I'm trying to display multiple arrays of locations on my mapView with the below code (Restaurants, Parks, Meet Ups & Stores). When I open the app, not all addresses inside the arrays are displayed on my mapView (even though all data is returned) - e.g. sometimes only 'Stores' and 'Parks' arrays of annotations will show up on my map, but Restaurants aren't visible (even though data for all arrays is returned successfully). If I close out and reopen the app, sometimes Parks will show on the map, but nothing else. Any idea why this happens, and how I can fix it? Code updated below. Been at this forever!
Note: ParksAnnotation, RestAnnotation, meetupAnn, & StoreAnnotation are all MKPointAnnotation classes.
UPDATE (10/13/2020): I tried logging 'placemarks' under the block of code that retrieves and geocodes my 'Stores' coordinates. It appears as though self.storeData is populated, as is the created NSDictionary storeFields. That said, when I log 'placemarks', it isn't returning any coordinates, even though storeFields[#"address"] is populated. The other blocks of code seem to be doing their job just fine (ie. retrieving Meet Ups and retrieving Parks). So Meet Ups, Restaurants and Parks annotations appear fine, but all Stores annotations aren't populated. This happens to at least one type of annotation (sometimes it's Stores that's missing, other times it's Parks) at random when I launch the app. I can't for the life of me sort out why this is happening.
See below code:
MapViewController.m
#import "StoreAnnotation.h"
#import "ParksAnnotation.h"
#import "RestAnnotation.h"
#import "meetupAnn.h"
#interface MapViewController ()
#end
#implementation MapViewController
-(void)viewWillAppear:(BOOL)animated {
NSMutableDictionary *viewParamsallUsers1 = [NSMutableDictionary new];
[viewParamsallUsers1 setValue:#"hosted_meet_ups" forKey:#"view_name"];
[DIOSView viewGet:viewParamsallUsers1 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.meetUps = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *allMeetups in self.meetUps) {
NSString *location = allMeetups[#"where"];
NSString *userNames = allMeetups[#"node_title"];
NSString *userBio = allMeetups[#"body"];
self.alertMessage = [allMeetups[#"node_title"] mutableCopy];
CLGeocoder *geocoderFriend = [[CLGeocoder alloc] init];
[geocoderFriend geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
MKCoordinateRegion region = self.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
meetupAnn *meet = [[meetupAnn alloc] init];
meet.coordinate = placemark.coordinate;
meet.title = userNames;
meet.subtitle = userBio;
meet.index = index; // Store index here.
[self.mapView addAnnotation:meet];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failure: %#", [error localizedDescription]);
}];
/// GRAB ALL RESTAURANT LOCATIONS ///
NSMutableDictionary *viewParams6 = [NSMutableDictionary new];
[viewParams6 setValue:#"restaurants" forKey:#"view_name"];
[DIOSView viewGet:viewParams6 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.neighbourhoodData = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *multiplelocationsFriend in self.neighbourhoodData) {
NSString *location = multiplelocationsFriend[#"address"];
NSString *userNames = multiplelocationsFriend[#"node_title"];
NSString *ampRemoved = [userNames stringByReplacingOccurrencesOfString:#"amp;" withString:#""];
NSString *userBio = multiplelocationsFriend[#"body"];
self.x3 = multiplelocationsFriend[#"x3"];
CLGeocoder *geocoderFriend = [[CLGeocoder alloc] init];
[geocoderFriend geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
MKCoordinateRegion region = self.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
RestAnnotation *point1 = [[RestAnnotation alloc] init];
point1.coordinate = placemark.coordinate;
point1.title = ampRemoved;
point1.subtitle = userBio;
point1.index = index; // Store index here.
[self.mapView addAnnotation:point1];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failure: %#", [error localizedDescription]);
}];
NSString *test = self.areaName;
NSLog(#"SHOW TEST %#", test);
/// GRAB ALL STORE LOCATIONS ///
NSMutableDictionary *viewParams7 = [NSMutableDictionary new];
[viewParams7 setValue:#"stores" forKey:#"view_name"];
[DIOSView viewGet:viewParams7 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.storesData = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *storeFields in self.storesData) {
NSString *location = storeFields[#"address"];
NSString *userNames = storeFields[#"node_title"];
NSString *ampRemoved = [userNames stringByReplacingOccurrencesOfString:#"amp;" withString:#""];
NSString *userBio = storeFields[#"body"];
self.x3 = storeFields[#"x3"];
CLGeocoder *geocoderFriend = [[CLGeocoder alloc] init];
[geocoderFriend geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
MKCoordinateRegion region = self.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
StoreAnnotation *point2 = [[StoreAnnotation alloc] init];
point2.coordinate = placemark.coordinate;
point2.title = ampRemoved;
point2.subtitle = userBio;
point2.index = index; // Store index here.
[self.mapView addAnnotation:point2];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failure: %#", [error localizedDescription]);
}];
/// GRAB ALL PARKS LOCATIONS ///
NSMutableDictionary *viewParams8 = [NSMutableDictionary new];
[viewParams8 setValue:#"parks" forKey:#"view_name"];
[DIOSView viewGet:viewParams8 success:^(AFHTTPRequestOperation *operation, id responseObject) {
self.parksData = [responseObject mutableCopy];
int index = 0;
for (NSMutableDictionary *parkFields in self.parksData) {
// NSLog(#"WHAT IS IN FRIENDS %#", self.friendData);
NSString *location = parkFields[#"address"];
NSString *userNames = parkFields[#"node_title"];
NSString *ampRemoved = [userNames stringByReplacingOccurrencesOfString:#"amp;" withString:#""];
NSString *userBio = parkFields[#"body"];
self.x3 = parkFields[#"x3"];
CLGeocoder *geocoderFriend = [[CLGeocoder alloc] init];
[geocoderFriend geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
MKCoordinateRegion region = self.mapView.region;
region.span.longitudeDelta /= 150.0;
region.span.latitudeDelta /= 150.0;
ParksAnnotation *point3 = [[ParksAnnotation alloc] init];
point3.coordinate = placemark.coordinate;
point3.title = ampRemoved;
point3.subtitle = userBio;
point3.index = index; // Store index here.
[self.mapView addAnnotation:point3];
}
}
];
index = index + 1;
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failure: %#", [error localizedDescription]);
}];
}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{
MKCoordinateRegion mapRegion;
mapRegion.center = mapView.userLocation.coordinate;
mapRegion.span.latitudeDelta = 0.5;
mapRegion.span.longitudeDelta = 0.5;
[mapView setRegion:mapRegion animated: YES];
[self.locationManager stopUpdatingLocation];
self.locationManager = nil;
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 8000, 8000);
[mapView setRegion:[mapView regionThatFits:region] animated:YES];
[mapView addAnnotations:[mapView annotations]];
});
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation{
if([annotation isKindOfClass:[StoreAnnotation class]]) {
static NSString *identifier = #"stores";
MKAnnotationView *storesView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(storesView == nil) {
storesView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
storesView.displayPriority = MKFeatureDisplayPriorityRequired;
storesView.canShowCallout = YES;
storesView.image = [UIImage imageNamed:#"storeann4.png"];
}
else {
storesView.annotation = annotation;
}
return storesView;
}
if([annotation isKindOfClass:[meetupAnn class]]) {
static NSString *identifier = #"meetUps";
MKAnnotationView *pulsingView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(pulsingView == nil) {
pulsingView.displayPriority = MKFeatureDisplayPriorityRequired;
pulsingView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
pulsingView.image = [UIImage imageNamed:#"meetupbeacon.png"];
pulsingView.canShowCallout = YES;
}
else {
pulsingView.annotation = annotation;
}
return pulsingView;
}
if([annotation isKindOfClass:[ParksAnnotation class]]) {
static NSString *identifier = #"parks";
MKAnnotationView *parksView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(parksView == nil) {
parksView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
parksView.displayPriority = MKFeatureDisplayPriorityRequired;
parksView.image = [UIImage imageNamed:#"parksann.png"];
parksView.canShowCallout = YES;
}
else {
parksView.annotation = annotation;
}
return parksView;
}
if([annotation isKindOfClass:[RestAnnotation class]]) {
static NSString *identifier = #"rests";
MKAnnotationView *restView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(restView == nil) {
restView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
restView.displayPriority = MKFeatureDisplayPriorityRequired;
restView.image = [UIImage imageNamed:#"restann.png"];
restView.canShowCallout = YES;
}
else {
restView.annotation = annotation;
}
return restView;
}
As Ramis said, the problem is that you're setting the displayPriority before you even instantiate the pulsingView. Thus, the MKAnnotationView you subsequently instantiate never got its displayPriority set.
That having been said, I'd suggest a slightly different implementation, though. Specifically, I'd move the configuration of the annotation view into its own subclass, rather than cluttering the view controller with this sort of code:
#interface MeetUpAnnotationView: MKAnnotationView
#end
#implementation MeetUpAnnotationView
- (instancetype)initWithAnnotation:(id<MKAnnotation>)annotation reuseIdentifier:(NSString *)reuseIdentifier {
self = [super initWithAnnotation:annotation reuseIdentifier:reuseIdentifier];
if (self) {
self.displayPriority = MKFeatureDisplayPriorityRequired;
self.canShowCallout = YES;
self.image = [UIImage imageNamed:#"meetupbeacon.png"];
}
return self;
}
- (void)setAnnotation:(id<MKAnnotation>)annotation {
[super setAnnotation:annotation];
self.displayPriority = MKFeatureDisplayPriorityRequired;
}
#end
Then, if targeting iOS 11 or later, your view controller's viewDidLoad should register that subclass.
Now, if this is the only annotation view that you’re showing in iOS 11, you don't need a viewForAnnotation at all and can just register your default annotation view:
[self.mapView registerClass:[MeetUpAnnotationView class] forAnnotationViewWithReuseIdentifier:MKMapViewDefaultAnnotationViewReuseIdentifier];
And having registered the annotation view class, you're done. No viewForAnnotation is needed or desired.
The only time you have to implement viewForAnnotation in iOS 11 and later is if you have multiple custom annotation view types on your map. In that case, you'd register them:
[self.mapView registerClass:[MeetUpAnnotationView class] forAnnotationViewWithReuseIdentifier:meetupIdentifier];
[self.mapView registerClass:[SomeOtherAnnotationView class] forAnnotationViewWithReuseIdentifier:someOtherIdentifier];
And then use dequeueReusableAnnotationViewWithIdentifier:forAnnotation: in your viewForAnnotation:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
if ([annotation isKindOfClass:[MeetupAnn class]]) {
return [mapView dequeueReusableAnnotationViewWithIdentifier:meetupIdentifier forAnnotation:annotation];
}
if ([annotation isKindOfClass:[SomeOtherAnnotation class]]) {
return [mapView dequeueReusableAnnotationViewWithIdentifier:someOtherIdentifier forAnnotation:annotation];
}
...
return nil;
}
As you can see, in iOS 11 (especially when you have only one annotation view type), the code is greatly simplified.
But if you need to support older iOS versions, you can't register the identifier and you have to use the older dequeueReusableAnnotationViewWithIdentifier:, but I'd still let the annotation view subclass take care of configuring itself. But, a more subtle problem in your code is that you are not setting the annotation in an else clause, so make sure to do that, e.g.:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
if ([annotation isKindOfClass:[MeetupAnn class]]) {
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:meetupIdentifier];
if (!annotationView) {
annotationView = [[MeetUpAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:meetupIdentifier];
} else {
annotationView.annotation = annotation;
}
return annotationView;
}
return nil;
}
You should check if some of your geocoding requests are failing inconsistently.
CLGeocoder rate limits your requests and if you do too many requests in a short time, you'll receive an error. https://developer.apple.com/documentation/corelocation/clgeocoder/1423509-geocodeaddressstring?language=objc
Check if you are getting any reason for failure inside NSError* error inside the completionHandler block.
As many times as it fails, you should see as many less number of annotations on the MapView because it is not entering the following code path.
if (placemarks && placemarks.count > 0) {
// Not entering here
}
if (nil != error) {
// Could land here
}
The only other reason would be not properly calculating map region to show all annotations in screen. Make sure you are calculating/adjusting the region correctly upon each annotation being added to the mapView.
// Define these variables globally in the view controller
CLLocationDegrees minLatitude = 90.0;
CLLocationDegrees maxLatitude = -90.0;
CLLocationDegrees minLongitude = 180.0;
CLLocationDegrees maxLongitude = -180.0;
// Call following method every time a new annotation needs to be added to the mapView
-(void)addAnnotation:(id<MKAnnotation>)annotation toMapView:(MKMapView*)mapView {
// Add the annotation to map
[mapView addAnnotation:annotation];
// Set the map region to make it visible along with all other annotations
CLLocationDegrees latitude = annotation.coordinate.latitude;
CLLocationDegrees longitude = annotation.coordinate.longitude;
minLatitude = min(minLatitude, latitude);
maxLatitude = max(maxLatitude, latitude);
minLongitude = min(minLongitude, longitude);
maxLongitude = max(maxLongitude, longitude);
CLLocationDegrees latitudeDelta = (maxLatitude - minLatitude);
CLLocationDegrees longitudeDelta = (maxLongitude - minLongitude);
CLLocationDegrees midLatitude = (maxLatitude - latitudeDelta/2);
CLLocationDegrees midLongitude = (maxLongitude - longitudeDelta/2);
CLLocationCoordinate2D center = CLLocationCoordinate2DMake(midLatitude, midLongitude);
MKCoordinateSpan span = MKCoordinateSpanMake(latitudeDelta, longitudeDelta);
MKCoordinateRegion region = MKCoordinateRegionMake(center, span);
if (CLLocationCoordinate2DIsValid(center)) {
[mapView setRegion:region animated:YES];
}
}
You are assigning MKFeatureDisplayPriorityRequired to empty object. Try to assign display priority in two case:
When pulsingView is not nil.
After pulsingView allocated.
if([annotation isKindOfClass:[meetupAnn class]]) {
static NSString *identifier = #"currentLocation";
MKAnnotationView *pulsingView = (MKAnnotationView *)[self.friendsMapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if(pulsingView == nil) {
pulsingView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
pulsingView.displayPriority = MKFeatureDisplayPriorityRequired;
pulsingView.canShowCallout = YES;
pulsingView.image = [UIImage imageNamed:#"meetupbeacon.png"];
NSLog(#"Location Returned");
} else {
pulsingView.displayPriority = MKFeatureDisplayPriorityRequired;
// TODO: Do map pin initial setup.
}
}
In my app, I get the latitude and longitude along with some other data from a Parse query. However, only about 100 annotations get added, when there should be 156. I verify in console that it is getting the coordinates for the missing pieces on the map, it just simply doesn't add an annotation for them. Am I missing something obvious?
-(void) viewWillAppear:(BOOL)animated {
CLLocationCoordinate2D coord = {.latitude = 15.8700320, .longitude = 100.9925410};
MKCoordinateSpan span = {.latitudeDelta = 3, .longitudeDelta = 3};
MKCoordinateRegion region = {coord, span};
[mapViewUI setRegion:region];
PFQuery *query = [PFQuery queryWithClassName:#"Share"];
[query setLimit:1000];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
self.mapViewData = objects;
NSLog(#"HOW MANY ARE THERE %lu", (unsigned long)[objects count]);
for (int i=0;i<[objects count];i++)
{
// Question * q = [[Question alloc]init];
PFObject * obj = [self.mapViewData objectAtIndex:i];
NSLog(#"%#", obj);
self.theObject = obj;
NSString *string = obj[#"WhereAt"];
NSArray *stringArray = [string componentsSeparatedByString: #","];
CLLocationDegrees myLatitude = [[stringArray objectAtIndex:0] doubleValue];
CLLocationDegrees myLongitude = [[stringArray objectAtIndex:1] doubleValue];
CLLocationCoordinate2D coord2 = {.latitude = myLatitude, .longitude = myLongitude};
NSLog(#"LATITUDE %#", [stringArray objectAtIndex:0]);
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = #"MMM dd, yyyy";
MKPointAnnotation *annotation2 = [[MKPointAnnotation alloc] init];
[annotation2 setCoordinate:coord2];
[annotation2 setTitle:obj[#"FamilyName"]];
[annotation2 setSubtitle:obj[#"Result"]];
[mapViewUI addAnnotation:annotation2];
}
} else {
// Log details of the failure
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
if (annotation == mapViewUI.userLocation)
{
return nil;
}
else
{
MKPinAnnotationView *annotationView = [[MKPinAnnotationView alloc] init];
annotationView.enabled = YES;
annotationView.canShowCallout = YES;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = #"MMM dd, yyyy";
if ([annotation.subtitle isEqualToString:#"Accepted Bible"]) {
NSLog(#"Accepted");
annotationView.pinTintColor = [UIColor greenColor];
}
else if ([annotation.subtitle isEqualToString:#"Requested Different Material"]) {
NSLog(#"Different");
annotationView.pinTintColor = [UIColor blackColor];
}
else if ([annotation.subtitle isEqualToString:#"Not Home"]) {
NSLog(#"Not Home");
annotationView.pinTintColor = [UIColor yellowColor];
}
else if ([annotation.subtitle isEqualToString:#"Rejected Bible"]) {
NSLog(#"Rejected");
annotationView.pinTintColor = [UIColor redColor];
}
return annotationView;
}
return nil;
}
I don't know if this is the cause of your issue but you should be 'recycling' the annotation views like this:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(ClubPinAnnotation *)annotation {
MKAnnotationView *pinView = [mapView dequeueReusableAnnotationViewWithIdentifier:#"MyPinIdentifier"];
if (!pinView) {
pinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"MyPinIdentifier"];
} else {
pinView.annotation = annotation;
}
// Set up the pin view properties
return pinView;
}
Also, check that your lat/longs are correct. The map view will only call for the pin views it actually needs for the current view, so if you have some that are for instance at (0,0) they won't be shown until you zoom out to include the coast of Africa.
I am trying get the coordinate of each pin I select on my map. Pins are the local search results that users search on the map. I have an issue that every pin I select it give me the same value. Can anyone help me with this please? Thanks in advance.
- (IBAction)searchAction:(id)sender {
[sender resignFirstResponder];
[self.mapView removeAnnotations:[self.mapView annotations]];
[self performSearch]; }
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{
// If it's the user location, just return nil.
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
MKPinAnnotationView *mypin = [[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:#"current"];
//mypin.pinColor = MKPinAnnotationColorPurple;
mypin.backgroundColor = [UIColor clearColor];
UIButton *goToDetail = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
mypin.rightCalloutAccessoryView = goToDetail;
mypin.draggable = NO;
mypin.highlighted = YES;
mypin.animatesDrop = TRUE;
mypin.canShowCallout = YES;
return mypin;
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
MKPointAnnotation *annotation = view.annotation;
self.tappedCoord = annotation.coordinate;
// Longs are the same for every pin I select
NSLog(#"%f", [[view annotation] coordinate].longitude);
}
- (void)performSearch {
MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
request.naturalLanguageQuery = _searchText.text;
request.region = _mapView.region;
self.matchingItems = [[NSMutableArray alloc] init];
MKLocalSearch *search = [[MKLocalSearch alloc]initWithRequest:request];
[search startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error) {
if (response.mapItems.count == 0)
NSLog(#"No Matches");
else
for (MKMapItem *item in response.mapItems)
{
[self.matchingItems addObject:item];
MKPointAnnotation *annotation = [[MKPointAnnotation alloc]init];
annotation.coordinate = item.placemark.coordinate;
annotation.title = item.name;
annotation.subtitle = [NSString stringWithFormat:#"%#, %# %#",
item.placemark.addressDictionary[#"Street"],
item.placemark.addressDictionary[#"State"],
item.placemark.addressDictionary[#"ZIP"]];
//NSLog(#"%#", item.placemark.addressDictionary);
[_mapView addAnnotation:annotation];
}
}];
}
This question already has answers here:
How to use custom icons with mapKit framework?
(2 answers)
Closed 8 years ago.
I am new to Xcode, i need to set the image in annotation point. I am trying to replace the typical iOS mapkit "pin" with a particular image. I'm new to coding so I'm not sure exactly why this isn't working, but here is what i've attempted
My code is
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *urlMapString=[NSString stringWithFormat:#"http://www.xxxx.com/xxxx_webservice/map.php?format=json&truckno=%#",nam2];
NSURL *urlMap=[NSURL URLWithString:urlMapString];
NSData *dataMap=[NSData dataWithContentsOfURL:urlMap];
NSError *errorMap;
NSDictionary *jsonMap = [NSJSONSerialization JSONObjectWithData:dataMap options:kNilOptions error:&errorMap]; NSArray *resultsMap = [jsonMap valueForKey:#"posts"];
NSArray *resMap = [resultsMap valueForKey:#"post"];
NSArray *latitudeString=[resMap valueForKey:#"latitude"];
NSString *latOrgstring = [latitudeString objectAtIndex:0];
double latitude=[latOrgstring doubleValue];
NSArray *longitudeString=[resMap valueForKey:#"longitude"];
NSString *longOrgstring = [longitudeString objectAtIndex:0];
double longitude=[longOrgstring doubleValue];
MKCoordinateRegion myRegion;
//Center
CLLocationCoordinate2D center;
center.latitude=latitude;
center.longitude=longitude;
//Span
MKCoordinateSpan span;
span.latitudeDelta=THE_SPAN;
span.longitudeDelta=THE_SPAN;
myRegion.center=center;
myRegion.span=span;
//Set our mapView
[MapViewC setRegion:myRegion animated:YES];
//Annotation
//1.create coordinate for use with the annotation
CLLocationCoordinate2D wimbLocation;
wimbLocation.latitude=latitude;
wimbLocation.longitude=longitude;
Annotation * myAnnotation= [Annotation alloc];
myAnnotation.image = [UIImage imageNamed:#"icon.gif"];
CLLocation *someLocation=[[CLLocation alloc]initWithLatitude:latitude longitude:longitude];
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder reverseGeocodeLocation:someLocation completionHandler:^(NSArray *placemarks, NSError *error) {
NSDictionary *dictionary = [[placemarks objectAtIndex:0] addressDictionary];
addressOutlet=[dictionary valueForKey:#"Street"];
City=[dictionary valueForKey:#"City"];
State=[dictionary valueForKey:#"State"];
myAnnotation.coordinate=wimbLocation;
if (addressOutlet!=NULL&&City!=NULL)
{
myAnnotation.title=addressOutlet;
myAnnotation.subtitle=[NSString stringWithFormat:#"%#,%#", City, State];
myAnnotation.image = [UIImage imageNamed:#"icon.gif"];
}
else if (addressOutlet==NULL&&City!=NULL)
{
myAnnotation.title=City;
myAnnotation.subtitle=[NSString stringWithFormat:#"%#,%#", City, State];
myAnnotation.image = [UIImage imageNamed:#"icon.gif"];
}
else if (addressOutlet!=NULL&&City==NULL)
{
myAnnotation.title=addressOutlet;
myAnnotation.subtitle=[NSString stringWithFormat:#"%#", State];
myAnnotation.image = [UIImage imageNamed:#"icon.gif"];
}
else if(addressOutlet==NULL&&City==NULL)
{
myAnnotation.title=State;
myAnnotation.subtitle=[NSString stringWithFormat:#"%#",State];
myAnnotation.image = [UIImage imageNamed:#"icon.gif"];
}
[self.MapViewC addAnnotation:myAnnotation];
}];
}
Please guide me to set the image..
Thanks in Advance
You can use mapView Delegate method.
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
if (annotation == mapView.userLocation)
return nil;
static NSString *s = #"identifier";
MKAnnotationView *pin = [mapView dequeueReusableAnnotationViewWithIdentifier:s];
if (!pin) {
pin = [[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:s];
pin.canShowCallout = YES;
pin.image = [UIImage imageNamed:#"pin.png"];
pin.calloutOffset = CGPointMake(0, 0);
}
return pin;
}
How do I add a button to my placemarks and then get it to push onto a view controller?
- (void)viewDidLoad
{
[super viewDidLoad];
// Set "More" logo in navigation bar
self.navigationItem.titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Navigation"]];
appDelegate=[[UIApplication sharedApplication] delegate];
// Set longatude and latitude to tyne and wear
CLLocationCoordinate2D center = CLLocationCoordinate2DMake(54.995184, -1.566699);
// Set span to cover area
MKCoordinateSpan span = MKCoordinateSpanMake(0.5, 0.5);
// Set region
MKCoordinateRegion regionToDisplay = MKCoordinateRegionMake(center, span);
[self.nearbyMapView setRegion: regionToDisplay];
for (int i = 0; i < [[appDelegate offersFeeds] count]; i++)
{
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
NSString *plotAddress = [[[appDelegate offersFeeds] objectAtIndex:i] valueForKey:#"addressline"];
NSString *plotTitle = [[[appDelegate offersFeeds] objectAtIndex:i] valueForKey:#"title"];
[geocoder geocodeAddressString:plotAddress completionHandler:^(NSArray *placemarks, NSError *error) {
if (placemarks && placemarks.count > 0)
{
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc]initWithPlacemark:topResult];
// Set title
MKPointAnnotation *pa = [[MKPointAnnotation alloc] init];
pa.coordinate = placemark.location.coordinate;
pa.title = plotTitle;
// Add placemark to map
[self.nearbyMapView addAnnotation:pa];
}
}];
}
}
I've had a look at MKAnotationView but struggling to understand how to get this working with CLPlacemark.
Add this before you add mapview to self.view
-(void)viewDidLoad
{
MKPointAnnotation *annotation = [[MKPointAnnotation alloc]init];
annotation.coordinate = yourCoordinate;
annotation.title = #"Title";
annotation.subtitle = #"SubTitle";
[mapView1 addAnnotation:annotation];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *pinView = nil;
static NSString *defaultPinID = #"identifier";
pinView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil )
{
pinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID];
annotationView.enabled = YES;
pinView.canShowCallout = YES;
UIButton *btn = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
//Accessoryview for the annotation view in ios.
pinView.rightCalloutAccessoryView = btn;
}
else
{
pinView.annotation = annotation;
}
pinView.annotation = annotation;
return pinView;
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
//Put your button stuff here...
}
I hope it is useful to you