Do one action when method is finished in Swift - ios

Question

I want do one action when one method is finished, I execute one method in other method and I want the second method stop until the first method is finished.
I have that method:
func ejecutarOBJC(){
let txtNombre = self.view.viewWithTag(4) as? UITextField
let textoNombre=txtNombre?.text
let txtContra = self.view.viewWithTag(5) as? UITextField
let textoContra=txtContra?.text
let instanceOfCustomObject: SQLViewController = SQLViewController()
instanceOfCustomObject.nombre = textoNombre;
instanceOfCustomObject.contra = textoContra;
instanceOfCustomObject.obtenerExistenciaUsuario()
}
And also the other method:
func otherMethod(){
ejecutarOBJC()
//I want continue with that method when the execution of the other method finish
}

Answer 1

This is how you would achieve this:
func methodOne() {
//Method one code here
methodTwo()
}
func methodTwo() {
//Method Two code here.
}
As per your comment, here is how to wait when using async code:
func methodOne() {
//Code goes here
methodTwo { () -> () in
//Method two has finished
}
}
func methodTwo(completion: () -> ()) {
//Code goes here
completion()
}

Answer 2

Use closures:
func callCompetionFunction()
{
// Tira mola meseda (do your stuff)
completionFunction("a parameter") { () -> Void in
print("function copleted")
}
}
func completionFunction(param: AnyObject, completion: ()->Void)
{
// Do your stuff
completion()
}
To test it in a view controller
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
callCompetionFunction()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func callCompetionFunction()
{
// Tira mola meseda (do your stuff)
print("do something here")
completionFunction("a parameter") { () -> Void in
print("function copleted")
}
}
func completionFunction(param: AnyObject, completion: ()->Void)
{
// Do your stuff
if param is String
{
print("parameter = \(param)")
}
print("going to execute completion closure")
completion()
}
}