Passing data using calloutAccessoryControlTapped Xcode - ios

Question

I am developing an app in Xcode (objective-c). My app has a TableView with a list of restaurants and when you press one row, another view is opened with the restaurant information. The method I am using is that I am sending the title in the row to the new view and depending on the title I load the information of the restaurant. I want to do exactly the same using a map pin button. My problem is that I am trying to send the TitleLabel to other ViewController but this is not working and I don't know why.
This is my map pin: RestMapPin.h:
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
#interface RestMapPin : NSObject <MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString *title;
NSString *subtitle;
}
#property (nonatomic, assign) CLLocationCoordinate2D coordinate;
#property (nonatomic, copy) NSString *title;
#property (nonatomic, copy) NSString *subtitle;
#end
This is my RestMappin.m:
#import "RestMapPin.h"
#implementation RestMapPin
#synthesize coordinate, title, subtitle;
#end
This is my MapViewController.h:
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface MapViewController : UIViewController {
MKMapView *mapView;
}
#property (weak, nonatomic) IBOutlet UIBarButtonItem *barButton;
#property (nonatomic, retain) IBOutlet MKMapView *mapView;
-(IBAction)setMap:(id)sender;
#end
This is my MapViewController.m:
#import "MapViewController.h"
#import "SWRevealViewController.h"
#import "RestMapPin.h"
#import "RestViewController.h"
#import "MainTableViewController.h"
#interface MapViewController ()
#end
#implementation MapViewController
#synthesize mapView;
- (void)viewDidLoad {
[super viewDidLoad];
_barButton.target = self.revealViewController;
_barButton.action = #selector(revealToggle:);
[self.view addGestureRecognizer:self.revealViewController.panGestureRecognizer];
mapView.delegate = self;
/*Babelia*/
MKCoordinateRegion region_Babelia = { {0.0, 0.0}, {0.0, 0.0}};
region_Babelia.center.latitude = 40.4234778;
region_Babelia.center.longitude = -3.686283000000003;
region_Babelia.span.longitudeDelta = 0.1f;
region_Babelia.span.latitudeDelta = 0.1f;
[mapView setRegion:region_Babelia animated:YES];
RestMapPin *ann_Babelia = [[RestMapPin alloc] init];
ann_Babelia.title = #"Babelia";
ann_Babelia.subtitle = #"Barrio de Salamanca";
ann_Babelia.coordinate = region_Babelia.center;
[mapView addAnnotation:ann_Babelia];
/*Bacira*/
MKCoordinateRegion region_Bacira = { {0.0, 0.0}, {0.0, 0.0}};
region_Bacira.center.latitude = 40.43375390000001;
region_Bacira.center.longitude = -3.699036299999989;
region_Bacira.span.longitudeDelta = 0.1f;
region_Bacira.span.latitudeDelta = 0.1f;
[mapView setRegion:region_Bacira animated:YES];
RestMapPin *ann_Bacira = [[RestMapPin alloc] init];
ann_Bacira.title = #"Bacira";
ann_Bacira.subtitle = #"Chamberí";
ann_Bacira.coordinate = region_Bacira.center;
[mapView addAnnotation:ann_Bacira];
/*Indicador de posicion del mapa (para centrarlo)*/
MKCoordinateRegion region_posicion = { {0.0, 0.0}, {0.0, 0.0}};
region_posicion.center.latitude = 40.44934744420573;
region_posicion.center.longitude = -3.695504665374756;
region_posicion.span.longitudeDelta = 0.08f;
region_posicion.span.latitudeDelta = 0.08f;
[mapView setRegion:region_posicion animated:YES];
/*************************************************/
}
-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *pinView = nil;
if(annotation != mapView.userLocation) {
static NSString *defaultPinID = #"com.invasivecode.pin";
pinView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil )
pinView = [[MKAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:defaultPinID];
pinView.canShowCallout = YES;
pinView.image = [UIImage imageNamed:#"pin2#2x.png"];
}
else {
//[mapView.userLocation setTitle:#"I am here"];
}
UIButton *pinButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
//if ([[annotation title] isEqualToString:#"Marieta"]) {
//[pinButton addTarget:self action:#selector(annotationView:) forControlEvents:UIControlEventTouchUpInside];
//}
pinView.rightCalloutAccessoryView = pinButton;
return pinView;
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
RestMapPin *selectedAnnotation = view.annotation;
NSLog(#"Title of selected pin - %#", selectedAnnotation.title);
// Here you get the title of selected annotation
//RestViewController *objYourVC = [[RestViewController alloc]init];
RestViewController *objYourVC = [self.storyboard instantiateViewControllerWithIdentifier:#"MyIdentifier"];
objYourVC.TitleLabel = selectedAnnotation. title;
NSLog(#"objYourVC.TitleLabel - %#", objYourVC.TitleLabel);
//objYourVC.DetailModal.title = selectedAnnotation.title;
//NSLog(#"objYourVC.TitleLabel - %#", objYourVC.TitleLabel);
objYourVC.DescriptionLabel = selectedAnnotation. subtitle;
NSLog(#"objYourVC.DescriptionLabel - %#", objYourVC.DescriptionLabel);
[self.navigationController pushViewController:objYourVC animated:YES];
}
-(IBAction)setMap:(id)sender {
switch (((UISegmentedControl *) sender).selectedSegmentIndex) {
case 0:
mapView.mapType = MKMapTypeStandard;
break;
case 1:
mapView.mapType = MKMapTypeSatellite;
break;
case 2:
mapView.mapType = MKMapTypeHybrid;
break;
default:
break;
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Then I am going to show you the view that where I want to get the data of the objYourVC.TitleLabel
This is my RestViewController.h:
#import <UIKit/UIKit.h>
#import "Restaurant.h"
#interface RestViewController : UIViewController
#property (strong, nonatomic) IBOutlet UILabel *TitleLabel;
#property (strong, nonatomic) IBOutlet UILabel *DescriptionLabel;
#property (strong, nonatomic) IBOutlet UIImageView *ImageView;
//#property (strong, nonatomic) IBOutlet NSArray *DetailModal;
#property (weak, nonatomic) IBOutlet UITextView *phoneTextView;
#property (weak, nonatomic) IBOutlet UIButton *webButton;
#property (weak, nonatomic) IBOutlet UITextView *adressTextView;
#property (weak, nonatomic) IBOutlet UIButton *cartaButton;
#property (weak, nonatomic) IBOutlet UITextView *reviewTextView;
#property (weak, nonatomic) IBOutlet UILabel *updateLabel;
#property (nonatomic, strong) Restaurant *DetailModal;
#end
This is my RestViewController.m:
#import "RestViewController.h"
#import <QuartzCore/QuartzCore.h>
#interface RestViewController ()
#end
#implementation RestViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSString *decDate = #"11/2016";
if ([_DetailModal.title isEqualToString:#"Babelia"]) {
_TitleLabel.text = _DetailModal.title;
_DescriptionLabel.text = _DetailModal.desc;
_ImageView.image = [UIImage imageNamed:_DetailModal.image];
_phoneTextView.text = #"([phone]";
_adressTextView.text = #"\n• Callejón de Puigcerdá, 6, Madrid, España";
[_webButton setTitle:#"Web" forState:UIControlStateNormal];
[_webButton addTarget:self action:#selector(openWeb_babelia_Url) forControlEvents:UIControlEventTouchUpInside];
[_cartaButton setTitle:NSLocalizedString (#"Menu", nil) forState:UIControlStateNormal];
[_cartaButton addTarget:self action:#selector(openCarta_babelia) forControlEvents:UIControlEventTouchUpInside];
_reviewTextView.text = NSLocalizedString(#"No reviews available.", nil);
_updateLabel.text = [NSString stringWithFormat:NSLocalizedString(#"Updated: %#", nil), decDate];
}
if ([_DetailModal.title isEqualToString:#"Bacira"]) {
_TitleLabel.text = _DetailModal.title;
_DescriptionLabel.text = _DetailModal.desc;
_ImageView.image = [UIImage imageNamed:_DetailModal.image];
_phoneTextView.text = #"([phone]";
_adressTextView.text = #"\n• Calle Del Castillo, 16, Madrid, España";
[_webButton setTitle:#"Web" forState:UIControlStateNormal];
[_webButton addTarget:self action:#selector(openWeb_bacira_Url) forControlEvents:UIControlEventTouchUpInside];
[_cartaButton setTitle:NSLocalizedString (#"Menu", nil) forState:UIControlStateNormal];
[_cartaButton addTarget:self action:#selector(openCarta_bacira) forControlEvents:UIControlEventTouchUpInside];
_reviewTextView.text = NSLocalizedString(#"No reviews available.", nil);
_updateLabel.text = [NSString stringWithFormat:NSLocalizedString(#"Updated: %#", nil), decDate];
}
}
-(void)openWeb_babelia_Url{
UIApplication *application = [UIApplication sharedApplication];
NSURL *URL = [NSURL URLWithString:#"http://babeliarestaurante.com/contactar/"];
[application openURL:URL options:#{} completionHandler:^(BOOL success) {
if (success) {
NSLog(#"Opened url");
}
}];
}
-(void)openWeb_bacira_Url{
UIApplication *application = [UIApplication sharedApplication];
NSURL *URL = [NSURL URLWithString:#"http://www.bacira.es/contacto/4585843222"];
[application openURL:URL options:#{} completionHandler:^(BOOL success) {
if (success) {
NSLog(#"Opened url");
}
}];
}
-(void)openCarta_babelia{
UIApplication *application = [UIApplication sharedApplication];
NSURL *URL = [NSURL URLWithString:#"http://babeliarestaurante.com/nuestra-cocina/las-cartas/"];
[application openURL:URL options:#{} completionHandler:^(BOOL success) {
if (success) {
NSLog(#"Opened url");
}
}];
}
-(void)openCarta_bacira{
UIApplication *application = [UIApplication sharedApplication];
NSURL *URL = [NSURL URLWithString:#"http://www.bacira.es/carta/4591994095"];
[application openURL:URL options:#{} completionHandler:^(BOOL success) {
if (success) {
NSLog(#"Opened url");
}
}];
}
#end
The problem is that the method calloutAccessoryControlTapped: is not working well because the RestViewController.m is not receiving the objYourVC.TitleLabel. What can I do?
When I run the project, the objYourVC.TitleLabel is good in the MapViewController.m (#"Bacira" for example), but when the project goes to RestViewContoller.m the TitleLable is not good, it shows (#"Label").
I know I have a low level of Xcode and I need your help. I am trying to learn more every day. Can anyone help me? Thank you very much.
Edit: This is my Restaurant.h:
#import <Foundation/Foundation.h>
#interface Restaurant : NSObject
#property (nonatomic, copy) NSString *title;
#property (nonatomic, copy) NSString *desc;
#property (nonatomic, copy) NSString *image;
- (instancetype)init:(NSString *)title descripiton:(NSString *)description image:(NSString *)image;
#end
And this is my restaurant.m:
#import "Restaurant.h"
#implementation Restaurant
- (instancetype)init:(NSString *)title descripiton:(NSString *)description image:(NSString *)image {
self = [super init];
if (self != nil) {
self.title = title;
self.desc = description;
self.image = image;
}
return self;
}
#end

Answer 1

You cannot directly deal with IBoutlet , because they have weak reference. o you need to store it an varaible and then in viewDidLoad you need to update the appropriate IBOutlets.
MapViewController.m
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
RestMapPin *selectedAnnotation = view.annotation;
NSLog(#"Title of selected pin - %#", selectedAnnotation.title);
// Here you get the title of selected annotation
//RestViewController *objYourVC = [[RestViewController alloc]init];
RestViewController *objYourVC = [self.storyboard instantiateViewControllerWithIdentifier:#"MyIdentifier"];
objYourVC.DetailModal.pagetitle= selectedAnnotation.title;
objYourVC.DetailModal.pageDescription = selectedAnnotation.desc;
[self.navigationController pushViewController:objYourVC animated:YES];
}
RestViewController.h:
#import <UIKit/UIKit.h>
#import "Restaurant.h"
#interface RestViewController : UIViewController
#property (nonatomic, strong) NSString *pageTitle;
#property (nonatomic, strong) NSString *pageDescription ;
#end
RestViewController.m:
#import "RestViewController.h"
#import <QuartzCore/QuartzCore.h>
#interface RestViewController ()
#end
#implementation RestViewController
- (void)viewDidLoad {
[super viewDidLoad];
_TitleLabel.text = _pageTitle;
_DescriptionLabel.text = _pageDescription;
}
#end