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Alex Rivera
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According to the iOS documentation, the responder chain is used to pass touch events "up the chain". It's also used for actions generated by controls. Fine. What I really would like to do is send a custom event "up the chain". The first responder to pick up on the event will handle it. This seems like a pretty common pattern, but I can't find any good explanation on how to do it the "iOS/Cocoa way". Since the responder chain is exactly what I need, I came up with a solution like this: // some event happened in my view that // I want to turn into a custom event and pass it "up": UIResponder *responder = [self nextResponder]; while (responder) { if ([responder conformsToProtocol:@protocol(ItemSelectedDelegate)]) { [responder itemSelected:someItem]; break; } responder = [responder nextResponder]; } This works perfectly, but I have a feeling that there should be other ways of handling this. Walking the chain manually this way doesn't seem very... nice. Note that notifications are not a good solution here, because I only want the objects in the view hierarchy to be involved, and notifications are global. What's the best way of handling this in iOS (and Cocoa for that matter)? EDIT : What do I want to accomplish? I have a view controller, which has a view, which has subviews etc... Several of the subviews are of a specific type that show an item from the database. When the user taps this view, a signal should be sent to the controller to navigate to a detail page of this item. The view that handles the tap is several levels below the main view in the view hierarchy. I have to tell the controller (or in some cases a specific subview "up the chain") that an item was selected. Listening to notifications would be an option, but I don't like that solution because selecting an item i
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