How to click a button programmatically?

Question

I have 2 view controllers which should be swapped according to userinput. So, I want to switch the views programatically based on the input I get from a text file.

Algorithm :  if(input == 1) {     Go to View Controller 1 } else if(input ==2) {     Go to View Controller 2  } 

Any help on how to click the button programmatically or load that particular viewcontroller with input?

Answer 1

To fire an event programmatically you need to call sendActionsForControlEvent

button.sendActionsForControlEvents(.TouchUpInside) 

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Swift 3

button.sendActions(for: .touchUpInside) 

Answer 2

Or you can just put all the logic that you perform when a button gets clicked in a separate method, and call that method from your button's selector method.

@IBAction func someButtonPressed(button: UIButton) {     pushViewControllerOne() }  @IBAction func someButtonPressed(button: UIButton) {     pushViewControllerTwo() }  func pushViewControllerOne() {     let viewController = ViewControllerOne(nibName: "ViewControllerOne", bundle: nil)     pushViewController(viewController) }  func pushViewControllerTwo() {     let viewController = ViewControllerOne(nibName: "ViewControllerTwo", bundle: nil)     pushViewController(viewController) }  func pushViewController(viewController: UIViewController) {     navigationController?.pushViewController(viewController, animated: true) } 

Then instead of invoking programatically invoking a button press, just call the method pushViewControllerOne() or pushViewControllerTwo()