在 iPhone MKMapView 中显示用户位置蓝点

Question

我正在 iPhone 应用程序的 MapView 中开发自定义引脚。 这是代码：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id  <MKAnnotation>)annotation
 {
     static NSString *AnnotationViewID = @"annotationViewID";

     MKAnnotationView *annotationView = (MKAnnotationView *)[myMapView  dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];

     if (annotationView == nil)
     {
         annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
     }

    if ([[annotation title] isEqualToString:NSLocalizedString(@"Current Location",@"")])  {

        MKPinAnnotationView *pin = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
        //pin.pinColor = MKPinAnnotationColorRed;
        annotationView = pin;
    }
    else
    {
        NSString *pin = [NSString stringWithFormat:@"pin%i.png",[[annotation imgNumber] intValue]];
        annotationView.image = [UIImage imageNamed:pin];//Canviar la chincheta per numero
        UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        [annotationView setRightCalloutAccessoryView:button];
        annotationView.annotation = annotation;
        annotationView.canShowCallout = YES;

    /********* Imagen a la izquierda en la burbuja *********/
    annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
    // Set up the Left callout
    UIButton *myDetailButton = [UIButton buttonWithType:UIButtonTypeCustom];
    myDetailButton.frame = CGRectMake(0, 0, 23, 23);
    myDetailButton.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
    myDetailButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;

    // Set the image for the button
    //[myDetailButton setImage:[UIImage imageNamed:@"botocorreu.png"] forState:UIControlStateNormal];
    NSString *detailButton = [NSString stringWithFormat:@"%i",[[annotation imgNumber] intValue]];
    [myDetailButton setImage:[UIImage imageNamed:detailButton] forState:UIControlStateNormal];  
    // Set the button as the callout view
    annotationView.leftCalloutAccessoryView = myDetailButton;
    annotationView.canShowCallout = YES;
    }
     return annotationView;
  }

这很好用，但用红色图钉向我显示用户位置。 我检查了 IB 中的“显示用户位置”。 我想使用默认的蓝点，当用户移动时它会自动移动，这不正确吗？ 我怎样才能做到这一点？

多谢。

Answer 1

将其添加到 viewForAnnotation 方法的 top 中：

if ([annotation isKindOfClass:[MKUserLocation class]])
    return nil;

特殊用户位置注释的类型为 MKUserLocation 并在这种情况下返回 nil 告诉地图视图为其绘制默认视图，即蓝点。

您还可以删除这些行，因为不再需要它们：

if ([[annotation title] isEqualToString:NSLocalizedString(@"Current Location",@"")])  {
    MKPinAnnotationView *pin = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
    //pin.pinColor = MKPinAnnotationColorRed;
    annotationView = pin;
}
else