Mapview not displaying Title or subtitle from pin

App returns error when clicking the annotation pin. However it does not crash. It just does not show the title or subtitle.

Error is (lldb) then list a string of numbers like 0x3516b5a0.

plist example:

<dict>
        <key>cellName</key>
        <string>Abingdon Lodge No. 48</string>
        <key>cellSubtitle</key>
        <string>Abingdon, VA</string>
        <key>address</key>
        <string>325 W Main Street Abingdon, Virginia 24210</string>
        <key>latitude</key>
        <real>36.708649</real>
        <key>longitude</key>
        <real>-81.981184</real>
        <key>webSite</key>
        <string>http://www.grandlodgeofvirginia.org/lodges/48/</string>
        <key>statedCom</key>
        <string>Abingdon Lodge No. 48 holds it&apos;s stated communication on the 2nd Monday of the month at 7:30 PM. If there are any exceptions to the regular meeting day or time, they are posted on the Lodge website.</string>
        <key>history</key>
        <string>According to the earliest records the Abingdon Lodge had its origin “At a meeting held at the house of James White in the town.</string>
    </dict>

MapviewController.M

- (void)viewDidLoad
{

    // Do any additional setup after loading the view, typiclly from a nib.
    //Create the region
    MKCoordinateRegion myRegion;

    //Center
    CLLocationCoordinate2D center;
    center.latitude = VA_LATITUDE;
    center.longitude = VA_LONGITUDE;

    //Span
    MKCoordinateSpan span;
    span.latitudeDelta = THE_SPAN;
    span.longitudeDelta = THE_SPAN;

    myRegion.center = center;
    myRegion.span = span;


    //Set our mapView
    [myMapView setRegion:myRegion animated:YES];


    NSString *path = [[NSBundle mainBundle] pathForResource:@"lodges" ofType:@"plist"];
    NSMutableArray* lodgelist = [[NSMutableArray alloc] initWithContentsOfFile:path];

    for(int i = 0; i < [lodgelist count]; i++) {
        float realLatitude = [[[lodgelist objectAtIndex:i] objectForKey:@"latitude"] floatValue];
        float realLongitude = [[[lodgelist objectAtIndex:i] objectForKey:@"longitude"] floatValue];

        CLLocationCoordinate2D mypoint;
        mypoint.latitude = realLatitude;
        mypoint.longitude = realLongitude;
        Annotation *lodgepoint =[Annotation alloc];
        lodgepoint.coordinate = mypoint;
        lodgepoint.title = [[lodgelist objectAtIndex:i] objectForKey:@"cellName"];
        lodgepoint.subtitle = [[lodgelist objectAtIndex:i] objectForKey:@"cellSubtitle"];
        [self.myMapView addAnnotation:lodgepoint];


    }



}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

MapViewController.h

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

@interface AWCMapViewController : UIViewController

@property (strong, nonatomic) IBOutlet MKMapView *myMapView;

-(IBAction)findmylocation:(id)sender;
-(IBAction)setmaptype:(id)sender;

@property (strong, nonatomic) NSArray *tabledata;


@end

回答1:

In your

-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation

add the following under your MKAnnottionView

customPinView.canShowCallout=YES;

Regards

回答2:

@interface Annotation : NSObject <MKAnnotation>

@property(nonatomic, assign) CLLocationCoordinate2D coordinate;
@property(nonatomic, copy) NSString *title;
@property(nonatomic, copy) NSString *subtitle;

I had to change the title from assign to copy. :P