为什么不能在mapView上添加注释?我与注释阵列,然后尝试把它们映射(((地图是空的(这是我的代码,并viewAnnotation方法在那里我找到我自己的注释类错误(为什么不能在mapView上添加注释?
@implimentation MyClass {
NSMutableArray *_annotation;
}
_agents = [[Database sharedDatabase] agentsList];
_mapView.delegate = self;
[_agents enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
[_annotations addObject:[[[BronAgentMapViewAnnotation alloc] initWithAgency:obj] autorelease]];
}];
NSLog(@"num of annot = %d", _annotations.count); //num of annot = 120
_mapView.showsUserLocation = YES;
if (_showUserLocation) {
_mapView.showsUserLocation = YES;
}
[_annotations enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
[_mapView addAnnotation: obj];
}];
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
_annotations = [[NSMutableArray array] retain];
}
return self;
}
- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation
{
// in case it's the user location, we already have an annotation, so just return nil
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
// handle our three custom annotations
//
if ([annotation isKindOfClass:[BronAgentMapViewAnnotation class]])
{
// try to dequeue an existing pin view first
static NSString *bronAgentMapViewAnnotationIdentifier = @"BronAgentMapViewAnnotationIdentifier";
MKPinAnnotationView *pinView = (MKPinAnnotationView *)
[_mapView dequeueReusableAnnotationViewWithIdentifier:bronAgentMapViewAnnotationIdentifier];
if (pinView == nil)
{
// if an existing pin view was not available, create one
MKPinAnnotationView *customPinView = [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:bronAgentMapViewAnnotationIdentifier] autorelease];
customPinView.pinColor = MKPinAnnotationColorPurple;
customPinView.animatesDrop = NO;
customPinView.canShowCallout = YES;
// add a detail disclosure button to the callout which will open a new view controller page
//
// note: you can assign a specific call out accessory view, or as MKMapViewDelegate you can implement:
// - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control;
//
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[rightButton addTarget:self
action:@selector(showDetails:)
forControlEvents:UIControlEventTouchUpInside];
rightButton.tag = [(BronAgentMapViewAnnotation *) annotation annotationId];
customPinView.hidden = [(BronAgentMapViewAnnotation *) annotation isHidden];
customPinView.rightCalloutAccessoryView = rightButton;
return customPinView;
}
else
{
pinView.rightCalloutAccessoryView.tag = [(BronAgentMapViewAnnotation *) annotation annotationId];
pinView.hidden = [(BronAgentMapViewAnnotation *) annotation isHidden];
pinView.annotation = annotation;
}
return pinView;
}
return nil;
}
能帮忙吗?
http://www.appcoda.com/ios-programming-101-drop-a-pin-on-map-with-mapkit-api/看到这个链接.. – Jitendra
你确定你的数组在addobject之后不是空的吗? – james075
是的,我确定,我使用NSLog(@“%@”,_annotation.count)来查看对象的数量...... – Nubaslon