Custom UIBarButtonItem in UISplitViewController doesn't respond to clicks (iPhone) - ios

Question

I'm trying to customize the appearance of a UIBarButtonItem on a UISplitViewController divided into two UINavigationController's (the detail and master views), but keep hitting a brick wall. I first followed the advice here, but have been unable to achieve the desired results.
If if I implement the back button in the viewDidLoad method of my Detail View Controller in this way:
if let svc = splitViewController {
navigationItem.leftBarButtonItem = svc.displayModeButtonItem()
}
I get the default 'Back' button that navigates back to Master View controller. But if I try to customize the button using the following code:
if let svc = splitViewController {
let searchButton = UIBarButtonItem(
image: UIImage(named: "magnifying-glass"),
style: UIBarButtonItemStyle.Plain,
target: svc.displayModeButtonItem().target,
action: svc.displayModeButtonItem().action
)
navigationItem.leftBarButtonItem = searchButton
}
I get the desired icon in the navbar but it does nothing when clicked. I've debugged the action and target in the console and for both the action is "_triggerDisplayModeAction:" and the controller is an instance of the UISplitViewController.
Any ideas on what's going on here?

Answer 1

i suggest you to create and use your custom UIBarButtonItem in prepareForSeque in master view controller. split view controller by default will create new instance of your detail view controller!!! ignore the part with iPhone ios7support, that is another story :-) https://github.com/op183/MasterDetailDemo
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showDetail" {
if let indexPath = self.tableView.indexPathForSelectedRow() {
let object = objects[indexPath.row] as String
if let navController = (segue.destinationViewController as? UINavigationController) {
let controller = navController.topViewController as DetailViewController
controller.detailItem = object
let defaultBarButton = splitViewController?.displayModeButtonItem()
let searchButton = UIBarButtonItem(
image: UIImage(named: "magnifying-glass"),
style: UIBarButtonItemStyle.Plain,
target: defaultBarButton.target,
action: defaultBarButton.action
)
controller.navigationItem.leftBarButtonItem = searchButton
controller.navigationItem.leftItemsSupplementBackButton = true
} else {
// iPhone ios7support
(segue.destinationViewController as DetailViewController).detailItem = object
}
}
}
}