Zooming Out to show User Location/Annotation

Question

I can zoom the map out to include the user's location and the annotation I want; however I have 2 issues.

1. I don't want the user's location to have a pin (see image1).
2. The pins are too close to the edges, and sometimes under the nav/tab bars (see image2). Need some padding but not sure how to accomplish this.

Any help is much appreciated. Below is my code for the map view controller.

#import "BuildingsMapViewController.h"
#import "BuildingsAnnotations.h"

@interface BuildingsMapViewController () 
@end

@implementation BuildingsMapViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    self.locationManager.distanceFilter = kCLDistanceFilterNone;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [self.locationManager startUpdatingLocation];


    BuildingsAnnotations *userAnnotation = [[BuildingsAnnotations alloc] init];
    userAnnotation.coordinate = self.locationManager.location.coordinate;


    self.mapView.delegate = self;
    self.navigationItem.title = self.title;

    CLLocationCoordinate2D startCenter = CLLocationCoordinate2DMake(42.334596, -83.049578);
    CLLocationDistance regionWidth = 1500;
    CLLocationDistance regionHeight = 1500;

    MKCoordinateRegion startRegion = MKCoordinateRegionMakeWithDistance(startCenter, regionWidth, regionHeight);
    [self.mapView setRegion:startRegion animated:YES];


    self.coordinate = CLLocationCoordinate2DMake(self.geoPoint.latitude,self.geoPoint.longitude);
    BuildingsAnnotations *annotation = [[BuildingsAnnotations alloc] init];
    annotation.coordinate = self.coordinate;
    annotation.title = self.navigationItem.title;
    annotation.subtitle = @"Click for Directions";
    [self.mapView addAnnotation:annotation];
    [self.mapView setCenterCoordinate:annotation.coordinate animated:YES];


    self.annotations = @[annotation, userAnnotation];
    [self.mapView showAnnotations:self.annotations animated:YES];

}

- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations {
    CLLocation *location = [locations lastObject];
    NSLog(@"lat%f - lon%f", location.coordinate.latitude, location.coordinate.longitude);
}

@end

UPDATE: Followed what Duncan said and got it to work. Here's my code:

// Get user coordinates
self.userLat = self.locationManager.location.coordinate.latitude;
self.userLong = self.locationManager.location.coordinate.longitude;

// Initialize and set arrays
self.lats = [[NSMutableArray alloc] init];
self.lngs = [[NSMutableArray alloc] init];

[self.lats addObject:[NSNumber numberWithDouble:self.userLat]];
[self.lats addObject:[NSNumber numberWithDouble:annotation.coordinate.latitude]];
[self.lngs addObject:[NSNumber numberWithDouble:self.userLong]];
[self.lngs addObject:[NSNumber numberWithDouble:annotation.coordinate.longitude]];

// Sort numbers in arrays
[self.lats sortUsingSelector:@selector(compare:)];
[self.lngs sortUsingSelector:@selector(compare:)];

// Get smallest/biggest coordinates
double smallestLat = [self.lats[0] doubleValue];
double smallestLng = [self.lngs[0] doubleValue];
double biggestLat = [[self.lats lastObject] doubleValue];
double biggestLng = [[self.lngs lastObject] doubleValue];

// Get Center Point and Span
CLLocationCoordinate2D annotationsCenter = CLLocationCoordinate2DMake((biggestLat + smallestLat) / 2, (biggestLng + smallestLng) / 2);
MKCoordinateSpan annotationsSpan = MKCoordinateSpanMake((biggestLat - smallestLat) * 1.75, (biggestLng - smallestLng) * 1.75);

// Create and set Region
MKCoordinateRegion region = MKCoordinateRegionMake(annotationsCenter, annotationsSpan);
[self.mapView setRegion:region];

Answer 1

So do some thinking on this.

If you don't want the user's location to be shown, turn it off the show current location flag for the map.

Turn on the location manager and ask for location updates.

in the location manager delegate method that gives you location updates, take the user's new location, and average it with the annotation you want to show (lat1 + lat2)/2, (long1 + long2)/2.

That'll give you a center-point between the 2. Then take the latitude delta between those two points, the longitude delta between those two points, multiply those deltas by a small scaling factor like 1.1 or 1.2, so the two points aren't right at the edges of the screen,, and feed those numbers into MKCoordinateSpanMake, and use the resulting span, plus the center point, to create a coordinate region, and set the map to that coordinate region.

Answer 2

For swift 3:

let annotation = MKPointAnnotation();
    annotation.coordinate = CLLocationCoordinate2DMake(LATITUDE, LONGITUDE);
    self.mapView.addAnnotation(annotation);


    let userlongitude = location.coordinate.longitude
    let userlatitude = location.coordinate.latitude
    let newDistance = CLLocation(latitude: userlatitude, longitude: userlongitude).distance(from: CLLocation(latitude: annotation.coordinate.latitude, longitude: annotation.coordinate.longitude))
    let region = MKCoordinateRegionMakeWithDistance(location.coordinate, 2 * newDistance, 2 * newDistance)
    let adjustRegion = self.mapView.regionThatFits(region)
    self.mapView.setRegion(adjustRegion, animated:true)

In above code "location" is CLLocation which holds the User current location.