Remove gap between cell and navbar - ios

Question

I implemented ENSwiftSideMenu in my app, (you can just use the sample project it provided, because it has the same problem,) and when I rotate the iPhone to portrait mode, the menu tableView has a gap between the nav bar and the cells
I found the problem. It's at the following file: MyMenuTableViewController.swift
tableView.contentInset = UIEdgeInsetsMake(64.0, 0, 0, 0)
So I replaced the height of 64 with the height of the navbar:
override func viewDidLoad() {
super.viewDidLoad()
tableView.contentInset = UIEdgeInsetsMake(self.navigationController!.navigationBar.frame.height, 0, 0, 0) // Error
}
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
tableView.contentInset = UIEdgeInsetsMake(self.navigationController!.navigationBar.frame.height, 0, 0, 0)
}
When I run the app, I get the following error at the code in viewDidLoad:
fatal error: unexpectedly found nil while unwrapping an Optional value
That error before the first page loads (at the splash screen). What can I do to fix that? Or if there's a better way to remove the gap please let me know. I already tried adding the following in viewDidLoad:
self.automaticallyAdjustsScrollViewInsets = true
And that doesn't do anything.

Answer 1

Ok, I've been looking how ENSwiftSideMenu works. It looks like your side menu isn't added to the navigation stack, so if you call self.navigationController, it returns nil always.
Also, ENSwiftSideMenu uses a custom navigation controller: ENSideMenuNavigationController that have a property called sideMenu, which unfortunately, inherits from NSObject (not from UIViewController). So basically, what I had to do was to change MyNavigationController class so it holds a reference to the MyMenuTableViewController used as a side menu, and apply content insets to it's tableview based on the ENSideMenuNavigationController's navigation bar size.
Lastly, you need to apply side table view's contentInset after the rotation was made, so you need to observe UIDeviceOrientationDidChangeNotification notification.
This is how MyNavigationController class should be to work:
class MyNavigationController: ENSideMenuNavigationController, ENSideMenuDelegate {
private let menuTableViewController = MyMenuTableViewController()
override func viewDidLoad() {
super.viewDidLoad()
sideMenu = ENSideMenu(sourceView: self.view, menuViewController: menuTableViewController, menuPosition:.Left)
//sideMenu?.delegate = self //optional
sideMenu?.menuWidth = 180.0 // optional, default is 160
//sideMenu?.bouncingEnabled = false
// make navigation bar showing over side menu
view.bringSubviewToFront(navigationBar)
menuTableViewController.tableView.contentInset = UIEdgeInsetsMake(self.navigationBar.frame.height + self.navigationBar.frame.origin.y, 0, 0, 0)
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "rotated", name: UIDeviceOrientationDidChangeNotification, object: nil)
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIDeviceOrientationDidChangeNotification, object: nil)
}
func rotated() {
menuTableViewController.tableView.contentInset = UIEdgeInsetsMake(self.navigationBar.frame.height + self.navigationBar.frame.origin.y, 0, 0, 0)
}
// MARK: - ENSideMenu Delegate
func sideMenuWillOpen() {
println("sideMenuWillOpen")
}
func sideMenuWillClose() {
println("sideMenuWillClose")
}
func sideMenuDidClose() {
println("sideMenuDidClose")
}
func sideMenuDidOpen() {
println("sideMenuDidOpen")
}
}