mapkit

问题 In my app I am showing location of some other person by getting their location (latitude and longitude) from server at particular interval. After getting I have to remove all annotations and drop new annotations based on the server data. But it looks very inefficient as when we have the annotation for the same user previously exists even then I'm removing and adding the same user annotation. So I want to know can we move the MKAnnotation from one coordinate to other? I have tried

问题 I want to have a MKAnnotationView to my pins on map (using MapKit) with next attributes: 1) image 2) details button 3) another details button 4) another details button? I have done actually adding image and details button with next code: annotationView.detailCalloutAccessoryView = snapshotView // snapshot view is a custom view // with image and its constraints let detailsButton = UIButton(type: .detailDisclosure) annotationView.rightCalloutAccessoryView = detailsButton So, the question is how

问题 In the Displaying Overlays on a Map section of the iOS Developer Library Location Awareness Programming Guide, there is an example that "shows a filled and stroked overlay covering the state of Colorado." // Define an overlay that covers Colorado. CLLocationCoordinate2D points[4]; points[0] = CLLocationCoordinate2DMake(41.000512, -109.050116); points[1] = CLLocationCoordinate2DMake(41.002371, -102.052066); points[2] = CLLocationCoordinate2DMake(36.993076, -102.041981); points[3] =

问题 In the Displaying Overlays on a Map section of the iOS Developer Library Location Awareness Programming Guide, there is an example that "shows a filled and stroked overlay covering the state of Colorado." // Define an overlay that covers Colorado. CLLocationCoordinate2D points[4]; points[0] = CLLocationCoordinate2DMake(41.000512, -109.050116); points[1] = CLLocationCoordinate2DMake(41.002371, -102.052066); points[2] = CLLocationCoordinate2DMake(36.993076, -102.041981); points[3] =

问题 I'm currently trying to decide wether to accept a client's proposal or not. Basically, I'm asked to create a MapView that displays markers at several locations on a map, with the additional requirement that the client's own map tiles are used instead of Google Maps'. I do not know yet how the client stores their own map tiles, but I was assured that I'd be able to convert them into any format I'd need. Is it possible to use different map tiles in MapKit's MapView? Do you have good online

问题 I need the same filled space around circle on the map as in Reminders app in iOS7. I think need to use the method applyFillPropertiesToContext:atZoomScale or fillPath:inContext: . 回答1: I solved my problem: - (void)drawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale inContext:(CGContextRef)context { // Fill full map rect with some color. CGRect rect = [self rectForMapRect:mapRect]; CGContextSaveGState(context); CGContextAddRect(context, rect); CGContextSetFillColorWithColor(context

问题 I can't figure out how to get the map to zoom in on the user location from viewDidLoad. I tried setting a region, and that didn't work. This is the code I have, any tips? @IBOutlet weak var mapView: MKMapView! var MapViewLocationManager:CLLocationManager! = CLLocationManager() var currentLocation: PFGeoPoint! = PFGeoPoint() override func viewDidLoad() { super.viewDidLoad() self.mapView.showsUserLocation = true mapView.delegate = self MapViewLocationManager.delegate = self mapView

问题 Would like to know what is proper way to get ETA (estimated time arrival) from any location to my current location, in consideration the following situation: a. ex. - I got from another device its location (lon/lat) and want to when the other person will pick me up... In this case what web-service can I use to get this info for the user? Does mapkit provides that kind of option? b. In case it will be done on the server-side and I'll just send my user location, what are the tools my server

问题 i am using mapkit how i can multiple line in MKAnnotation view . Every annotation there has title and subtitle. how i show sub title with multiple line with the help of auto layout ? i found it's Answer .plz try my answer. we just need to do code in - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation { } here i show the idea how to use autolayout with MKAnnotation . 回答1: extension for adding multiple lines: import MapKit // must import MapKit for

问题 I'm working on an iPhone game that uses an MKMapView as the playfield. After only a couple of minutes of play the app inevitably starts to get sluggish and eventually crashes due to low memory. After digging around the culprit seems to be that the map view constantly demands more memory. The game requires a lot of zooming and panning of the map so I can only assume that the map's cache of tiles just keeps growing until it runs out of memory. Is there any way to force the map view to flush it