How to show different image on all the annotation pins on map? - ios

Question

I have two locations, one starting point and another end point, on these two points i want to add two different pin annotation
this is my code, the problem is i m getting the same image on both the locations
location is <+47.45025000,-122.30881700>
and location1 is <+47.62212000,-122.35410000>
- (MKAnnotationView *)mapView:(MKMapView *)mapViewer viewForAnnotation:(id <MKAnnotation>)annotation{
static NSString *mapIdentifier=#"mapIdentifier";
MKAnnotationView *myAnnotation=[mapViewer dequeueReusableAnnotationViewWithIdentifier:mapIdentifier];
CLLocationCoordinate2D parkCllocation=CLLocationCoordinate2DMake([_tripDetails[#"park_lat"] doubleValue], [_tripDetails[#"park_long"] doubleValue]);
MKPointAnnotation *jauntAnnotationPark =[[MKPointAnnotation alloc] init];
// jauntAnnotationPark.image = [UIImage imageNamed:#"pinks.jpg"];
jauntAnnotationPark.coordinate=parkCllocation;
CLLocationCoordinate2D orginCllocation=CLLocationCoordinate2DMake([_tripDetails[#"origin_lat"] doubleValue], [_tripDetails[#"origin_long"] doubleValue]);
MKPointAnnotation *jauntAnnotationOrgin =[[MKPointAnnotation alloc] init];
jauntAnnotationOrgin.coordinate=orginCllocation;
CLLocation *location = [[CLLocation alloc] initWithLatitude:[_tripDetails[#"origin_lat"] doubleValue] longitude:[_tripDetails[#"origin_long"] doubleValue]];
CLLocation *location1 = [[CLLocation alloc] initWithLatitude:[_tripDetails[#"park_lat"] doubleValue] longitude:[_tripDetails[#"park_long"] doubleValue]];
myAnnotation = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:mapIdentifier];
check=[[NSMutableArray alloc]initWithObjects:location,location1, nil];
for (NSString *location in check)
{
int i;
myAnnotation.image=[UIImage imageNamed:#"pin7#2x.png"];
}
if (!myAnnotation) {
myAnnotation = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:mapIdentifier];
}
else {
myAnnotation.annotation=annotation;
}
return myAnnotation;
}

Answer 1

Your code only sets one image - pin7 and your code also contains a lot of redundancy; you dequeue an annotation view into myAnnotation then alloc/init a new one then later you check if it is nil which it won't be because you just alloc/inited one.
Your check array contains CLLocation objects but you iterate the array into an NSString reference - and then don't do anything with the value anyway.
You can use this code to dequeue a view, allocate a new one if it can't be dequeued and then set the appropriate image; This code assumes that there are only two annotations and if it isn't the origin then it must be the end. If there are more than these two annotations then you need modify the code to account for that.
-(MKAnnotationView *)mapView:(MKMapView *)mapViewer viewForAnnotation:(id <MKAnnotation>)annotation{
static NSString *mapIdentifier=#"mapIdentifier";
MKAnnotationView *myAnnotation=[mapViewer dequeueReusableAnnotationViewWithIdentifier:mapIdentifier];
if (myAnnotation == nil) {
myAnnotation = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:mapIdentifier];
}
CLLocationCoordinate2D originCllocation=CLLocationCoordinate2DMake([_tripDetails[#"origin_lat"] doubleValue], [_tripDetails[#"origin_long"] doubleValue]);
if (originCllocation.latitude==annotation.coordinate.latitude && originCllocation.longitude==annotation.coordinate.longitude) {
myAnnotation.image=[UIImage imageNamed:#"startPin.png"];
} else {
myAnnotation.image=[UIImage imageNamed:#"endPin.png"];
}
return myAnnotation;
}

Answer 2

loop through the latitude and longitude values of your annotation coordinates.
and implement checks in view for annotation
for(int i=0; i <latArray.count; i++)
{
//annotation.coordinate.latitude
//annotation.coordinate.longitude
//compare your latitude and longitude values and change the image accordingly.
}

Answer 3

yup you can do it by putting condition also.
-(MKAnnotationView *)mapView:(MKMapView *)mapViewer viewForAnnotation:(id <MKAnnotation>)annotation
{
if (annotation.title.isEqualToString(#"Source"))
{
myAnnotation.image=[UIImage imageNamed:#"startPin.png"];
} else {
myAnnotation.image=[UIImage imageNamed:#"endPin.png"];
}