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MapKit Tutorial: Overlay Views

Go beyond standard maps in MapKit with overlay views. Learn how to use polylines, polygons and overlay images to keep your users better informed!


This is a companion discussion topic for the original entry at https://www.raywenderlich.com/1916-mapkit-tutorial-overlay-views

In my app , I need to paint a few streets of a city I did was go to googlemaps , took the few street coordinates and used the overlay , however the coordinates do not fit on the street , how can I overcome this problem ? Great tutorial :slight_smile:

How should I manage a large number of overlays I have (e.g. ~8000 across the country) noting there will be only a small number in a given view typically as the users typically zoom in a bit. Also noting I want to have direction arrows out from the current user location to the currently “visible” overlays (i.e. on the screen) at a given time? There are Overlays and NOT Annotations keep in mind. Specifically:

Q1 - Should I load up all the overlays into the app upfront? Or should I be manually managing myself which ones need to be displays at the given time and load them, remove them?

If I should load them all up up front then:

Q2 - Does MKMapView actually intelligently render them when visible only? It doesn’t seem like this???

Q3 - How do I get a list of currently “visible” overlays from my MapView to create the direction pointers from the current user location? I can’t see any function in Mapview to allow this? So does this imply I would need to manually check through all overlays (i.e. whole 8000) continually to see which ones are visible manually?

thanks

after run in
MapOptionsViewController.swift
error

Downcast from ‘UITableViewCell?’ to ‘UITableViewCell’ only unwraps optionals; did you mean to use ‘!’?

any tips how to solve?

change the error line to this:

let cell = tableView.dequeueReusableCellWithIdentifier(“OptionCell”) as UITableViewCell!

let me know if it does not work!

Hi, this is really good, and this is exactly what i need.
but i can’t get it to work in xcode 8 and swift 3.
i’m new to this programming, so if you could translate it to swift 3, i
would be really happy.
thanks henrik

Here is a version for swift 3