Question

我试图通过覆盖以下内容来改变MKMapView上注释引脚的颜色：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
// If it's the user location, just return nil.
if ([annotation isKindOfClass:[MKUserLocation class]])
    return nil;

// Handle any custom annotations.
if ([annotation isKindOfClass:[MKPointAnnotation class]])
{
    MKPinAnnotationView *pinView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:@"CustomPinAnnotationView"];
    if (!pinView)
    {
        pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"CustomPinAnnotationView"];
        pinView.canShowCallout = YES;
        pinView.pinColor = MKPinAnnotationColorGreen;
    } else {
        pinView.annotation = annotation;
    }
    return pinView;
}
return nil;
}

以下是相关方法：

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

[self configureView];
}


- (void)configureView
{
// Update the user interface for the detail item.
if (self.detailItem) {

    // display map ????
    PFGeoPoint *geoPoint = self.detailItem[@"location"];
    CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(geoPoint.latitude,geoPoint.longitude);

    MKPointAnnotation *annotation =[[MKPointAnnotation alloc] init];
    annotation.coordinate = coordinate;

    // remove previous annotation pin
    if([self.mapView.annotations count] == 1) {
        [self.mapView removeAnnotation:[self.mapView.annotations objectAtIndex:0]];
    }

    [self.mapView addAnnotation:annotation];
    annotation.title = self.detailItem[@"text"];

    MKCoordinateSpan span = {.latitudeDelta =  0.05, .longitudeDelta =  0.05};
    MKCoordinateRegion region = {coordinate, span};
    [self.mapView setRegion:region];

    [self.mapView setCenterCoordinate:self.mapView.region.center animated:NO];

}

}

我的问题是针注释颜色仍然显示红色默认不是绿色，因为我想要。我在这里缺少什么？

Answer 1

归功于@Anna，将下面的行添加到 - （void）configureView

self.mapView.delegate = self;

在MKMapView上更改注释引脚颜色

1 个答案: