我正在Xcode（objective-c）中开发一个应用程序。我的应用程序有一个带有餐厅列表的TableView，当您按一行时，将打开包含餐厅信息的另一视图。我使用的方法是将行中的标题发送到新视图，然后根据标题加载餐厅信息。我想使用地图图钉按钮执行完全相同的操作。我的问题是我正在尝试将TitleLabel发送到其他ViewController，但这不起作用，我也不知道为什么。
这是我的地图图钉：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
这是我的RestMappin.m：
#import "RestMapPin.h"
@implementation RestMapPin
@synthesize coordinate, title, subtitle;
@end
这是我的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
这是我的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:@"[email protected]"];
}
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
然后，我将向您展示我要在何处获取
objYourVC.TitleLabel数据的视图这是我的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
这是我的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 = @"(+34) 918 31 71 79";
_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 = @"(+34) 91 866 40 30";
_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
问题在于方法
calloutAccessoryControlTapped:不能正常工作，因为RestViewController.m没有收到objYourVC.TitleLabel。我能做什么？当我运行项目时，
objYourVC.TitleLabel在MapViewController.m中很好（例如@@“ Bacira”），但是当项目转到RestViewContoller.m时，TitleLable不好，它显示（@“ Label” ）。我知道我的Xcode等级较低，需要您的帮助。我想每天学习更多。谁能帮我？非常感谢你。
编辑：这是我的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
这是我的餐厅。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
最佳答案
您无法直接处理IBoutlet，因为它们的参考文献薄弱。 o您需要将其存储为变量，然后在viewDidLoad中需要更新适当的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
关于ios - 使用calloutAccessoryControlTapped Xcode传递数据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40707791/