Get search bar in navigation bar in Swift

Try this

let leftNavBarButton = UIBarButtonItem(customView:Yoursearchbar)  self.navigationItem.leftBarButtonItem = leftNavBarButton

Update

You keep a lazy UISearchBar property

lazy   var searchBar:UISearchBar = UISearchBar(frame: CGRectMake(0, 0, 200, 20))

In viewDidLoad

searchBar.placeholder = "Your placeholder"var leftNavBarButton = UIBarButtonItem(customView:searchBar)self.navigationItem.leftBarButtonItem = leftNavBarButton

If you want to use storyboardjust drag your searchbar as a outlet,then replace the lazy property with your outlet searchbar

    // create the search bar programatically since you won't be    // able to drag one onto the navigation bar    searchBar = UISearchBar()    searchBar.sizeToFit()    // the UIViewController comes with a navigationItem property    // this will automatically be initialized for you if when the    // view controller is added to a navigation controller's stack    // you just need to set the titleView to be the search bar    navigationItem.titleView = searchBar

In your view controller:

lazy var searchBar = UISearchBar(frame: CGRectZero)override func viewDidLoad() {    super.viewDidLoad()    searchBar.placeholder = "Search"    navigationItem.titleView = searchBar}

Doing it this way, by setting the navigationItem.titleView, the search bar is automatically centered across the iPhone and iPad devices. Note: only tested with v8.4 and v9.0

for SWIFT 3

lazy var searchBar = UISearchBar(frame: CGRect.zero)