uiresponder

in Swift 2 this code works fine override func nextResponder() -> UIResponder? { // it's called when user make any touch event return super.nextResponder() } it's basically helps to get notification about any user interaction. in Swift 3 now it's a variable not a function and I can't even observe it with didSet. so how to use the code above in Swift 3 You can override the variable: override var next: UIResponder? { get { // do something return super.next } } As the variable is defined as a read-only variable, implementing didSet doesn't make sense. You're not supposed to set this variable.

I'm trying to provide an IBAction method for common functionality that is required at various parts of the app. i.e. Login is implemented modally, and if it succeeds results in a notification that allows all loaded view controllers to react to this event (transition from anonymous to authenticated) @interface MyAppDelegate : NSObject <UIApplicationDelegate> { ... } - (IBAction)loginTapped:(id)sender; @end I set the action of that button to the First Responder in IB, however the responder chain doesn't give MyAppDelegate a chance to respond. My problem is that, I don't want to replicate the

I'm trying to handle touch events with touchesBegan in an overlay to a parent UIView but also allow the touch input to pass through to sibling UIView s underneath. I expected there would be some straight-forward way to process a touch event and then say "now send it to the next responder as if this one didn't exist", but all I can find is the nextResponder method which appears to be giving back the parent to my overlay view. That parent is then not really passing it onto the next sibling of that overlay view so I'm stuck uncertain how to do what seems like a simple task that is usually

I have a UIScrollView that is set to have a clear background. Part of the scrollview does have content, but part does not (so it shows other views behind it). I would like to be able to click through the UIScrollView and to the MKMapView behind, but only for the transparent portion of the UIScrollView. I have found some code which I am having a real hard time understanding how to get working: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { if (![self yourMethodThatDeterminesInterestingTouches:touches withEvent:event]) [self.nextResponder touchesBegan:touches withEvent:event]

I have simple subclass of UIViewController (code below). If I attach inputAccessoryView, my viewcontroller is never deallocated. If I do not set inputAccessoryView in viewDidLoad, dealloc is called as expected. Am I missing something? @interface IMTestViewController : UIViewController @property (nonatomic, strong) UIView *messageInputView; @property(nonatomic, readwrite, strong) UIView *inputAccessoryView; @end @implementation IMTestViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]