2014/10/15 下午 10:10:56

iphone Programming Glossary: latitudedelta

http://stackoverflow.com/questions/1031787/zoom-in-a-mkmapview-programmatically

a buttom the zoom level must increase. This is my first approach MKCoordinateRegion zoomIn mapView.region zoomIn.span.latitudeDelta 0.5 mapView setRegion zoomIn animated YES However this code had no effect since I didn't update the longitudeDelta value... the longitudeDelta value. So I added this line zoomIn.span.longitudeDelta 0.5 Now it works but only sometimes. The latitudeDelta and longitudeDelta don't change in the same way I mean their values are not proportional. Any idea how to solve this iphone.. IN MKCoordinateRegion region Set Zoom level using Span MKCoordinateSpan span region.center mapView.region.center span.latitudeDelta mapView.region.span.latitudeDelta 2.0002 span.longitudeDelta mapView.region.span.longitudeDelta 2.0002 region.span span..

MKMapView Zoom and Region

http://stackoverflow.com/questions/1166444/mkmapview-zoom-and-region

point should be obvious it's the center point of the region. However span which is a MKCoordinateSpan consists of latitudeDelta the vertical distance represented by the region and longitudeDelta the horizontal distance represented by the region . A.. represented by the region . A brief example. Here's a toy MKCoordinateRegion center latitude 0 longitude 0 span latitudeDelta 8 longitudeDelta 6 The region could be described using its min and max coordinates as follows min coordinate lower left..

How to get left-top and right-buttom latitude and longitude of map in MapKit

http://stackoverflow.com/questions/1831634/how-to-get-left-top-and-right-buttom-latitude-and-longitude-of-map-in-mapkit

properly. How should I fix it MKCoordinateRegion region map region double topL topG bottomL bottomG if latitude 55 and latitudeDelta 126 topL is 118 and it will be not at top it will be at buttom of screen topL region.center.latitude region.span.latitudeDelta.. 126 topL is 118 and it will be not at top it will be at buttom of screen topL region.center.latitude region.span.latitudeDelta 2 topG region.center.longitude region.span.longitudeDelta 2 CLLocationCoordinate2D lt lt.latitude topL lt.longitude topG.. annotation.coordinate lt annotation.title @ Left map addAnnotation annotation annotation release if latitude 55 and latitudeDelta 126 bottomL is 7.23 and it will be not at bottom it will be at above bottom of screen bottomL region.center.latitude region.span.latitudeDelta..

Zooming MKMapView to fit annotation pins?

http://stackoverflow.com/questions/4680649/zooming-mkmapview-to-fit-annotation-pins

EDIT My initial thinking would be to use MKCoordinateRegionMake and calculate the coordinate centre longitudeDelta and latitudeDelta from my annotations. I am pretty sure this will work but I just wanted to check I was not missing anything obvious. Code.. lower.longitude eachLocation coordinate .longitude FIND REGION MKCoordinateSpan locationSpan locationSpan.latitudeDelta upper.latitude lower.latitude locationSpan.longitudeDelta upper.longitude lower.longitude CLLocationCoordinate2D locationCenter..

Displaying Pin with Title (annotation) once map loads

http://stackoverflow.com/questions/5589181/displaying-pin-with-title-annotation-once-map-loads

mapView.mapType MKMapTypeStandard CLLocationCoordinate2D coord latitude 12.3456 longitude 7.890 MKCoordinateSpan span latitudeDelta 0.05 longitudeDelta 0.05 MKCoordinateRegion region coord span mapView setRegion region self.view addSubview mapView FirstLocateViewController.h..