How to place annotations RANDOMLY in Mapkit Swift - ios

Question

I want to know how to pin annotations randomly in a MapView
let latitude: CLLocationDegrees = 33.606800
let longitude: CLLocationDegrees = -111.845360
let location:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
//map annotation
let annotation = MKPointAnnotation()
annotation.coordinate = location
annotation.title = "Taliesin West"
annotation.subtitle = "Design"
map.addAnnotation(annotation)

Answer 1

For Anyone who wants the solution:
First: Adding Random Annotation according to current Location
Generating the Annotations:
func generateAnnoLoc() {
var num = 0
//First we declare While to repeat adding Annotation
while num != 15 {
num += 1
//Add Annotation
let annotation = MKPointAnnotation()
annotation.coordinate = generateRandomCoordinates(70, max: 150) //this will be the maximum and minimum distance of the annotation from the current Location (Meters)
annotation.title = "Annotation Title"
annotation.subtitle = "SubTitle"
mapView.addAnnotation(annotation)
}
}
Generating Coordinates:
func generateRandomCoordinates(min: UInt32, max: UInt32)-> CLLocationCoordinate2D {
//Get the Current Location's longitude and latitude
let currentLong = currentLoc.coordinate.longitude
let currentLat = currentLoc.coordinate.latitude
//1 KiloMeter = 0.00900900900901° So, 1 Meter = 0.00900900900901 / 1000
let meterCord = 0.00900900900901 / 1000
//Generate random Meters between the maximum and minimum Meters
let randomMeters = UInt(arc4random_uniform(max) + min)
//then Generating Random numbers for different Methods
let randomPM = arc4random_uniform(6)
//Then we convert the distance in meters to coordinates by Multiplying the number of meters with 1 Meter Coordinate
let metersCordN = meterCord * Double(randomMeters)
//here we generate the last Coordinates
if randomPM == 0 {
return CLLocationCoordinate2D(latitude: currentLat + metersCordN, longitude: currentLong + metersCordN)
}else if randomPM == 1 {
return CLLocationCoordinate2D(latitude: currentLat - metersCordN, longitude: currentLong - metersCordN)
}else if randomPM == 2 {
return CLLocationCoordinate2D(latitude: currentLat + metersCordN, longitude: currentLong - metersCordN)
}else if randomPM == 3 {
return CLLocationCoordinate2D(latitude: currentLat - metersCordN, longitude: currentLong + metersCordN)
}else if randomPM == 4 {
return CLLocationCoordinate2D(latitude: currentLat, longitude: currentLong - metersCordN)
}else {
return CLLocationCoordinate2D(latitude: currentLat - metersCordN, longitude: currentLong)
}
}
Second: Adding Random Annotation on all of the earth
erdekhayser Code to get a Random Float number
func randomBetweenNumbers(firstNum: CGFloat, secondNum: CGFloat) -> CGFloat {
return CGFloat(arc4random()) / CGFloat(UINT32_MAX) * abs(firstNum - secondNum) + min(firstNum, secondNum)
}
And then Calling:
func generateAnnoLoc() {
var num = 0
//First we declare While to repeat adding Annotation
while num != 15 {
num += 1
//Add Annotation
let annotation = MKPointAnnotation()
annotation.coordinate = CLLocationCoordinate2D(latitude: CLLocationDegrees(randomBetweenNumbers(-90, secondNum: 90)), longitude: CLLocationDegrees(randomBetweenNumbers(-180, secondNum: 180)))
//-180 is the minimum of longitude and 180 is the maximum
//-90 is the minimum of latitude and 90 is the maximum
annotation.title = "Annotation Title"
annotation.subtitle = "SubTitle"
mapView.addAnnotation(annotation)
}
}
Third: Adding Random Annotation in Specific Country
You only want the Bounding box of the country or city You can find it Here
this Will Generate Random Coordinates in Egypt:
CLLocationCoordinate2D(latitude: CLLocationDegrees(randomBetweenNumbers(22, secondNum: 24.698099)), longitude: CLLocationDegrees(randomBetweenNumbers(31.674179, secondNum: 36.89468)))

Answer 2

You can use random double values between coordinate values in the earth for example:
do{
let latitude: CLLocationDegrees = randomLatitude()
let longitude: CLLocationDegrees = randomLongtitude()
let location: CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longtitude)
annotation = MKPointAnnotation()
annotation.coordinate = location
map.addAnnotation(annotation)
}while count == 15
P.S. Random value for swift you can look at this