Added scrolling to a specific item

Author: MaherKSantina

Example/MSPeekCollectionViewDelegateImplementation/Base.lproj/Main.storyboard

@@ -1,11 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14109" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="HLk-Dk-Q2u">
-    <device id="retina4_7" orientation="portrait">
-        <adaptation id="fullscreen"/>
-    </device>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15505" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="HLk-Dk-Q2u">
+    <device id="retina4_7" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14088"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15510"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -22,7 +20,7 @@
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                         <subviews>
                             <collectionView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" dataMode="prototypes" translatesAutoresizingMaskIntoConstraints="NO" id="LPX-Xy-ffX">
-                                <rect key="frame" x="0.0" y="88" width="375" height="200"/>
+                                <rect key="frame" x="0.0" y="68" width="375" height="200"/>
                                 <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                                 <constraints>
                                     <constraint firstAttribute="height" constant="200" id="mPI-O6-6Yu"/>
@@ -45,15 +43,15 @@
                                 </cells>
                             </collectionView>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="SqK-AS-fCp">
-                                <rect key="frame" x="0.0" y="312" width="375" height="355"/>
+                                <rect key="frame" x="0.0" y="292" width="375" height="375"/>
                                 <subviews>
                                     <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="PhW-LY-2UV">
                                         <rect key="frame" x="0.0" y="0.0" width="375" height="46"/>
                                         <subviews>
                                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="SOE-YZ-ngU">
                                                 <rect key="frame" x="16" y="8" width="343" height="30"/>
                                                 <subviews>
-                                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" minValue="0.0" maxValue="100" translatesAutoresizingMaskIntoConstraints="NO" id="HGB-Vl-6y1" customClass="CustomSlider" customModule="MSPeekCollectionViewDelegateImplementation_Example" customModuleProvider="target">
+                                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="20" minValue="0.0" maxValue="100" translatesAutoresizingMaskIntoConstraints="NO" id="HGB-Vl-6y1" customClass="CustomSlider" customModule="MSPeekCollectionViewDelegateImplementation_Example" customModuleProvider="target">
                                                         <rect key="frame" x="191" y="0.0" width="154" height="31"/>
                                                         <constraints>
                                                             <constraint firstAttribute="width" constant="150" id="VgY-Sb-nMy"/>
@@ -95,7 +93,7 @@
                                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="2oh-g2-WZ8">
                                                 <rect key="frame" x="16" y="8" width="343" height="30"/>
                                                 <subviews>
-                                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" minValue="0.0" maxValue="100" translatesAutoresizingMaskIntoConstraints="NO" id="jow-9B-5z4" customClass="CustomSlider" customModule="MSPeekCollectionViewDelegateImplementation_Example" customModuleProvider="target">
+                                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="20" minValue="0.0" maxValue="100" translatesAutoresizingMaskIntoConstraints="NO" id="jow-9B-5z4" customClass="CustomSlider" customModule="MSPeekCollectionViewDelegateImplementation_Example" customModuleProvider="target">
                                                         <rect key="frame" x="191" y="0.0" width="154" height="31"/>
                                                         <constraints>
                                                             <constraint firstAttribute="width" constant="150" id="N6Q-qa-K5J"/>
@@ -315,7 +313,7 @@
                 <navigationController automaticallyAdjustsScrollViewInsets="NO" id="HLk-Dk-Q2u" sceneMemberID="viewController">
                     <toolbarItems/>
                     <navigationBar key="navigationBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="oae-6G-97C">
-                        <rect key="frame" x="0.0" y="20" width="375" height="44"/>
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="44"/>
                         <autoresizingMask key="autoresizingMask"/>
                     </navigationBar>
                     <nil name="viewControllers"/>

Example/Podfile.lock

@@ -1,5 +1,5 @@
 PODS:
-  - MSPeekCollectionViewDelegateImplementation (3.0.0)
+  - MSPeekCollectionViewDelegateImplementation (3.0.1)
 
 DEPENDENCIES:
   - MSPeekCollectionViewDelegateImplementation (from `../`)
@@ -9,7 +9,7 @@ EXTERNAL SOURCES:
     :path: "../"
 
 SPEC CHECKSUMS:
-  MSPeekCollectionViewDelegateImplementation: e1c53a3d70dc37850d529f9fc9b07c29767fccf7
+  MSPeekCollectionViewDelegateImplementation: fdb8ae5c41baaad0962f489b7fa78a653037cc17
 
 PODFILE CHECKSUM: 8d230cee08c8a8b7e62859eff8016277efe2311d
 

Example/Pods/Local Podspecs/MSPeekCollectionViewDelegateImplementation.podspec.json

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'MSPeekCollectionViewDelegateImplementation'
-  s.version          = '3.0.0'
+  s.version          = '3.0.1'
   s.summary          = 'A custom paging behavior that peeks the previous and next items in a collection view'
   s.swift_version    = '5.0'
 

Example/Pods/Manifest.lock

@@ -63,6 +63,11 @@ public class MSCollectionViewPeekingBehavior {
         paging.dataSource = self
     }
 
+    /// Scrolls to an item at a specific index with or without animation
+    public func scrollToItem(at index: Int, animated: Bool) {
+        layout.collectionView?.setContentOffset(layout.startingPointForItem(index: index), animated: animated)
+    }
+
     /// Required function to be called when the `scrollViewWillEndDragging` `UICollectionViewDelegate` function is called
     public func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
         paging.collectionViewWillEndDragging(scrollDirection: scrollDirection, withVelocity: velocity, targetContentOffset: targetContentOffset)

Example/Pods/Target Support Files/MSPeekCollectionViewDelegateImplementation/MSPeekCollectionViewDelegateImplementation-Info.plist

@@ -184,6 +184,18 @@ extension ViewController: UICollectionViewDelegate {
 }
 ```
 
+## Features
+### Scrolling to a specific item
+The `MSCollectionViewPeekingBehavior` now has a function to scroll to a specific index
+```swift
+public func scrollToItem(at index: Int, animated: Bool)
+```
+
+You can do something like:
+```swift
+behavior.scrollToItem(at: 1, animated: true)
+```
+
 ## Customization
 ### Vertical Scroll Direction
 The implementation supports collection views with vertical directions and will automatically position cells correctly, you can set the scrolling and peeking to be vertical using: