I\'m new to IOS programming, I\'m displaying a view when a button is clicked, using the following code inside the button method.
@IBAction func moreButton(_
Inside the moreButton selected, you can do something like this
@IBAction func moreButton(_ sender: Any)
{
self.helpView.isHidden = false
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissView))
view.addGestureRecognizer(tap)
}
func dismissView() {
self.helpView.isHidden = true
self.view.removeGestureRecognizer(tap)
}
You can achieve what you want doing the following (tested with Swift 4.1 and Xcode 9.3):
class ViewController: UIViewController {
...
private var dismissViewTap: UITapGestureRecognizer?
override func viewDidLoad() {
super.viewDidLoad()
dismissViewTap = UITapGestureRecognizer(target: self, action: #selector(dismissView))
if let tap = dismissViewTap {
view.addGestureRecognizer(tap)
} // if let
} // viewDidLoad
@objc private func dismissView() {
guard let tap = dismissViewTap else {
return
} // guard
guard helpView.isHidden == false else {
return
} // guard
helpView.isHidden = true
view.removeGestureRecognizer(tap)
} // dismissView
...
} // ViewController
If you want to keep the gesture recognizer (maybe because you open helpView more than once) change dismissView to this version:
...
@objc private func dismissView() {
guard helpView.isHidden == false else {
return
} // guard
helpView.isHidden = true
} // dismissView
...
That's all...!
in my case I followed it by touchesEnded logic,
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
if([touch view]== self.UIViewThatNeedsToBeDismissed) {
NSLog(@"inside view touch");
} else {
NSLog(@"release it");
}
}
private func addClickToDismiss() {
let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissPresentedView(_:)))
tapRecognizer.cancelsTouchesInView = false
presentedViewController.view.superview?.isUserInteractionEnabled = true
presentedViewController.view.superview?.addGestureRecognizer(tapRecognizer)
}
@objc
private func dismissPresentedView(_ sender: Any?) {
presentedViewController.dismiss(animated: true)
}
If anyone wants some copy pasta, this is how you do it from a custom UIPresentationController
In touch began you should write like
override func touchesBegan(_ touches: Set<AnyHashable>, withEvent event: UIEvent) {
var touch: UITouch? = touches.first
//location is relative to the current view
// do something with the touched point
if touch?.view != yourView {
yourView.isHidden = true
}
}
You can use the below function some this check on the view name will not work but if you have more than one view the problem you will see that if you tap inside your second view the same action will perform. I would prefer to add tapGesture. This is the other solution.
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
}