更新註釋的副標題

我一直在設置MapView中的註釋的副標題，只要點擊它，我們就掙扎着。更新註釋的副標題

.M：

MKCoordinateRegion England = { {0.0, 0.0} , {0.0, 0.0} }; 
England.center.latitude = 51.50063; 
England.center.longitude = -0.124629; 
England.span.longitudeDelta = 100.0f; 
England.span.latitudeDelta = 100.0f; 
[mapView setRegion:England animated:YES]; 

Annotation *ann1 = [[Annotation alloc] init]; 
ann1.title = @"England"; 
ann1.subtitle = @"subtitle"; 
ann1.coordinate = England.center; 
[mapView addAnnotation:ann1]; 


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

MKPinAnnotationView *MyPin = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"]; MyPin.pinColor = MKPinAnnotationColorPurple; 

UIButton *advertButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
[advertButton addTarget:self action:@selector(button:) forControlEvents:UIControlEventTouchUpInside]; 


MyPin.rightCalloutAccessoryView = advertButton; 
MyPin.draggable = NO; 
MyPin.highlighted = YES; 
MyPin.animatesDrop = TRUE; 
MyPin.canShowCallout = YES; 

return MyPin; 


} 

- (void)mapView:(MKMapView *)mapView1 didSelectAnnotationView:(MKAnnotationView *)view 
{ 
id<MKAnnotation> selectedAnn = [mapView.selectedAnnotations objectAtIndex:0]; 
country_title = selectedAnn.title; 

selectedAnn.subtitle = @"NEW SUBTITLE"; 

}

如何設置字幕一旦註釋已經被點擊？我不想這樣做，因爲我點擊時從mysql獲取了一些行..但我不知道如何更新特定註釋的副標題？

在此先感謝！ :)

來源

2013-05-09 Mathias Lund

id<MKAnnotation> selectedAnn = view.annotation; 
[mapview removeAnnotation:selectedAnn]; 

.. Add Annotation with new subtitle 

[mapview addAnnotation:newselectedAnn]; 
[newselectedAnn setSelected:Yes animated:No];

希望這有助於

來源

2013-05-09 08:56:10 Mohith

嗨Mohith！感謝您的快速回復。不幸的是，我很困惑該放哪一行？我已經在我的didSelectAnnotationView：id selectedAnn = [mapView.selectedAnnotations objectAtIndex：0]; ...我很新的這個:( – 2013-05-09 09:06:17

用我的代碼段替換整個內容 – Mohith 2013-05-09 09:07:20

我試過你的片段，但它只能讓我把一個新的註釋放在一個特定的地方，如果它不是我單擊的註釋，那麼該怎麼辦？你不能只設置一個NSString屬性，然後說：id selectedAnn = view.annotation;country_title = selectedAnn.title ; if（[country_title isEqualToString：@「USA」]）{ subtitle_USA = @「NEW SUBTITLE」; } – 2013-05-11 07:05:04

更新註釋的副標題

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