how to programmatically fake a touch event to a UIButton

Question

I m writing some unit tests and  because of the nature of this particular app  it s important that I get as high up the UI chain as possible   So  what I d like to do is programmatically trigger a button-press  as if the user had pressed the button in the GUI    Yes  yes -- I could just call the IBAction selector but  again  the nature of this particular app makes it important that I fake the actual button press  such that the IBAction be called from the button  itself    What s the preferred method of doing this

User · Answer

For Xamarin iOS  btnObj SendActionForControlEvents UIControlEvent TouchUpInside     Reference

User · Answer

If you want to do this kind of testing  you   ll love the UI Automation support in iOS 4  You can write JavaScript to simulate button presses  etc  fairly easily  though the documentation  especially the getting-started part  is a bit sparse

User · Answer

An update to this answer for Swift  buttonObj sendActionsForControlEvents  TouchUpInside    EDIT  Updated for Swift 3  buttonObj sendActions for   touchUpInside

User · Answer

It s handy for people who write Unit Tests without UI Tests  -  Swift 5 way to solve it for UIBarButtonItem  which does not have sendAction method like UIButton etc  extension UIBarButtonItem       func sendAction             guard let myTarget   target else   return           guard let myAction   action else   return           let control  UIControl   UIControl           control sendAction myAction  to  myTarget  for  nil           And now you can simply  let action   UIBarButtonItem title   quot title quot   style   done  target  self  action   selector doSomething   action sendAction

User · Answer

Swift 3   self btn sendActions for   touchUpInside

User · Answer

It turns out that  buttonObj sendActionsForControlEvents UIControlEventTouchUpInside    got me exactly what I needed  in this case  EDIT  Don t forget to do this in the main thread  to get results similar to a user-press   For Swift 3  buttonObj sendActions for   touchUpInside

User · Answer

In this case  UIButton is derived from UIControl  This works for object derived from UIControl    I wanted to reuse  UIBarButtonItem  action on specific use case  Here  UIBarButtonItem doesn t offer method sendActionsForControlEvents   But luckily  UIBarButtonItem has properties for target  amp  action    if notHappy                    SEL exit   self navigationItem rightBarButtonItem action           id  world   self navigationItem rightBarButtonItem target            world performSelector exit        Here  rightBarButtonItem is of type UIBarButtonItem

User · Answer

Swift 4   self  yourButton self

[ios] how to programmatically fake a touch event to a UIButton?

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