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Supports UICollectionView to use custom Layout, and can configure UIC… #273

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Supports UICollectionView to use custom Layout, and can configure UIC… #273

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68 changes: 60 additions & 8 deletions Sources/Core/JXSegmentedView.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -194,6 +194,24 @@ open class JXSegmentedView: UIView, JXSegmentedViewRTLCompatible {
/// 点击切换的时候，contentScrollView的切换是否需要动画
open var isContentScrollViewClickTransitionAnimationEnabled: Bool = true

public enum Direction {
case horizontal
case vertical
}
open var customizeDirection: Direction?

var scrollPosition: UICollectionView.ScrollPosition {
if let customizeDirection {
switch customizeDirection {
case .horizontal:
return .centeredHorizontally
case .vertical:
return .centeredVertically
}
}
return .centeredHorizontally
}

private var itemDataSource = [JXSegmentedBaseItemModel]()
private var innerItemSpacing: CGFloat = 0
private var lastContentOffset: CGPoint = CGPoint.zero
Expand Down Expand Up @@ -350,11 +368,36 @@ open class JXSegmentedView: UIView, JXSegmentedViewRTLCompatible {
}
}

let minX: CGFloat = 0
let maxX = totalContentWidth - bounds.size.width
let targetX = selectedItemFrameX - bounds.size.width/2 + selectedItemWidth/2
collectionView.setContentOffset(CGPoint(x: max(min(maxX, targetX), minX), y: 0), animated: false)

if let customizeDirection {

let indexPath = IndexPath(row: selectedIndex,
section: 0)
if indexPath.item >= 0,
indexPath.section >= 0,
indexPath.section < collectionView.numberOfSections,
indexPath.item < collectionView.numberOfItems(inSection: indexPath.section) {

switch customizeDirection {
case .horizontal:
collectionView.selectItem(
at: indexPath,
animated: false,
scrollPosition: .centeredHorizontally)
case .vertical:
collectionView.selectItem(
at: indexPath,
animated: false,
scrollPosition: .centeredVertically)
}
}

} else {
let minX: CGFloat = 0
let maxX = totalContentWidth - bounds.size.width
let targetX = selectedItemFrameX - bounds.size.width/2 + selectedItemWidth/2
collectionView.setContentOffset(CGPoint(x: max(min(maxX, targetX), minX), y: 0), animated: false)
}

if contentScrollView != nil {
if contentScrollView!.frame.equalTo(CGRect.zero) &&
contentScrollView!.superview != nil {
Expand Down Expand Up @@ -562,14 +605,23 @@ open class JXSegmentedView: UIView, JXSegmentedViewRTLCompatible {
//延时为了解决cellwidth变化，点击最后几个cell，scrollToItem会出现位置偏移bu。需要等cellWidth动画渐变结束后再滚动到index的cell位置。
let selectedAnimationDurationInMilliseconds = Int((dataSource?.selectedAnimationDuration ?? 0)*1000)
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + DispatchTimeInterval.milliseconds(selectedAnimationDurationInMilliseconds)) {
self.collectionView.scrollToItem(at: IndexPath(item: index, section: 0), at: .centeredHorizontally, animated: true)
self.collectionView.scrollToItem(
at: IndexPath(item: index, section: 0),
at: self.scrollPosition,
animated: true)
}
}else if selectedType == .scroll {
//滚动选中的直接处理
collectionView.scrollToItem(at: IndexPath(item: index, section: 0), at: .centeredHorizontally, animated: true)
collectionView.scrollToItem(
at: IndexPath(item: index, section: 0),
at: self.scrollPosition,
animated: true)
}
}else {
collectionView.scrollToItem(at: IndexPath(item: index, section: 0), at: .centeredHorizontally, animated: true)
collectionView.scrollToItem(
at: IndexPath(item: index, section: 0),
at: self.scrollPosition,
animated: true)
}

if contentScrollView != nil && (selectedType == .click || selectedType == .code) {
Expand Down