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Add pager view visibleCells property #106

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Add pager view visibleCells property #106

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f9c1774
Add pager view visibleCells property
satishVekariya Jan 9, 2018
3380bbb
Add Support for single item scrolling interaction
cp-satish-v May 3, 2018
123caa6
Merge remote-tracking branch 'refs/remotes/wenchao/master'
cp-satish-v Oct 8, 2018
61034e6
Merge remote-tracking branch 'refs/remotes/wenchao/master'
cp-satish-v Aug 14, 2019
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8 changes: 8 additions & 0 deletions FSPagerViewExamples.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>IDEDidComputeMac32BitWarning</key>
<true/>
</dict>
</plist>
24 changes: 24 additions & 0 deletions Sources/FSPagerView.swift
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Expand Up @@ -214,6 +214,14 @@ open class FSPagerView: UIView,UICollectionViewDataSource,UICollectionViewDelega
return self.collectionView.panGestureRecognizer
}

/// Returns an array of visible cells currently displayed by the pager view.
open var visibleCells: [FSPagerViewCell] {
return self.collectionView.visibleCells as! [FSPagerViewCell]
}

/// To disable or enable multi scrolling interaction
open var isMultiScrollInteractionEnable = true

@objc open fileprivate(set) dynamic var currentIndex: Int = 0

// MARK: - Private properties
Expand Down Expand Up @@ -260,6 +268,9 @@ open class FSPagerView: UIView,UICollectionViewDataSource,UICollectionViewDelega
return animationKeys.contains(where: { rotationAnimationKeys.contains($0) })
}
fileprivate var possibleTargetingIndexPath: IndexPath?
fileprivate var offsetAtBegin:CGPoint? {
didSet { if isMultiScrollInteractionEnable { offsetAtBegin = nil } }
}

// MARK: - Overriden functions

Expand Down Expand Up @@ -391,6 +402,14 @@ open class FSPagerView: UIView,UICollectionViewDataSource,UICollectionViewDelega
}

public func scrollViewDidScroll(_ scrollView: UIScrollView) {
if let offset = offsetAtBegin {
let pageSide:CGFloat = collectionViewLayout.itemSpacing
if scrollView.contentOffset.x > offset.x + pageSide {
scrollView.contentOffset.x = offset.x + pageSide
} else if scrollView.contentOffset.x < offset.x - pageSide {
scrollView.contentOffset.x = offset.x - pageSide
}
}
if !self.isPossiblyRotating && self.numberOfItems > 0 {
// In case someone is using KVO
let currentIndex = lround(Double(self.scrollOffset)) % self.numberOfItems
Expand All @@ -411,6 +430,7 @@ open class FSPagerView: UIView,UICollectionViewDataSource,UICollectionViewDelega
if self.automaticSlidingInterval > 0 {
self.cancelTimer()
}
offsetAtBegin = scrollView.contentOffset
}

public func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
Expand All @@ -422,12 +442,16 @@ open class FSPagerView: UIView,UICollectionViewDataSource,UICollectionViewDelega
if self.automaticSlidingInterval > 0 {
self.startTimer()
}
if velocity == .zero {
offsetAtBegin = nil
}
}

public func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
if let function = self.delegate?.pagerViewDidEndDecelerating {
function(self)
}
offsetAtBegin = nil
}

public func scrollViewDidEndScrollingAnimation(_ scrollView: UIScrollView) {
Expand Down