In my MapView there are multiple annotationView, each with their own image, it happens that sometimes when I press the image, it disappears and never comes back if not reloading the viewController. Why does this happen?
- (MKAnnotationView *)mapView:(MKMapView *)mapview viewForAnnotation:(id
<MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[AnnotationView class]]) {
return nil;
}
if ([annotation isKindOfClass:[AnnotationCustom class]]){
static NSString* AnnotationIdentifier = #"AnnotationIdentifier";
MKPinAnnotationView *annotationView = (MKPinAnnotationView*) [mapView
dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:AnnotationIdentifier];
if ([self.nameTable isEqualToString:#"Movies"]){
if(UI_USER_INTERFACE_IDIOM()== UIUserInterfaceIdiomPhone){
annotationView.image = [UIImage imageNamed:#"iphone_movies.png"];
}else{
annotationView.image = [UIImage imageNamed:#"ipad_movies.png"];
}
}else if ([self.nameTable isEqualToString:#"Food_Drink"]){
if(UI_USER_INTERFACE_IDIOM()== UIUserInterfaceIdiomPhone){
annotationView.image = [UIImage imageNamed:#"iphone_foodDrink.png"];
}else{
annotationView.image = [UIImage imageNamed:#"ipad_foodDrink.png"];
}
}else if (......){
//same procedure for all annotationView
}
UIButton *detailButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
annotationView.rightCalloutAccessoryView=detailButton;
annotationView.canShowCallout = YES;
annotationView.draggable = YES;
return annotationView;
}
Something is missing?
Are you doing anything in
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
I also noticed that you're not setting the annotation for annotation views. When setting up an annotation view you should also do
annotationView.annotation = annotation;
I replaced
MKPinAnnotationView *annotationView = (MKPinAnnotationView*) [mapView
dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:AnnotationIdentifier];
with
MKAnnotationView *annotationView = (MKAnnotationView*) [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
annotationView = [[MKAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier];
Related
I have changed my MapView pin image but I am getting this problem that some of the point wont change the pin image and some of them change. Where would be the problem? I have added an example.
My Code:
- (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *pinAnnotation = nil;
MKAnnotationView *pinView = nil;
if(annotation != locationMap.userLocation)
{
static NSString *defaultPinID = #"myPin";
pinAnnotation = (MKPinAnnotationView *)[locationMap dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinAnnotation == nil )
pinAnnotation = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
pinAnnotation.canShowCallout = YES;
pinAnnotation.animatesDrop = YES;
pinAnnotation.enabled = YES;
//pinAnnotation.image = [UIImage imageNamed:#"pin.png"];
pinView.image = [UIImage imageNamed:#"pin.png"];
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pinAnnotation.rightCalloutAccessoryView = infoButton;
}
return pinAnnotation;
return pinView;
}
Use a regular MKAnnotationView, not the MKPinAnnotationView subclass. Even though you can set the image it isn't guaranteed to stick because it can and will set the pin image back again.
I have a mapView with a strange behavior: When I open it, everything works fine. The user (blue with circles) is going to be located and the 3 pins are in position. But (I don't know why) after a some time, the blue point turns into a pin - but only when I have slow connection speed.
Here's what I got:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:#"pinView"];
if (!pinView && ![annotation isKindOfClass:[MKUserLocation class]])
{
pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"pinView"];
pinView.pinColor = MKPinAnnotationColorRed;
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pinView.rightCalloutAccessoryView = rightButton;
if (annotation == self.locationZH1)
{
[pinView setTag:1];
}
else if (annotation == self.locationZH2)
{
[pinView setTag:2];
}
else if (annotation == self.locationZH3)
{
[pinView setTag:3];
}
else if (annotation == self.locationLU1)
{
[pinView setTag:4];
}
}
else
{
pinView.annotation = annotation;
}
return pinView;
}
Be sure to avoid providing an annotation view for the built in user location marker.
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
//check annotation is not user location
if([annotation isEqual:[mapView userLocation]])
{
//bail
return nil;
}
static NSString *annotationViewReuseIdentifer = #"map_view_annotation";
//dequeue annotation view
MKPinAnnotationView *annotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:annotationViewReuseIdentifer];
if(!annotationView)
{
annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:annotationViewReuseIdentifer];
}
//set annotation view properties
[annotationView setAnnotation:annotation];
return annotationView;
}
By checking for the user location annotation earlier, you can provide an early out for returning nil rather than allocating a new MKPinAnnotationView and returning that instead.
The documentation for - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation states:
If the object in the annotation parameter is an instance of the
MKUserLocation class, you can provide a custom view to denote the
user’s location. To display the user’s location using the default
system view, return nil.
Swift 3 Solution :
if annotation is MKUserLocation{
return nil
}
You need to return nil when annotation == mapView.userLocation to show the blue dot for user location and the circle around it
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:#"pinView"];
if (!pinView && ![annotation isKindOfClass:[MKUserLocation class]])
{
pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"pinView"];
pinView.pinColor = MKPinAnnotationColorRed;
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pinView.rightCalloutAccessoryView = rightButton;
if (annotation == self.locationZH1)
{
[pinView setTag:1];
}
else if (annotation == self.locationZH2)
{
[pinView setTag:2];
}
else if (annotation == self.locationZH3)
{
[pinView setTag:3];
}
else if (annotation == self.locationLU1)
{
[pinView setTag:4];
}
return pinView;
}
else
{
pinView.annotation = annotation;
return Nil;
}
}
On initial load, the annotations show just fine. But if I scroll the map, they all disappear and the code is only called for the user location, not the other annotations in the viewForAnnotation delegate method.
Plot Pins
-(void)viewDidLoad{
...Download Coordinates and Data from Web here...
[self.mapView addAnnotation:pin];
}
Delegate Method
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
//Player's Pin
if([annotation class] == MKUserLocation.class) {
return nil;
}
//Cluster Pin
if([annotation isKindOfClass:[REVClusterPin class]]){
REVClusterPin *pin = (REVClusterPin *)annotation;
if( [pin nodeCount] > 0 ){
pin.title = #"___";
MKAnnotationView *annotationView = (REVClusterAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:#"cluster"];
if( !annotationView ){
annotationView = (REVClusterAnnotationView*)
[[REVClusterAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"cluster"];
}
annotationView.image = [UIImage imageNamed:#"cluster.png"];
[(REVClusterAnnotationView*)annotationView setClusterText:
[NSString stringWithFormat:#"%i",[pin nodeCount]]];
annotationView.canShowCallout = NO;
return annotationView;
}
}
//Player Pin
if([annotation isKindOfClass:[ZEPointAnnotation class]]){
ZEPointAnnotation *pin = (ZEPointAnnotation *)annotation;
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:#"pin"];
if(!annotationView){
annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"pin"];
}
annotationView.canShowCallout = YES;
annotationView.draggable = NO;
...Create Pin Data Here...
return annotationView;
}
return nil;
}
remove animations. that will solve your problem
I was wonderring if there is a way to change those red pins that are used as markers. And if there is a way, how to do it?
you can use 3 types of color pins in mapView are bellow..
MKPinAnnotationColorGreen;
MKPinAnnotationColorPurple
MKPinAnnotationColorRed
and if you want to add customview or image then you can add with programatically
also you can change pin in delegate method of MKMapView like bellow..
- (MKAnnotationView *)mapView:(MKMapView *)_mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[_mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
if (annotation == _mapView.userLocation)
{
// pinView.pinColor = MKPinAnnotationColorRed;
// return pinView;
return nil;
}
pinView.pinColor = MKPinAnnotationColorGreen; // you can use MKPinAnnotationColorPurple, MKPinAnnotationColorRed;
pinView.canShowCallout = YES;
pinView.animatesDrop = NO;
return pinView;
}
and for custom image or pin, use bellow code..
- (MKAnnotationView *)mapView:(MKMapView *)_mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *AnnotationViewID = #"annotationViewID";
MKAnnotationView *annotationView = (MKAnnotationView *)[_mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];
if (annotationView == nil)
{
annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
}
annotationView.image = [UIImage imageNamed:#"yourImageName"];//add any image which you want to show on map instead of red pins
annotationView.annotation = annotation;
return annotationView;
}
I have an annotation showing in mapkit with a custom image, showing fine,
but the annotation shows after taping the pin,
how can I have the annotation showing by default?, when I start the view? whit out tapping the pin.
- (MKAnnotationView *)mapView:(MKMapView *)mv viewForAnnotation:(id <MKAnnotation>)annotation
{
if([annotation isKindOfClass:[MKUserLocation class]])
return nil;
NSString *annotationIdentifier = #"PinViewAnnotation";
MKPinAnnotationView *pinView = (MKPinAnnotationView *) [mapView
dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];
if (!pinView)
{
pinView = [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation
reuseIdentifier:annotationIdentifier] autorelease];
[pinView setPinColor:MKPinAnnotationColorGreen];
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
UIImageView *houseIconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"tijereta.png"]];
pinView.leftCalloutAccessoryView = houseIconView;
[houseIconView release];
}
else
{
pinView.annotation = annotation;
}
return pinView;
}
thanks
you can use this
[mapView selectAnnotation:pinView animated:YES]; //here pinView is your annotation and mapview is your map
hope that helped