從自定義標註跳轉到MKMap中的另一個

我一直在關注此tutorial以顯示自定義標註標註氣泡。如果您只有一個具有自定義註釋視圖的註釋，它可以很好地工作。從自定義標註跳轉到MKMap中的另一個

但是，我需要在我的地圖上顯示更多內容，並且遇到了從自定義註釋視圖切換到另一個問題的麻煩。如果我點擊另一個引腳，當選擇已經有一個並想要出現新的自定義註釋視圖時，它不起作用。我首先要在mapview上隨意點擊其他地方。我想我在DidDelect方法中有一些工作要做，但我不確定...

你會如何解決這樣的問題？

- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view { 
    if (self.calloutAnnotation && [view.annotation isKindOfClass:[MyHomeAnnotation class]]) { 
     [self.mapView removeAnnotation: self.calloutAnnotation]; 
    } 
} 
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view { 
    if ([view.annotation isKindOfClass:[MyHomeAnnotation class]]) { 
     if (self.calloutAnnotation == nil) { 
      self.calloutAnnotation = [[CalloutMapAnnotation alloc] initWithLatitude:view.annotation.coordinate.latitude 
                     andLongitude:view.annotation.coordinate.longitude]; 
     } else { 
      self.calloutAnnotation.latitude = view.annotation.coordinate.latitude; 
      self.calloutAnnotation.longitude = view.annotation.coordinate.longitude; 
     } 
     [self.mapView addAnnotation:self.calloutAnnotation]; 
     self.selectedAnnotationView = view; 
    } 
} 



- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation { 
    if (annotation == self.calloutAnnotation) { 
     CalloutMapAnnotationView *calloutMapAnnotationView = (CalloutMapAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:@"CalloutAnnotation"]; 
     if (!calloutMapAnnotationView) { 
      calloutMapAnnotationView = [[[CalloutMapAnnotationView alloc] initWithAnnotation:annotation 
                      reuseIdentifier:@"CalloutAnnotation"] autorelease]; 
      calloutMapAnnotationView.contentHeight = 78.0f; 
      UIImage *asynchronyLogo = [UIImage imageNamed:@"cykelrød1.png"]; 
      UIImageView *asynchronyLogoView = [[[UIImageView alloc] initWithImage:asynchronyLogo] autorelease]; 
      asynchronyLogoView.frame = CGRectMake(5, 2, asynchronyLogoView.frame.size.width, asynchronyLogoView.frame.size.height); 
      [calloutMapAnnotationView.contentView addSubview:asynchronyLogoView]; 
     } 
     calloutMapAnnotationView.parentAnnotationView = self.selectedAnnotationView; 
     calloutMapAnnotationView.mapView = self.mapView; 
     return calloutMapAnnotationView; 
    } else if ([annotation isKindOfClass:[MyHomeAnnotation class]]) { 
     MKPinAnnotationView *annotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation 
                       reuseIdentifier:@"CustomAnnotation"] autorelease]; 
     annotationView.canShowCallout = NO; 
     annotationView.pinColor = MKPinAnnotationColorGreen; 
     return annotationView; 
    }else if ([annotation isKindOfClass:[MyMapAnnotation class]]) { 
     MKPinAnnotationView *annotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation 
                       reuseIdentifier:@"NormalAnnotation"] autorelease]; 
     annotationView.canShowCallout = YES; 
     annotationView.pinColor = MKPinAnnotationColorPurple; 
     return annotationView; 
    } 


    return nil; 
}

來源

2011-01-11 danskcollignon

我並沒有真正使用MKMap框架，所以我真的無法幫到你....我可以說的是你可以製作MKMapView類的子視圖，並在其他地方模擬一個水龍頭地圖視圖，並將其傳遞給超級視圖？這使得它認爲有一個以前的水龍頭時，實際上沒有...... – 2011-01-11 13:11:46

這聽起來像這是我應該做的，但我不知道如何做到這一點... – danskcollignon 2011-01-11 13:38:29

這裏是我的解決方案，我使用經度和緯度來區分哪些標註應該從mapview中刪除。希望這會有所幫助。

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view { 
    NSLog(@"didSelectAnnotationView:%f", view.annotation.coordinate.latitude); 

    if (self.calloutAnnotation == nil) { 

     CalloutMapAnnotation *tempCallout = [[CalloutMapAnnotation alloc] 
             initWithLatitude:view.annotation.coordinate.latitude    
             andLongitude:view.annotation.coordinate.longitude]; 

     self.calloutAnnotation = tempCallout; 
     [tempCallout release]; 

    } else { 

     //remove callout when callout already exist 
     [self.myMapView removeAnnotation: self.calloutAnnotation]; 
     self.selectedAnnotationView = nil; 

     //reposition 
     self.calloutAnnotation.latitude = view.annotation.coordinate.latitude; 
     self.calloutAnnotation.longitude = view.annotation.coordinate.longitude; 

    } 

    [self.myMapView addAnnotation:self.calloutAnnotation]; 
    self.selectedAnnotationView = view; 
} 

- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view { 

    NSLog(@"didDeselectAnnotationView:%f", view.annotation.coordinate.latitude); 

    //use the latitude and longitude to avoid remove twice 

    if (self.calloutAnnotation && 
    self.selectedAnnotationView.annotation.coordinate.latitude == view.annotation.coordinate.latitude && 
    self.selectedAnnotationView.annotation.coordinate.longitude == view.annotation.coordinate.longitude 
    ) { 

     [self.myMapView removeAnnotation: self.calloutAnnotation]; 
     self.selectedAnnotationView = nil; 
     self.calloutAnnotation.isAddtoMap = NO; 
    } 

}

來源

2011-04-21 10:08:54

從自定義標註跳轉到MKMap中的另一個

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