I don't have a server set up yet, but my app requires the location of other people on the app to work. I need help taking each location and putting it with all the others in an array to be used, and later sent back to the phone. Thanks in advance.
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
let location = locations.last
let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 1, longitudeDelta: 1))
self.mapView.setRegion(region, animated: true)
self.locationManager.stopUpdatingLocation()//
}
I am not sure if I understand your intent completely, but here are some ad hoc comments:
Dictionary might be more practical data storage for this purpose. Individual users can be added/removed, directly accessed when the user position changes and needs to be updated and if you want, you can access the data in the same fashion as Array.
Consider using requestLocation instead of didUpdateLocations if you need just one reading.
I think CloudKit might have all you need to implement the server part.
In order to find the region of the map that encompasses all locations, you need to take all coordinates and find top left and bottom right coordinate and use that in the MKCoordinateRegion
Related
I'm trying to go to another area after a location is input (zip, address, city, st). It works-SOMETIMES. After I move the map (zoom out or move around), I'm not able to search for an area using the location. I thought I should call startUpdatingLocation again, but that didn't seem to work. Any help would be greatly appreciated considering this is my first time working with maps. Code below:
let geocoder = CLGeocoder()
geocoder.geocodeAddressString(self.zipCode.text!.capitalized) {
placemarks, error in
if error == nil {
let placemark = placemarks?.first
let lat = placemark?.location?.coordinate.latitude
let lon = placemark?.location?.coordinate.longitude
let center = CLLocationCoordinate2D(latitude: lat ?? 0.0, longitude: lon ?? 0.0)
print("\(self.zipCode.text) lat \(lat) long \(lon)")
let mRegion = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.2, longitudeDelta: 0.2))
self.mapView.setRegion(mRegion, animated: true)
}
else{
print("Error finding location \(self.zipCode.text!)")
I would need a little more context to give you an exact answer (like where in the code are you calling this, how often are you doing, what is the string dress value), but as far as I can see the problem could be:
lat or Lon could be nil and would default to 0.0 (?? operator)
all the code is running inside the closure, so it could be a scope problem
Also, taking a quick look at Apple documentation I found the following:
After initiating a forward-geocoding request, do not attempt to initiate another forward- or reverse-geocoding request. Geocoding requests are rate-limited for each app, so making too many requests in a short period of time may cause some of the requests to fail. When the maximum rate is exceeded, the geocoder passes an error object with the value CLError.Code.network to your completion handler.
So it could be an problem with the amount of the requests you are doing in a sort amount of time
I would say that is due to the number of requests made within a small time interval. I experimented with Apple's location framework for a long time and found that a single app can't send multiple geocoding request within short time. If you try so, you will get an error.
i have a problem that i cant seem to find the answer anywhere, i have a global CLLocationManager() variable, in the viewController, so that i can see when the user enters or leave a location with the locationManager callBacks, and it works perfectly with only one location at a time, but i want to make the app monitor 2 or more locations at the same time.
I created a function to start it:
var coreLocationManger = CLLocationManager()
func setMonitoredRegion(location:CLLocation) {
let startLocation = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
let monitoredRegion = CLCircularRegion(center: startLocation, radius: 100, identifier: "Local Region")
coreLocationManger.startMonitoring(for: monitoredRegion)
coreLocationManger.allowsBackgroundLocationUpdates = true
coreLocationManger.delegate = self
monitoredRegion.notifyOnEntry = true
monitoredRegion.notifyOnExit = true
}
this func, asks for a location to be managed, and when i use this multiple times with various locations, it just manages the last location that was given!
Do you guys have any tips on that?
Thank you
You keep overwriting the region each time you call the function. Make sure region identifier is different for each location.
I'm trying to use the whereKey, nearGeoPoint. The only problem is my location is in an array of locations. How would I get a single location from this array? Here is my code below...
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
postQuery.whereKey("locations", nearGeoPoint: PFGeoPoint(latitude: locations[0].coordinate.latitude, longitude: locations[0].coordinate.longitude), withinMiles: 30)
}
From the documentation of the CLLocationManagerDelegate:
This array always contains at least one object representing the current location. If updates were deferred or if multiple locations arrived before they could be delivered, the array may contain additional entries. The objects in the array are organized in the order in which they occurred. Therefore, the most recent location update is at the end of the array.
If you want to send the most recent location to Parse you should use locations.last
I don't know about anyone else, but EventKit seems to have very little in terms resources and tutorials online for you to refer to for help.
I need to trigger an alarm when a user hits a radius of a set of coordinates, I wasn't sure of the best ay to do this, I was torn between local notifications, and EventKit reminders.
I decided to go for eventKit as I felt that I could do more with more the alarms and it was the most practical way to do it however, having not known much about EventKit i had some issues.
Anyway I've managed to get together and build a sample project which works and triggers an alert when the user leaves their current location, the only problem is, is that I almost want to do the complete opposite of that, I want to trigger an alert when the user enters a set of coordinates, I assume that most of the code is transferrable, however I seem to be stuck on one bit mainly.
// Creates an EKStructuredLocation Instance with a title of "Current Location"
let location = EKStructuredLocation(title: "Current Location")
// Uses the last location update extracted from the locations array to supply you're current location
location.geoLocation = locations.last as! CLLocation
// Location is added to a newly created alarm instance
let alarm = EKAlarm()
alarm.structuredLocation = location
// This alarm is triggered when the user moves away from the location proximity
alarm.proximity = EKAlarmProximityLeave
stationReminder.addAlarm(alarm)
I'm struggling to find how to set the location of the alarm to coordinates rather than users location.
I tried changing this
location.geoLocation = locations.last as! CLLocation
to
location.geoLocation = CLCircularRegion(circularRegionWithCenter: CLLocationCoordinate2D(latitude: 37.33233141, longitude: -122.03121860), radius: 50.0, identifier: "Location1")
but this doesn't work, i believe i am on the right track but i am throwing up this error: Cannot assign a value of type 'CLCircularRegion!' to a value of type 'CLLocation!'
I've tried loads of things with no resolve, does anybody have any experience with this and know how to help?
I also assume i'll have to change the following from this
alarm.proximity = EKAlarmProximityLeave
to this
alarm.proximity = EKAlarmProximityEnter
UPDATE
I've taken on board some comments below and tried a bunch of other things to get this to work, I feel like I am so close but somethings just missing. I cannot get this alarm to trigger. Excuse all the code comments, it's just so you can see some of the attempts i have made at fixing this.
can anyone see anything wrong with this code for the alarm?
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
// Stops location manager from sending further updates
locationManager.stopUpdatingLocation()
// Creates a new EKReminder which is named and initialised with text from the UITextField
let stationReminder = EKReminder(eventStore: appDelegate!.eventStore)
stationReminder.title = locationText.text
// Stores the previously created EKReminder in the default calendar
stationReminder.calendar = appDelegate!.eventStore!.defaultCalendarForNewReminders()
// Creates an EKStructuredLocation Instance with a title of "Current Location"
let location = EKStructuredLocation(title: "Destination: Bournemouth Station")
// Uses the last location update extracted from the locations array to supply you're current location
// location.geoLocation = locations.last as! CLLocation
// location.geoLocation = CLCircularRegion(circularRegionWithCenter: CLLocationCoordinate2D(latitude: 37.33233141, longitude: -122.03121860), radius: 50.0, identifier: "Location1")
// location.geoLocation = CLLocation(latitude: 50.742771, longitude: -1.895072)
location.radius = 50.0
location.geoLocation = CLLocation(latitude:50.742771, longitude:-1.895072)
// location.radius = 10.0 // metres
// Location is added to a newly created alarm instance
let alarm = EKAlarm()
alarm.structuredLocation = location
// This alarm is triggered when the user moves away from the location proximity
// alarm.proximity = EKAlarmProximityEnter
alarm.proximity = EKAlarmProximityEnter // "geofence": we alarm when *arriving*
// but this will have no effect until Reminders is granted Location access...
// and in iOS 8 it won't even ask for it until it is launched
// also, in iOS 8 the separate background usage pref is withdrawn;
// instead, auth of Reminders for "when in use" covers this...
// ...because it means "this app *or one of its features* is visible on screen"
stationReminder.addAlarm(alarm)
// Now we have a fully configured reminder which we save in the Event Store
var error: NSError?
appDelegate!.eventStore?.saveReminder(stationReminder,
commit: true, error: &error)
if error != nil {
println("Reminder failed with error \(error?.localizedDescription)")
}
}
Looks like EKEvent has an EKStructuredLocation, which you are using correctly. However, you need to be careful of the type of the geoLocation property. It should be a CLLocation, which is not the same as a CLCircularRegion.
Steps to fix:
check the docs for EKStructuredLocation https://developer.apple.com/library/mac/documentation/EventKit/Reference/EKStructuredLocationClassRef/index.html
set the location.geoLocation to a CLLocation that you create from latitude, longitude coordinates. (check the docs for CLLocation: https://developer.apple.com/library/mac/documentation/CoreLocation/Reference/CLLocation_Class/index.html#//apple_ref/swift/cl/CLLocation)
geoLocation = CLLocation(latitude: 37.33233141, longitude: -122.03121860)
set the geoLocation.radius separately location.radius = 50.0
at that point setting proximityEnter should work as you expected
I am working on an app for iOS 7 and I need to find the location of the user and then check to see what other users are also at that same location. I need it to update as soon as the user opens the app as well as update every so often and will display the users at the same location. I have looked at the available examples, but there doesn't seem to be enough on this using Parse. Can anyone give me any help on how to go about doing this, or if anyone knows of some examples similar to what I'm trying to do I would greatly appreciate it. Thanks in advance!
You need to break your problem down and tackle the various pieces -
Obtain the user's location when the app opens and periodically
The Location and Maps programming guide is a good starting point. You can use CLLocationManager to obtain your initial location and you can register for the significant location change event to get updates periodically, even when your app isn't running. Apple has example code plus there are plenty of other examples out there - Just search using "Core Location examples"
Store the user's location in your Parse database
There are examples and documentation on Parse.com showing how to do this. You can also provide a web service that allows your app to query the database for other users at the same location
Identify other users at the same location when your app isn't running
You can use Parse background jobs to trawl your database, match user locations and send push notifications to your users. Again there are examples on Parse.com showing how to set up background jobs and push notifications
this may help this will get your current location then save to parse, its just a matter of querying parse to pull the data down
func locationManager(manager: CLLocationManager!, didUpdateLocations
locations: [AnyObject]!) {
var userLocation : CLLocation = locations[0] as! CLLocation
var latitude = userLocation.coordinate.latitude
var longitude = userLocation.coordinate.longitude
var latDelta : CLLocationDegrees = 0.01
var lonDelta : CLLocationDegrees = 0.01
var span : MKCoordinateSpan = MKCoordinateSpanMake(latDelta,
lonDelta)
var location : CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
var region : MKCoordinateRegion = MKCoordinateRegionMake(location, span)
self.mapView.setRegion(region, animated: true)
let testObject = PFObject(className: "User")
let currentPoints = PFGeoPoint(latitude: latitude, longitude: longitude)
testObject.setValue(currentPoints, forKey: "currentLocation")
testObject.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in
if (success) {
dispatch_async(dispatch_get_main_queue()) {
println("added to parse")
}
} else {
println(error)
}
}
}