Question

我一直试图将三个数据点从MKMapView引脚传递到我的下一个视图控制器。

我现在可以使用calloutAccessoryControlTapped传递标题和副标题，但是很难通过第三个参数传递。

我一直在尝试关注这个问题How to extend MKPointAnnotation and add a property to it

我目前的代码是......

在我的第一个ViewController .m文件中

#import "MapAnnotation.h"

- (void)loadMapPins {
  for (int i=0; i<_feedItems1.count; i++){
    Location *item = _feedItems1[i];
    CLLocationCoordinate2D myCoordinate = {[item.latitude doubleValue], [item.longitude doubleValue]};
    MapAnnotation *point = [[MapAnnotation alloc] init];
    point.coordinate = myCoordinate;
    point.title = item.firstname;
    point.subtitle = [NSString stringWithFormat: @"%@", item.time];
    point.dealLink = item.username;
    [self.mapView addAnnotation:point];
  }
}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id )annotation {
  if (annotation == self.mapView.userLocation) return nil;
  static NSString* AnnotationIdentifier = @"AnnotationIdentifier";
  MKPinAnnotationView* customPin = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier];
  customPin.pinColor = MKPinAnnotationColorRed;
  customPin.animatesDrop = YES;
  customPin.canShowCallout = YES;
  UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
  customPin.rightCalloutAccessoryView = rightButton;
  return customPin;
}

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
  NSLog(@"title = %@", view.annotation.title);
  NSLog(@"subtitle = %@", view.annotation.subtitle);
  NSLog(@"title = %@", view.annotation.dealLink);
}

我已根据上述问题创建了其他文件......

MapAnnotation.h

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>

@interface MapAnnotation : MKPointAnnotation
{
NSString *title;
NSString *subtitle;
NSString *dealLink;
CLLocationCoordinate2D coordinate;
}

@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSString *subtitle;
@property (nonatomic, retain) NSString *dealLink;
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

- (id)initWithTitle:(NSString *)ttl subTitle:(NSString *)subttl dealLink:(NSString *)dealLnk andCoordinate:(CLLocationCoordinate2D)c2d;

@end

和MapAnnotation.m

#import "MapAnnotation.h"

@implementation MapAnnotation

@synthesize title,subtitle,dealLink,coordinate;

- (id)initWithTitle:(NSString *)ttl subTitle:(NSString *)subttl dealLink:(NSString *)dealLnk andCoordinate:(CLLocationCoordinate2D)c2d {
title = ttl;
subtitle = subttl;
dealLink = dealLnk;
coordinate = c2d;

return self;
}

@end

但是我总是在calloutAccessoryControlTapped方法中得到“在'id'类型的对象上找不到正确的dealLink”。

任何帮助或建议？这让我疯狂，试图让三个参数通过!!!

将第三个属性添加到MKPointAnnotation / calloutAccessoryControlTapped

0 个答案: