How do I forward an action message to the next responder?

Question

if I have something like:

void maybeHandleMessage: sender: AnyObject {
    if isHandling() {
        handle()
    } else {
        // forward action message to next responder in the responder chain
    }
}

What code do I need in the else clause to forward the maybeHandleMessage?

[self.nextResponder doSomething:param]; – danh Sep 30 '14 at 14:01 — danh, Sep 30 '14 at 14:01

score 0 · Answer 1 · answered Sep 30 '14 at 14:04

0

If your object is a kind of subclass of UIResponder there is a method

func nextResponder() -> UIResponder?

you can try

answered Sep 30 '14 at 14:04

dopcn

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This is found in the cocoa event handling guide: "Warning: Although NSResponder declares a number of action messages, it doesn’t actually implement them. You should never send an action message directly to a responder object of an unknown class. Always use the NSApplication method sendAction:to:from:, the NSResponder methods tryToPerform:with: or doCommandBySelector:, or check that the target responds using the NSObject method respondsToSelector:." So, is the only way to use the sendAction again? – corporate_fun Sep 30 '14 at 16:20

How do I forward an action message to the next responder?

1 Answers1