#"Microsoft"])
{
location = microsoftLocation;
}
if ([_address isEqualToString:#"Facebook"])
{
location = facebookLocation;
}
googleDict = #{(NSString *)kABPersonAddressStreetKey: #"1600 Amphitheatre Pkwy",
(NSString *)kABPersonAddressCityKey: #"Mountain View",
(NSString *)kABPersonAddressStateKey: #"CA",
(NSString *)kABPersonAddressZIPKey: #"94043"
};
yahooDict = #{(NSString *)kABPersonAddressStreetKey: #"701 1st Ave",
(NSString *)kABPersonAddressCityKey: #"Sunnyvale",
(NSString *)kABPersonAddressStateKey: #"CA",
(NSString *)kABPersonAddressZIPKey: #"94089"
};
appleDict = #{(NSString *)kABPersonAddressStreetKey: #"1 Infinite Loop",
(NSString *)kABPersonAddressCityKey: #"Cupertino",
(NSString *)kABPersonAddressStateKey: #"CA",
(NSString *)kABPersonAddressZIPKey: #"95014"
};
microsoftDict = #{(NSString *)kABPersonAddressStreetKey: #"One Microsoft Way",
(NSString *)kABPersonAddressCityKey: #"Redmond",
(NSString *)kABPersonAddressStateKey: #"WA",
(NSString *)kABPersonAddressZIPKey: #"98052"
};
facebookDict = #{(NSString *)kABPersonAddressStreetKey: #"1 Hacker Way",
(NSString *)kABPersonAddressCityKey: #"Menlo Park",
(NSString *)kABPersonAddressStateKey: #"CA",
(NSString *)kABPersonAddressZIPKey: #"94025"
};
masterDict = [[NSMutableDictionary alloc] init];
[masterDict setObject: googleDict forKey: #"Google"];
[masterDict setObject: yahooDict forKey: #"Yahoo"];
[masterDict setObject: appleDict forKey: #"Apple"];
[masterDict setObject: microsoftDict forKey: #"Microsoft"];
[masterDict setObject: facebookDict forKey: #"Facebook"];
}
- (void)viewWillAppear:(BOOL)animated
{
// Establish a 1.5km "square" around the 2D coordinate "location" and display it
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(location, 1500, 1500);
[_mapView setRegion:viewRegion animated:YES];
Pin *myLocationPin = [[Pin alloc] initWithNameAndCoords: _address coords: location];
myLocationPin.addr = [masterDict objectForKey:_address];
[_mapView addAnnotation: myLocationPin];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
and the Pin.m file (the one implementing <MKAnnoation>):
#import "Pin.h"
#import <AddressBook/AddressBook.h>
#implementation Pin
- (id) initWithNameAndCoords: (NSString *) name coords: (CLLocationCoordinate2D) coords
{
if (self = [super init])
{
_name = name;
_coords = coords;
}
return self;
}
- (NSString *)title
{
return _name;
}
- (MKMapItem*) returnMapItem
{
MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:[[MKPlacemark alloc] initWithCoordinate:_coords addressDictionary: _addr]];
mapItem.name = _name;
return mapItem;
}
#end
First off, the SIGABRT error is situated at the [_mapView addAnnotation: myLocationPin]; line. I'm also getting a warning in Pin.m saying that Auto property synthesis will not synthesize property declared in a protocol. I used the #synthesize directive to force synthesis.
I've looked through the debugger output, though, and that doesn't seem to be an issue - the synthesized properties are receiving values as they should be.

Answer 1

You should add this to getter function in Pin.m
-(CLLocationCoordinate2D)coordinate { return _coord; }