Fixing multi-line title, image reduction, Objective-C compatibility, font configuration, and padding. Added support for "next" button instead of "skip", as well. Adding delegate callback for providing access to content view controllers when displayed/redisplayed.

.gitignore

@@ -0,0 +1 @@
+.DS_Store

AlertOnboarding/AlertChildPageViewController.swift

@@ -8,19 +8,19 @@
 
 import UIKit
 
-class AlertChildPageViewController: UIViewController {
+@objc public class AlertChildPageViewController: UIViewController {
 
-    var pageIndex: Int!
+    internal(set) var pageIndex: Int!
 
-    @IBOutlet weak var image: UIImageView!
-    @IBOutlet weak var labelMainTitle: UILabel!
-    @IBOutlet weak var labelDescription: UILabel!
+    @objc @IBOutlet public private(set) weak var image: UIImageView!
+    @objc @IBOutlet public private(set) weak var labelMainTitle: UILabel!
+    @objc @IBOutlet public private(set) weak var labelDescription: UILabel!
 
-    override func viewDidLoad() {
+    override public func viewDidLoad() {
         super.viewDidLoad()
     }
 
-    override func didReceiveMemoryWarning() {
+    override public func didReceiveMemoryWarning() {
         super.didReceiveMemoryWarning()
     }
 }

AlertOnboarding/AlertChildPageViewController.xib

@@ -22,13 +22,13 @@
                     <view contentMode="scaleToFill" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="ozM-3f-JWg" userLabel="View 2:2">
                         <frame key="frameInset" minY="314" width="600" height="286"/>
                         <subviews>
-                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" text="CHOOSE THE PLANET" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="64e-Bi-ts0">
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" text="CHOOSE THE PLANET" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="64e-Bi-ts0">
                                 <frame key="frameInset" minX="8" minY="8" width="584" height="57"/>
                                 <fontDescription key="fontDescription" name="Avenir-Heavy" family="Avenir" pointSize="17"/>
                                 <color key="textColor" red="0.6705882353" green="0.69411764710000001" blue="0.76862745099999996" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="5" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="eh1-05-M15">
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="eh1-05-M15">
                                 <frame key="frameInset" minX="8" minY="92" width="584" height="21"/>
                                 <string key="text">Lorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsumLorem ipsum</string>
                                 <fontDescription key="fontDescription" name="Avenir-Book" family="Avenir" pointSize="13"/>
@@ -37,12 +37,12 @@
                             </label>
                         </subviews>
                         <constraints>
-                            <constraint firstItem="64e-Bi-ts0" firstAttribute="leading" secondItem="ozM-3f-JWg" secondAttribute="leading" constant="10" id="9bY-Oy-RjP"/>
-                            <constraint firstAttribute="trailing" secondItem="eh1-05-M15" secondAttribute="trailing" constant="10" id="D32-SW-K7R"/>
+                            <constraint firstItem="64e-Bi-ts0" firstAttribute="leading" secondItem="ozM-3f-JWg" secondAttribute="leading" constant="14" id="9bY-Oy-RjP"/>
+                            <constraint firstAttribute="trailing" secondItem="eh1-05-M15" secondAttribute="trailing" constant="14" id="D32-SW-K7R"/>
                             <constraint firstItem="eh1-05-M15" firstAttribute="top" secondItem="64e-Bi-ts0" secondAttribute="bottom" constant="10" id="cpQ-i1-7gA"/>
-                            <constraint firstAttribute="trailing" secondItem="64e-Bi-ts0" secondAttribute="trailing" constant="10" id="fTP-Ao-j9O"/>
+                            <constraint firstAttribute="trailing" secondItem="64e-Bi-ts0" secondAttribute="trailing" constant="14" id="fTP-Ao-j9O"/>
                             <constraint firstItem="eh1-05-M15" firstAttribute="centerX" secondItem="ozM-3f-JWg" secondAttribute="centerX" id="mFw-fv-u7r"/>
-                            <constraint firstItem="eh1-05-M15" firstAttribute="leading" secondItem="ozM-3f-JWg" secondAttribute="leading" constant="10" id="put-D4-Yuc"/>
+                            <constraint firstItem="eh1-05-M15" firstAttribute="leading" secondItem="ozM-3f-JWg" secondAttribute="leading" constant="14" id="put-D4-Yuc"/>
                             <constraint firstItem="64e-Bi-ts0" firstAttribute="top" secondItem="ozM-3f-JWg" secondAttribute="top" constant="10" id="rib-H8-35l"/>
                         </constraints>
                     </view>

AlertOnboarding/AlertOnboarding.swift

@@ -8,10 +8,12 @@
 
 import UIKit
 
-public protocol AlertOnboardingDelegate {
+@objc public protocol AlertOnboardingDelegate {
     func alertOnboardingSkipped(_ currentStep: Int, maxStep: Int)
     func alertOnboardingCompleted()
     func alertOnboardingNext(_ nextStep: Int)
+
+    @objc optional func alertOnboardingDidDisplayStep(alertOnboarding: AlertOnboarding, alertChildPageViewController: AlertChildPageViewController, step: Int)
 }
 
 open class AlertOnboarding: UIView, AlertPageViewDelegate {
@@ -28,30 +30,37 @@ open class AlertOnboarding: UIView, AlertPageViewDelegate {
 
 
     //PUBLIC VARS   ------------------------
-    open var colorForAlertViewBackground: UIColor = UIColor.white
+    @objc open var colorForAlertViewBackground: UIColor = UIColor.white
+
+    @objc open var colorButtonBottomBackground: UIColor = UIColor(red: 226/255, green: 237/255, blue: 248/255, alpha: 1.0)
+    @objc open var colorButtonText: UIColor = UIColor(red: 118/255, green: 125/255, blue: 152/255, alpha: 1.0)
 
-    open var colorButtonBottomBackground: UIColor = UIColor(red: 226/255, green: 237/255, blue: 248/255, alpha: 1.0)
-    open var colorButtonText: UIColor = UIColor(red: 118/255, green: 125/255, blue: 152/255, alpha: 1.0)
+    @objc open var colorTitleLabel: UIColor = UIColor(red: 171/255, green: 177/255, blue: 196/255, alpha: 1.0)
+    @objc open var colorDescriptionLabel: UIColor = UIColor(red: 171/255, green: 177/255, blue: 196/255, alpha: 1.0)
 
-    open var colorTitleLabel: UIColor = UIColor(red: 171/255, green: 177/255, blue: 196/255, alpha: 1.0)
-    open var colorDescriptionLabel: UIColor = UIColor(red: 171/255, green: 177/255, blue: 196/255, alpha: 1.0)
+    @objc open var fontTitleLabel: UIFont? = UIFont(name: "Avenir-Heavy", size: 17);
+    @objc open var fontDescriptionLabel: UIFont? = UIFont(name: "Avenir-Book", size: 13);
+    @objc open var fontButtonText: UIFont? = UIFont(name: "Avenir-Black", size: 15);
 
-    open var colorPageIndicator = UIColor(red: 171/255, green: 177/255, blue: 196/255, alpha: 1.0)
-    open var colorCurrentPageIndicator = UIColor(red: 118/255, green: 125/255, blue: 152/255, alpha: 1.0)
+    @objc open var colorPageIndicator = UIColor(red: 171/255, green: 177/255, blue: 196/255, alpha: 1.0)
+    @objc open var colorCurrentPageIndicator = UIColor(red: 118/255, green: 125/255, blue: 152/255, alpha: 1.0)
 
     open var heightForAlertView: CGFloat!
     open var widthForAlertView: CGFloat!
 
-    open var percentageRatioHeight: CGFloat = 0.8
-    open var percentageRatioWidth: CGFloat = 0.8
+    @objc open var percentageRatioHeight: CGFloat = 0.8
+    @objc open var percentageRatioWidth: CGFloat = 0.8
+
+    @objc open var nextInsteadOfSkip = false
 
-    open var titleSkipButton = "SKIP"
-    open var titleGotItButton = "GOT IT !"
+    @objc open var titleNextButton = "NEXT"
+    @objc open var titleSkipButton = "SKIP"
+    @objc open var titleGotItButton = "GOT IT !"
 
-    open var delegate: AlertOnboardingDelegate?
+    @objc open var delegate: AlertOnboardingDelegate?
 
 
-    public init (arrayOfImage: [String], arrayOfTitle: [String], arrayOfDescription: [String]) {
+    @objc public init (arrayOfImage: [String], arrayOfTitle: [String], arrayOfDescription: [String]) {
         super.init(frame: CGRect(x: 0,y: 0,width: 0,height: 0))
         self.configure(arrayOfImage, arrayOfTitle: arrayOfTitle, arrayOfDescription: arrayOfDescription)
         self.arrayOfImage = arrayOfImage
@@ -77,7 +86,7 @@ open class AlertOnboarding: UIView, AlertPageViewDelegate {
     // MARK: PUBLIC FUNCTIONS    --------------------------------------------------------------
     //-----------------------------------------------------------------------------------------
 
-    open func show() {
+    @objc open func show() {
 
         //Update Color
         self.buttonBottom.backgroundColor = colorButtonBottomBackground
@@ -106,7 +115,7 @@ open class AlertOnboarding: UIView, AlertPageViewDelegate {
     }
 
     //Hide onboarding with animation
-    open func hide(){
+    @objc open func hide(){
         self.checkIfOnboardingWasSkipped()
         DispatchQueue.main.async { () -> Void in
             self.animateForEnding()
@@ -134,7 +143,7 @@ open class AlertOnboarding: UIView, AlertPageViewDelegate {
     fileprivate func configure(_ arrayOfImage: [String], arrayOfTitle: [String], arrayOfDescription: [String]) {
 
         self.buttonBottom = UIButton(frame: CGRect(x: 0,y: 0, width: 0, height: 0))
-        self.buttonBottom.titleLabel?.font = UIFont(name: "Avenir-Black", size: 15)
+        self.buttonBottom.titleLabel?.font = fontButtonText
         self.buttonBottom.addTarget(self, action: #selector(AlertOnboarding.onClick), for: .touchUpInside)
 
         self.background = UIView(frame: CGRect(x: 0,y: 0, width: 0, height: 0))
@@ -218,6 +227,16 @@ open class AlertOnboarding: UIView, AlertPageViewDelegate {
     //MARK: BUTTON ACTIONS ---------------------------------
 
     @objc func onClick(){
+        if (nextInsteadOfSkip) {
+            if let viewController = self.container.viewControllerAtIndex((self.container.pageController.viewControllers?[0] as! AlertChildPageViewController).pageIndex!-1)
+            {
+                self.container.pageController.setViewControllers([viewController], direction: UIPageViewControllerNavigationDirection.forward, animated: true, completion: nil)
+                self.container.didMoveToPageIndex(pageIndex: (viewController as! AlertChildPageViewController).pageIndex)
+
+                return;
+            }
+        }
+
         self.hide()
     }
 

AlertOnboarding/AlertPageViewController.swift

@@ -47,6 +47,10 @@ class AlertPageViewController: UIViewController, UIPageViewControllerDataSource,
     override func viewDidLoad() {
         super.viewDidLoad()
 
+        if (alertview.nextInsteadOfSkip) {
+            self.alertview.buttonBottom.setTitle(alertview.titleNextButton, for: UIControlState())
+        }
+
         self.configurePageViewController()
         self.configurePageControl()
 
@@ -95,6 +99,9 @@ class AlertPageViewController: UIViewController, UIPageViewControllerDataSource,
 
 
     func viewControllerAtIndex(_ index : Int) -> UIViewController? {
+        if (index<0 || index>=arrayOfImage.count) {
+            return nil;
+        }
 
         var pageContentViewController: AlertChildPageViewController!
         let podBundle = Bundle(for: self.classForCoder)
@@ -116,18 +123,23 @@ class AlertPageViewController: UIViewController, UIPageViewControllerDataSource,
         let realIndex = arrayOfImage.count - index - 1
 
         pageContentViewController.image.image = UIImage(named: arrayOfImage[realIndex])
+        pageContentViewController.image.layer.minificationFilter=kCAFilterTrilinear
+        pageContentViewController.labelMainTitle.font = alertview.fontTitleLabel
         pageContentViewController.labelMainTitle.text = arrayOfTitle[realIndex]
         pageContentViewController.labelMainTitle.textColor = alertview.colorTitleLabel
+        pageContentViewController.labelDescription.font = alertview.fontDescriptionLabel
         pageContentViewController.labelDescription.text = arrayOfDescription[realIndex]
         pageContentViewController.labelDescription.textColor = alertview.colorDescriptionLabel
 
         return pageContentViewController
     }
 
     func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
-        let pageContentViewController = pageViewController.viewControllers![0] as! AlertChildPageViewController
-        let index = pageContentViewController.pageIndex
-        self.currentStep = (arrayOfImage.count - index! - 1)
+        didMoveToPageIndex(pageIndex: (pageViewController.viewControllers![0] as! AlertChildPageViewController).pageIndex)
+    }
+
+    func didMoveToPageIndex(pageIndex: Int) {
+        self.currentStep = (arrayOfImage.count - pageIndex - 1)
         self.delegate?.nextStep(self.currentStep)
         //Check if user watching the last step
         if currentStep == arrayOfImage.count - 1 {
@@ -138,13 +150,21 @@ class AlertPageViewController: UIViewController, UIPageViewControllerDataSource,
             self.maxStep = currentStep
         }
         if pageControl != nil {
-            pageControl.currentPage = arrayOfImage.count - index! - 1
+            pageControl.currentPage = arrayOfImage.count - pageIndex - 1
             if pageControl.currentPage == arrayOfImage.count - 1 {
                 self.alertview.buttonBottom.setTitle(alertview.titleGotItButton, for: UIControlState())
+            } else if (alertview.nextInsteadOfSkip) {
+                self.alertview.buttonBottom.setTitle(alertview.titleNextButton, for: UIControlState())
             } else {
                 self.alertview.buttonBottom.setTitle(alertview.titleSkipButton, for: UIControlState())
             }
         }
+
+        if self.alertview.delegate?.alertOnboardingDidDisplayStep != nil {
+            (self.alertview.delegate?.alertOnboardingDidDisplayStep)!(self.alertview, (self.pageController.viewControllers?.first)! as! AlertChildPageViewController, self.currentStep)
+
+        }
+
     }
 
 
@@ -189,6 +209,8 @@ class AlertPageViewController: UIViewController, UIPageViewControllerDataSource,
         self.viewControllers = [initialViewController!]
         self.pageController.setViewControllers(viewControllers, direction: .forward, animated: false, completion: nil)
 
+        didMoveToPageIndex(pageIndex: arrayOfImage.count-1)
+
         self.addChildViewController(self.pageController)
     }