iphone - 自定义注释错误

Question

我使用下面的代码在我的地图视图中设置了一个自定义注释。问题是注释图像的位置不正确，它把它放在实际位置的右侧，而不是像使用常规 Pins 时那样准确。

    - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    if ([annotation isKindOfClass:[MKUserLocation class]])
        return nil;
    static NSString* AnnotationIdentifier = @"AnnotationIdentifier";
    MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
    if(annotationView)
        return annotationView;
    else
    {
        MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                         reuseIdentifier:AnnotationIdentifier] autorelease];
        annotationView.canShowCallout = YES;
        annotationView.image = [UIImage imageNamed:[NSString stringWithFormat:@"townhouse.png"]];
        UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        [rightButton addTarget:self action:@selector(writeSomething:) forControlEvents:UIControlEventTouchUpInside];
        [rightButton setTitle:annotation.title forState:UIControlStateNormal];
        annotationView.rightCalloutAccessoryView = rightButton;
        annotationView.canShowCallout = YES;
        annotationView.draggable = YES;
        return annotationView;
    }
    return nil;
}

任何帮助都将不胜感激！

/马库斯

Answer 1

马库斯，

使用centerOffsetMKAnnotationView 的属性来移动您的自定义注释视图。

annotationView.centerOffset = CGPointMake(xOffset, yOffest);