Question

我正在开发一个带注释的基于地图的应用程序。我希望将注释标注中的附件按钮连接到segue到详细视图控制器。

我在故事板中添加了一个新的视图控制器，其中包含来自地图视图的视图控制器的推送segue，其标识为firePit

我的ViewController.m如下 #import“ViewController.h” #import“Annotations.h”

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    locationManager = [[CLLocationManager alloc] init];
    [locationManager startUpdatingLocation];
    _mapView.showsUserLocation = YES;
    _mapView.delegate = self;

    //Setting the Visable Region
    CLLocationCoordinate2D center = CLLocationCoordinate2DMake(45.036179, -87.134691);
    MKCoordinateRegion adjustedRegion = [_mapView             regionThatFits:MKCoordinateRegionMakeWithDistance(center, 2000, 1900)];
    [self.mapView setRegion: adjustedRegion animated:YES];
    //Annotations - Is this the best place?
    CLLocationCoordinate2D firePitCoord = CLLocationCoordinate2DMake( 45.037559, -87.130526);
    Annotations *firePit = [[Annotations alloc] initWithTitle:@"Fire Pit" Location:firePitCoord];
    [self.mapView addAnnotation:firePit];
}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
    static NSString *identifier = @"Fire Pit";
    if ([annotation isKindOfClass:[Annotations class]]) {

        MKPinAnnotationView *annotationView = (MKPinAnnotationView *) [mapView         dequeueReusableAnnotationViewWithIdentifier:identifier];
        if (annotationView == nil) {
            annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
            annotationView.enabled = YES;
            annotationView.canShowCallout = YES;
            annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        } else {
            annotationView.annotation = annotation;
        }

        return annotationView;
    }

    return nil;
}

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{

    [self performSegueWithIdentifier:@"firePit" sender:view]; //thread breakdown 3.1
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(MKAnnotationView *)sender
{
    if ([segue.identifier isEqualToString:@"firePit"])
    {
        MKAnnotationView *annotationView = sender;
        [segue.destinationViewController setAnnotation:annotationView.annotation];
    }
}

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

@end

应用程序在模拟器中起作用，直到我按下注释标注中的附件按钮。然后崩溃并警告我[self performSegueWithIdentifier:@"firePit" sender:view]方法中的线程细分（如代码中所述）。

如果有人能够提供对此问题的深入了解，我将非常感激。我似乎无法从任何其他资源中寻求帮助，但如果您有推荐我会喜欢链接。

谢谢

使用地图注释来调用segue

0 个答案: