Call function from other ViewController

Question

I have two ViewControllers, FirstViewController and SecondViewController. Both have an own Swift file, FirstViewController.swift and

Answer 1

If you want to show alert view to second viewcontroller from firstview controller when go to it you can do something like,

  self.performSegueWithIdentifier("your segue identifier", sender: self)  // or whatever way if you are not using storyboard or segue

    let alert = UIAlertView(title: "Working!", message: "This function was called from FirstViewController!", delegate: nil, cancelButtonTitle: "Okay")
    alert.show()

If you want to set any variables of secondviewcontroller then you need to implement prepareForSegue method. (if you are using segue).

Second thing you can show alertview in viewDidload of secondViewController also.