iOS MKMapView zoom to show all markers

Question

I\'m working with MKMapView and have plotted several points on the map. I have used the MKCoordinateRegion and MKCoordinateSpan to ena

Answer 1

Modified Answer with all Perfect Working Code.

//Zooming the ploted Area
- (void)zoomToAnnotationsBounds:(NSArray *)latLongArray {
        __block CLLocationDegrees minLatitude = DBL_MAX;
        __block CLLocationDegrees maxLatitude = -DBL_MAX;
        __block CLLocationDegrees minLongitude = DBL_MAX;
        __block CLLocationDegrees maxLongitude = -DBL_MAX;

        [latLongArray enumerateObjectsUsingBlock:^(NSString *latLongObj, NSUInteger latLongIdx, BOOL *stop) {
            latLongObj = [latLongArray objectAtIndex:latLongIdx];
            NSArray *latLongPoint = [latLongObj componentsSeparatedByString:@","];

            double annotationLat = [[latLongPoint objectAtIndex:0] doubleValue];
            double annotationLong = [[latLongPoint objectAtIndex:1] doubleValue];
            minLatitude = fmin(annotationLat, minLatitude);
            maxLatitude = fmax(annotationLat, maxLatitude);
            minLongitude = fmin(annotationLong, minLongitude);
            maxLongitude = fmax(annotationLong, maxLongitude);
        }];

        [self setMapRegionForMinLat:minLatitude minLong:minLongitude maxLat:maxLatitude maxLong:maxLongitude];
}


-(void) setMapRegionForMinLat:(double)minLatitude minLong:(double)minLongitude maxLat:(double)maxLatitude maxLong:(double)maxLongitude {

    // pad our map by 10% around the farthest annotations

    // we'll make sure that our minimum vertical span is about a kilometer
    // there are ~111km to a degree of latitude. regionThatFits will take care of
    // longitude, which is more complicated, anyway.

    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;

    MKCoordinateRegion scaledRegion = [regionsMapView regionThatFits:region];
    [regionsMapView setRegion:scaledRegion animated:YES];

}