From 9e22d5be83be5830c5f12a24bfc03b1c47896b2e Mon Sep 17 00:00:00 2001
From: rsbittorf <rsbittorf@gmail.com>
Date: Wed, 29 Jan 2020 11:17:43 -0800
Subject: [PATCH] Add move to page functionality

---
 .../Classes/Card Parts/CardPartPagedView.swift  | 17 +++++++++++++++++
 .../CardPartPagedViewCardController.swift       | 17 ++++++++++++++---
 README.md                                       |  6 ++++++
 3 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/CardParts/src/Classes/Card Parts/CardPartPagedView.swift b/CardParts/src/Classes/Card Parts/CardPartPagedView.swift
index 3a6e6640..54b6e53c 100644
--- a/CardParts/src/Classes/Card Parts/CardPartPagedView.swift	
+++ b/CardParts/src/Classes/Card Parts/CardPartPagedView.swift	
@@ -90,6 +90,23 @@ public class CardPartPagedView: UIView, CardPartView {
 		
 		super.updateConstraints()
 	}
+    
+    public func moveToPage(_ page: Int) {
+        guard page <= pageControl.numberOfPages - 1 else { return }
+
+        UIView.animate(withDuration: 1.0) {[weak self] in
+            
+            guard let this = self else { return }
+
+            let currentOffset = this.scrollView.contentOffset
+            this.scrollView.contentOffset = CGPoint(x: this.getPosition(for: page), y: currentOffset.y)
+            this.pageControl.currentPage = page
+        }
+    }
+    
+    private func getPosition(for page: Int) -> CGFloat {
+        return self.scrollView.frame.size.width * CGFloat(integerLiteral: page)
+    }
 	
 	fileprivate func updatePageControl() {
 
diff --git a/Example/CardParts/CardPartPagedViewCardController.swift b/Example/CardParts/CardPartPagedViewCardController.swift
index 1fae6a6a..9204798b 100644
--- a/Example/CardParts/CardPartPagedViewCardController.swift
+++ b/Example/CardParts/CardPartPagedViewCardController.swift
@@ -11,6 +11,9 @@ import CardParts
 
 class CardPartPagedViewCardController: CardPartsViewController {
     
+    private var currentPage = 0
+    private var timer: Timer?
+    
     let cardPartTextView = CardPartTextView(type: .normal)
     let emojis: [String] = ["😎", "🤪", "🤩", "👻", "🤟🏽", "💋", "💃🏽"]
     
@@ -21,7 +24,7 @@ class CardPartPagedViewCardController: CardPartsViewController {
         
         var stackViews: [CardPartStackView] = []
         
-        for i in 0...10 {
+        for (index, emojiString) in emojis.enumerated() {
             
             let sv = CardPartStackView()
             sv.axis = .vertical
@@ -29,18 +32,26 @@ class CardPartPagedViewCardController: CardPartsViewController {
             stackViews.append(sv)
             
             let title = CardPartTextView(type: .normal)
-            title.text = "This is page #\(i)"
+            title.text = "This is page #\(index)"
             title.textAlignment = .center
             sv.addArrangedSubview(title)
             
             let emoji = CardPartTextView(type: .normal)
-            emoji.text = self.emojis[Int(arc4random_uniform(UInt32(self.emojis.count)))]
+            emoji.text = emojiString
             emoji.textAlignment = .center
             sv.addArrangedSubview(emoji)
         }
         
         let cardPartPagedView = CardPartPagedView(withPages: stackViews, andHeight: 200)
         
+        // To animate through the pages
+        timer = Timer.scheduledTimer(withTimeInterval: 3, repeats: true, block: {[weak self] (_) in
+            
+            guard let this = self else { return }
+            this.currentPage = this.currentPage == this.emojis.count - 1 ? 0 : this.currentPage + 1
+            cardPartPagedView.moveToPage(this.currentPage)
+        })
+        
         setupCardParts([cardPartTextView, cardPartPagedView])
     }
 }
diff --git a/README.md b/README.md
index b419e3e9..379f448d 100644
--- a/README.md
+++ b/README.md
@@ -892,6 +892,12 @@ func didMoveToPage(page: Int)
 
 Which will fire whenever the user swipes to another page
 
+You also have the abililty to automatically move to a specific page by calling the following function on `CardPartPagedView`
+
+```swift
+func moveToPage(_ page: Int)
+```
+
 #### `CardPartSliderView`
 
 You can set min and max value as well as bind to the current set amount: