MapView 注释未显示图像和详细信息披露按钮 - iOS Mapkit Xcode 6 Objective C

Question

我在 mapview 中添加了 2 个注释，其中 leftcalloutaccessoryview（带有图像）和 rightcalloutacessoryview（带有详细信息披露按钮）。问题是它工作正常，但仅适用于一个注释，而不适用于两者。它显示一个带有图像和细节披露按钮的注释，可以点击，而第二个注释只显示标题，没有图像，没有细节披露按钮，不能点击。这是我的代码。

-(void)viewDidLoad{

 [super viewDidLoad];

 myLocationManager=[[CLLocationManager alloc] init];
 geocoder = [[CLGeocoder alloc] init];

myLocationManager.delegate=self;
myLocationManager.desiredAccuracy=kCLLocationAccuracyNearestTenMeters;
myLocationManager.distanceFilter=10.0;
[myLocationManager startUpdatingLocation];    

mapView = [[MKMapView alloc]initWithFrame:
           CGRectMake(10, 255, 300, 205)];
mapView.delegate = self;    
mapView.centerCoordinate = CLLocationCoordinate2DMake(37.32, -122.03);    
mapView.mapType = MKMapTypeStandard; 

[self startAddingAnnottaions];

[self.view addSubview:mapView];
}

//现在开始添加注释

-(void)startAddingAnnottaions{

//first annotation
CLLocationCoordinate2D location;
location.latitude = (double) 37.331768;
location.longitude = (double) -122.020039;
MapAnnotation *newAnnotation = [[MapAnnotation alloc]
                                initWithTitle:@"Apple Head quaters" subtitle:@"subtitle" andCoordinate:location];
[mapView addAnnotation:newAnnotation];

//second annotation
CLLocationCoordinate2D location2;
location2.latitude = (double) 37.35239;
location2.longitude = (double) -122.025919;
MapAnnotation *newAnnotation2 = [[MapAnnotation alloc]
                                 initWithTitle:@"Test Annotation" subtitle:@"parse"  andCoordinate:location2];
[mapView addAnnotation:newAnnotation2];
}

//didAddAnnotationViews

- (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views
{
 MKAnnotationView *annotationView = [views objectAtIndex:0];
 id <MKAnnotation> mapPoint = [annotationView annotation];

annotationView.canShowCallout = YES;
annotationView.calloutOffset = CGPointMake(0, 32);

UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
annotationView.rightCalloutAccessoryView = rightButton;

UIImageView *iconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"orageSquare.png"]];
annotationView.leftCalloutAccessoryView = iconView;

MKCoordinateRegion region; 
region.center = [mapPoint coordinate];  
 MKCoordinateSpan span; 
 span.latitudeDelta = 0.0144927536;  //  0.0144927536 is equivalent to 1 mile
 span.longitudeDelta = 0.0144927536;  
 region.span = span; 

 [mv setRegion:region animated:YES];
 [mv selectAnnotation:mapPoint animated:YES]; 

}

//callout Accessory Control Tapped

-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
id <MKAnnotation> annotation = [view annotation];

NSLog(@"Right Button Pressed");
[self performSegueWithIdentifier:@"mapToOtherInfo" sender:self];
}

我做错了什么？它应该显示带有图像和详细信息披露按钮的多个注释。为什么它只显示一个注释？有时第一个可以正常工作，有时第二个可以，但两者不能一起正常工作。

Answer 1

您应该在viewForAnnotation 方法中设置leftCalloutAccessoryView 和rightCalloutAccessoryView 属性，而不是didAddAnnotationViews。然后你可以显示这两个注释。

示例：

- (MKAnnotationView *)mapView:(MKMapView*)mapView
        viewForAnnotation:(id <MKAnnotation>)annotation
{
    if (annotation == mapView.userLocation) {
        return nil;
    }

    MKPinAnnotationView *annotationView;
    NSString *identifier = @"Pin";
    annotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
    if (nil == annotationView) {
        annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
    }

    UIImageView *iconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"frame_blue.png"]];
    annotationView.leftCalloutAccessoryView = iconView;

    annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

    return annotaionView;
}