how to show source and destination at a time in Mapview? [duplicate] - iphone

Question

This question already has answers here:
Finding Path/Route Between two points on MapKit in iPhone
(5 answers)
Closed 9 years ago.
I am using MKMapView to show route. I want to zoom out this map so that it will show both source at destination at a time.
how can I zoom out map as per distance so that it will show whole route in one screen.
I am using this code:
double maxLatitude = annotation.coordinate.latitude;
double maxLongitude = annotation.coordinate.longitude;
double minLatitude = annotation.coordinate.latitude;
double minLongitude = annotation.coordinate.longitude;
MKCoordinateRegion region;
region.center.latitude = (minLatitude + maxLatitude) / 2;
region.center.longitude = (minLongitude + maxLongitude) / 2;
region.span.latitudeDelta = (maxLatitude - minLatitude) * MAP_PADDING;
region.span.latitudeDelta = (region.span.latitudeDelta < MINIMUM_VISIBLE_LATITUDE)
? MINIMUM_VISIBLE_LATITUDE
: region.span.latitudeDelta;
region.span.longitudeDelta = (maxLongitude - minLongitude) * MAP_PADDING;
[self.mapView addAnnotation:annotation];
[self.mapView regionThatFits:region];

Answer 1

You can try it by the following method
for (int i = 1; i<[arrayOfPointsToFindDistance count]; i++) {
connection_listdata *detail_connection=[arrayOfPointsToFindDistance objectAtIndex:i];
[self findDistancewithConnecionList:detail_connection];
}
findDistancewithConnecionList method is given below.
-(void)findDistancewithConnecionList:(connection_listdata *)connectionlist{
NSLog(#"sssssss");
CLLocation *oldLoc = [[CLLocation alloc] initWithLatitude:connectionlist.coordinate_connection.latitude longitude: connectionlist.coordinate_connection.longitude];
for(int i =0; i<[mapArray count];i++){
NSLog(#"ghsghshhs");
NSMutableArray *firstArrayTemp = [mapArray objectAtIndex:i];
connection_listdata *detail_connection=[firstArrayTemp objectAtIndex:0];
CLLocation *newLoc = [[CLLocation alloc] initWithLatitude:detail_connection.coordinate_connection.latitude longitude: detail_connection.coordinate_connection.longitude];
CLLocationDistance d = [newLoc distanceFromLocation:oldLoc];
NSLog(#"distanceeeee:%f",d);
if(d <= 500){
NSLog(#"foundddd");
NSLog(#"maparray values= %#",mapArray);
[firstArrayTemp addObject:connectionlist];
[mapArray addObject:firstArrayTemp];
return;
}
[newLoc release];
}
NSMutableArray *array = [[NSMutableArray alloc]init];
[array addObject:connectionlist];
[mapArray addObject:array];
[array release];
[oldLoc release];
return;
}