Building iOS Map Applications in Swift 3 (2)

Normally, the general steps for getting longitude and latitude of user location.

1. Add CoreLocation.framework to BuildPhases -> Link Binary With Libraries (no longer necessary as of XCode 7.2.1)
2. Add import CoreLocation to your class - probably ViewController.swift
3. Add CLLocationManagerDelegate to your class declaration
4. Add
   NSLocationWhenInUseUsageDescription and
   NSLocationAlwaysUsageDescription
   to plist
5. Initialize location manager :

locationManager = CLLocationManager()
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()

get User Location By:

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    var userLocation:CLLocation = locations[0] as! CLLocation
    let long = userLocation.coordinate.longitude;
    let lat = userLocation.coordinate.latitude;
    //Do What ever you want with it       
}

Close iOS Keyboard Using Swift

There are two ways to close iOS keyboard.

1. Close the virtual keyboard while finishing typing at any textField

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    textField.resignFirstResponder()
    return true
}

2. Close the virtual keyboard while one or more fingers touch down in a view or window

Assume that finish typing in passwordFiled.

@IBOutlet weak var passwordField: UITextField!

Add passwordField.delegate = self to function viewDidLoad.

override func viewDidLoad() {
    super.viewDidLoad()    
    passwordField.delegate   = self
}

Add a function touchesBegan.

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    self.view.endEditing(true)
    self.passwordField.resignFirstResponder()
    super.touchesBegan(touches, with:event)
}

That’s it!

Building iOS Map Applications in Swift 3

When using Mapkit in Xcode, all we need is to do configurations in the following steps:

1. Enable Maps capability

project > capabilities > Maps > on

2. Adding import libraries

Add these two lines in ViewController.swift

import CoreLocation
import MapKit

3. Adding keys in info.plist

NSLocationWhenInUseUsageDescription : 需要時取得使⽤用者位置
NSLocationAlwaysUsageDescription : 不斷的取得位置

4. Create a Location.gpx if using simulator and customizing default location

Setting the default location:
product > scheme > edit scheme