swift - Updating Current Location -

let locationmanager = cllocationmanager()  @iboutlet var map: mkmapview!  func getlocation ()-> cllocation! {     self.locationmanager.startupdatinglocation()     sleep(1)     self.locationmanager.stopupdatinglocation()     var x = locationmanager.location     return x }  override func viewdidload() {     super.viewdidload()     self.locationmanager.desiredaccuracy = kcllocationaccuracybest     self.locationmanager.requestwheninuseauthorization()      var mapcoord:cllocation! = getlocation()     var maplat:double! = mapcoord.coordinate.latitude //where thread error     var maplong:double! = mapcoord.coordinate.longitude //setup of rest of map completed 

my code above, in swift. receiving error:

thread error of unexpected nil value

while calling coordinates getlocation() function. changed both maplat , maplong test causing nil. app load receive message in output saying current location cannot updated have no asked permission; however, have function request permission in beginning of viewdidload(). have used format before on different project , has worked, know must missing obvious, etc. thank help.

your code wrong, , won't work.

you can't write procedural code starts location updates, pauses, stops location updates, , gets location.

you have set location manager's delegate, start location updates, , return.

at point after that, system call locationmanager:didupdatelocations method.

then need check accuracy of location , make sure it's accurate enough. (frequently first several location readings when gps first powered quite bad, , don't meet desired accuracy. suggest horizontal accuracy of 200 m or so, depending on app's requirements.

if reading accurate enough can turn off updates , use location needs.

p.s. never, ever, ever use sleep() function on main thread. in fact, novice ios mac os developer, should pretend sleep function doesn't exist.