Need help with XLPagerTabStrip?
Click the “chat” button below for chat support from the developer who created it, or find similar developers for support.

About the developer

6.6K Stars 1.2K Forks MIT License 317 Commits 305 Opened issues


Android PagerTabStrip for iOS.

Services available


Need anything else?

Contributors list


Build status Platform iOS Swift 5 compatible Carthage compatible CocoaPods compatible License: MIT

Made with ❤️ by XMARTLABS.

Android PagerTabStrip for iOS!

👉 Looking for a SwiftUI version? Check out PagerTabStripView, it's fully written in pure SwiftUI. 👈

XLPagerTabStrip is a Container View Controller that allows us to switch easily among a collection of view controllers. Pan gesture can be used to move on to next or previous view controller. It shows a interactive indicator of the current, previous, next child view controllers.

Getting involved

  • If you want to contribute please feel free to submit pull requests.
  • If you have a feature request please open an issue.
  • If you found a bug or need help please check older issues, FAQ and threads on StackOverflow (Tag 'XLPagerTabStrip') before submitting an issue.

Before contribute check the CONTRIBUTING file for more info.

If you use XLPagerTabStrip in your app we would love to hear about it! Drop us a line on twitter.

Pager Types

The library provides 4 different ways to show the view controllers.

Button Bar

This is likely the most common pager type. It's used by many well-known apps such as instagram, youtube, skype, and many others.


This mode doesn't show a title neither an image. It only shows a bar that indicates the current view controller.


A long time ago, the twitter app made use of this type of pager in the app main screen.


This mode uses a

to indicate which view controller is being displayed.


Basically, we just need to provide the list of child view controllers to show, and these view controllers should provide the information (title or image) that will be shown in the associated indicator.

Let's see the steps to do this:

Choose which type of pager we want to create

First, we must choose the type of pager we want to create. Depending on our choice, we will have to create a view controller that extends from one of the following controllers:


All these built-in pager controllers extend from the base class

. You can also make your custom pager controller by extending directly from
in the event that no pager menu type fits your needs.
import XLPagerTabStrip

class MyPagerTabStripName: ButtonBarPagerTabStripViewController { .. }

Connect outlets and add layout constraints

We strongly recommend using IB to set up our page controller views.

Drag a

into the storyboard and set up its class with your pager controller (
). Drag a
into your view controller view and connect
outlet with the scroll view.

Depending on which type of paging view controller you are working with you may have to connect more outlets.


, we should connect
outlet. barView type is UIView.
requires us to connect
type is
which extends from
has a
outlet; if the outlet is not connected the library try to set up the navigationItem
property using a
doesn't require us to connect any additional outlet.

The example project contains a example for each pager controller type and we can look into it to see how views were added and how outlets were connected.

Provide the view controllers that will appear embedded into the PagerTabStrip view controller

You can provide the view controllers by overriding

func viewControllers(for: pagerTabStripController: PagerTabStripViewController) -> [UIViewController]
override public func viewControllers(for pagerTabStripController: PagerTabStripViewController) -> [UIViewController] {
  return [MyEmbeddedViewController(), MySecondEmbeddedViewController()]

The method above is the only method declared in

protocol. We don't need to explicitly conform to it since base pager class already does it.
Provide information to show in each indicator

Every UIViewController that will appear within the PagerTabStrip needs to provide either a title or an image. In order to do so they should conform to

by implementing
func indicatorInfo(for pagerTabStripController: PagerTabStripViewController) -> IndicatorInfo
which provides the information required to show the PagerTabStrip menu (indicator) associated with the view controller.
class MyEmbeddedViewController: UITableViewController, IndicatorInfoProvider {

func indicatorInfo(for pagerTabStripController: PagerTabStripViewController) -> IndicatorInfo { return IndicatorInfo(title: "My Child title") } }

For a detailed step-by-step guide about how to use the library, please check out this community blog post.

That's it! We're done! 🍻🍻


Pager Behaviour

The pager indicator can be updated progressive as we swipe or at once in the middle of the transition between the view controllers. By setting up

property we can choose how the indicator should be updated.
public var pagerBehaviour: PagerTabStripBehaviour
public enum PagerTabStripBehaviour {
    case common(skipIntermediteViewControllers: Bool)
    case progressive(skipIntermediteViewControllers: Bool, elasticIndicatorLimit: Bool)

Default Values:

// Twitter Type
PagerTabStripBehaviour.common(skipIntermediateViewControllers: true)
// Segmented Type
PagerTabStripBehaviour.common(skipIntermediateViewControllers: true)
// Bar Type true, elasticIndicatorLimit: true)
// ButtonBar Type true, elasticIndicatorLimit: true)

As you might have noticed,

enumeration cases have
associated values.

allows us to skip intermediate view controllers when a tab indicator is tapped.

allows us to tension the indicator when we reach a limit, I mean when we try to move forward from last indicator or move back from first indicator.
PagerTabStripDelegate & PagerTabStripIsProgressiveDelegate

Normally we don't need to implement these protocols because each pager type already conforms to it in order to properly update its indicator. However, there may be some scenarios when overriding a method may come in handy.

public protocol PagerTabStripDelegate: class {

func updateIndicator(for viewController: PagerTabStripViewController, fromIndex: Int, toIndex: Int)


public protocol PagerTabStripIsProgressiveDelegate : PagerTabStripDelegate {

func updateIndicator(for viewController: PagerTabStripViewController, fromIndex: Int, toIndex: Int, withProgressPercentage progressPercentage: CGFloat, indexWasChanged: Bool)


Again, the method invoked by the library depends on the


ButtonBar Customization UIColor?
// buttonBar minimumInteritemSpacing value, note that button bar extends from UICollectionView CGFloat?
// buttonBar minimumLineSpacing value CGFloat?
// buttonBar flow layout left content inset value CGFloat?
// buttonBar flow layout right content inset value CGFloat?

// selected bar view is created programmatically so it's important to set up the following 2 properties properly = CGFloat = 5

// each buttonBar item is a UICollectionView cell of type ButtonBarViewCell UIColor? = UIFont.systemFont(ofSize: 18) // helps to determine the cell width, it represent the space before and after the title label CGFloat = 8 UIColor? // in case the barView items do not fill the screen width this property stretch the cells to fill the screen = true // only used if button bar is created programmatically and not using storyboards or nib files as recommended. public var buttonBarHeight: CGFloat?

Important: Settings should be called before

is called. ```swift override func viewDidLoad() { = 2 = UIColor.white

super.viewDidLoad() } ```

Update cells when selected indicator changes

We may need to update the indicator cell when the displayed view controller changes. The following function properties help to accomplish that. Depending on our pager

value we will have to set up
public var changeCurrentIndex: ((oldCell: ButtonBarViewCell?, newCell: ButtonBarViewCell?, animated: Bool) -> Void)?
public var changeCurrentIndexProgressive: ((oldCell: ButtonBarViewCell?, newCell: ButtonBarViewCell?, progressPercentage: CGFloat, changeCurrentIndex: Bool, animated: Bool) -> Void)?

Let's see an example:

changeCurrentIndexProgressive = { (oldCell: ButtonBarViewCell?, newCell: ButtonBarViewCell?, progressPercentage: CGFloat, changeCurrentIndex: Bool, animated: Bool) -> Void in
    guard changeCurrentIndex == true else { return }

oldCell?.label.textColor = UIColor(white: 1, alpha: 0.6)
newCell?.label.textColor = UIColor.white

if animated {
    UIView.animate(withDuration: 0.1, animations: { () -> Void in
        newCell?.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
        oldCell?.transform = CGAffineTransform(scaleX: 0.8, y: 0.8)
else {
    newCell?.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
    oldCell?.transform = CGAffineTransform(scaleX: 0.8, y: 0.8)


Bar Type Customization UIColor? UIColor?
// barHeight is only set up when the bar is created programmatically and not using storyboards or xib files as recommended. CGFloat = 5

Twitter Type Customization = UIColor(white: 1, alpha: 0.4) = UIColor.white = UIFont.systemFont(ofSize: 18) = UIFont.systemFont(ofSize: 15) = UIColor.white

Segmented Type Customization UIColor?


  • iOS 9.3+
  • Xcode 10.2+


Follow these 3 steps to run Example project: Clone XLPagerTabStrip repository, open XLPagerTabStrip workspace and run the Example project.



CocoaPods is a dependency manager for Cocoa projects.

To install XLPagerTabStrip, simply add the following line to your Podfile:

pod 'XLPagerTabStrip', '~> 9.0'


Carthage is a simple, decentralized dependency manager for Cocoa.

To install XLPagerTabStrip, simply add the following line to your Cartfile:

github "xmartlabs/XLPagerTabStrip" ~> 9.0


How to change the visible child view controller programmatically

provides the following methods to programmatically change the visible child view controller:
func moveToViewController(at index: Int)
func moveToViewController(at index: Int, animated: Bool)
func moveTo(viewController: UIViewController)
func moveTo(viewController: UIViewController, animated: Bool)

How to migrate from Swift 2 to Swift 3

Check out our migration guide


Change Log

This can be found in the file.

We use cookies. If you continue to browse the site, you agree to the use of cookies. For more information on our use of cookies please see our Privacy Policy.