I'm writing some unit tests and, because of开发者_高级运维 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?
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)
An update to this answer for Swift
buttonObj.sendActionsForControlEvents(.TouchUpInside)
EDIT: Updated for Swift 3
buttonObj.sendActions(for: .touchUpInside)
Swift 3:
self.btn.sendActions(for: .touchUpInside)
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.
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 & action.
if(notHappy){
SEL exit = self.navigationItem.rightBarButtonItem.action;
id world = self.navigationItem.rightBarButtonItem.target;
[world performSelector:exit];
}
Here, rightBarButtonItem
is of type UIBarButtonItem
.
For Xamarin iOS
btnObj.SendActionForControlEvents(UIControlEvent.TouchUpInside);
Reference
Swift 5:
class ViewController: UIViewController {
@IBOutlet weak var theTextfield: UITextField!
@IBOutlet weak var someButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
theTextfield.text = "Pwd"
someButton.sendActions(for: .touchUpInside)
}
@IBAction func someButtonTap(_ sender: UIButton) {
print("button tapped")
}
}
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: "title", style: .done, target: self, action: #selector(doSomething))
action.sendAction()
Swift 4:
self .yourButton(self)
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