百度企业网站建设,旅游app营销策略,关于企业网站建设,搭建wordpress需要php环境吗首先查看效果图
就是开始滚动的时候#xff0c;上面的头部和下面的内容是 一起滚动的#xff0c;但是当滚动到segment 的时候#xff0c;segment 是悬停 的#xff0c;下面的tableView是分区的
架构设计
我们设计一个架构#xff0c;以下面的tablView为主体#xff0…首先查看效果图
就是开始滚动的时候上面的头部和下面的内容是 一起滚动的但是当滚动到segment 的时候segment 是悬停 的下面的tableView是分区的
架构设计
我们设计一个架构以下面的tablView为主体上面的内容放在tablView 的contentInset.top范围内当上滑滚动的时候如果滑动距离超过了segment的位置则将segment放在tableView的父视图上这样达到了一个悬停的效果看上去是悬停了其实是segment的父视图从tableView 变成了tableView的父视图下拉的时候同样如此当下拉达到临界便宜量的时候segment的就从tableView的父视图变成了tablView这样就跟着tableView滚动了达到了顺畅嵌套滚动的效果
代码 interface LBPageSmoothView()UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout, UIGestureRecognizerDelegate
property (nonatomic, weak) id dataSource; property (nonatomic, strong) GKPageSmoothCollectionView *listCollectionView; property (nonatomic, strong) NSMutableDictionary NSNumber *, id *listDict; property (nonatomic, strong) NSMutableDictionary NSNumber *, UIView * *listHeaderDict;
property (nonatomic, assign) LBPageSmoothHoverType hoverType;
property (nonatomic, strong) UIView *headerContainerView; property (nonatomic, weak) UIView *headerView; property (nonatomic, weak) UIView *segmentedView; property (nonatomic, weak) UIScrollView *currentListScrollView;
property (nonatomic, strong) UIView *bottomContainerView;
property (nonatomic, assign) BOOL syncListContentOffsetEnabled; property (nonatomic, assign) CGFloat currentHeaderContainerViewY;
property (nonatomic, assign) CGFloat headerContainerHeight; property (nonatomic, assign) CGFloat headerHeight; property (nonatomic, assign) CGFloat segmentedHeight; property (nonatomic, assign) CGFloat currentListInitializeContentOffsetY;
property (nonatomic, assign) NSInteger currentIndex;
property (nonatomic, assign) BOOL isLoaded;
property (nonatomic, strong) UIPanGestureRecognizer *panGesture;
property (nonatomic, weak) UIScrollView *scrollView; property (nonatomic, assign) BOOL isDragScrollView; property (nonatomic, assign) CGFloat lastTransitionY; property (nonatomic, assign) BOOL isOnTop;
property (nonatomic, assign) CGFloat currentListPanBeganContentOffsetY; property (nonatomic, assign) BOOL originBounces; property (nonatomic, assign) BOOL originShowsVerticalScrollIndicator;
end
implementation LBPageSmoothView (instancetype)initWithDataSource:(id)dataSource { if (self [super initWithFrame:CGRectZero]) { self.dataSource dataSource; _listDict [NSMutableDictionary dictionary]; _listHeaderDict [NSMutableDictionary dictionary]; _ceilPointHeight 0; [self addSubview:self.listCollectionView];[self addSubview:self.headerContainerView];[self refreshHeaderView];} return self; } (void)dealloc { for (id listItem in self.listDict.allValues) { [listItem.listScrollView removeObserver:self forKeyPath:“contentOffset”]; } } (void)layoutSubviews { [super layoutSubviews]; if (self.listCollectionView.superview self) { self.listCollectionView.frame self.bounds; }else { CGRect frame self.listCollectionView.frame; frame.origin.y self.segmentedHeight; frame.size.height self.bottomContainerView.frame.size.height - self.segmentedHeight; self.listCollectionView.frame frame; } } (void)refreshHeaderView { [self loadHeaderAndSegmentedView]; __weak __typeof(self) weakSelf self; [self refreshWidthCompletion:^(CGSize size) { __strong __typeof(weakSelf) self weakSelf; CGRect frame self.headerContainerView.frame; if (CGRectEqualToRect(frame, CGRectZero)) { frame CGRectMake(0, 0, size.width, self.headerContainerHeight); }else { frame.size.height self.headerContainerHeight; } self.headerContainerView.frame frame; self.headerView.frame CGRectMake(0, 0, size.width, self.headerHeight);self.segmentedView.frame CGRectMake(0, self.headerHeight, size.width, self.segmentedHeight);for (idLBPageSmoothListViewDelegate list in self.listDict.allValues) {list.listScrollView.contentInset UIEdgeInsetsMake(self.headerContainerHeight, 0, 0, 0);}if (self.isBottomHover) {self.bottomContainerView.frame CGRectMake(0, size.height - self.segmentedHeight, size.width, size.height - self.ceilPointHeight);if (self.headerHeight size.height) {self.segmentedView.frame CGRectMake(0, 0, size.width, self.segmentedHeight);[self.bottomContainerView addSubview:self.segmentedView];}}}]; } (void)updateSegmentHeight:(CGFloat)height { CGFloat offset height - self.segmentedHeight; self.segmentedHeight height; self.headerContainerHeight self.headerHeight self.segmentedHeight; for (id list in self.listDict.allValues) { CGFloat currentOffset list.listScrollView.contentOffset.y; list.listScrollView.contentInset UIEdgeInsetsMake(self.headerContainerHeight, 0, 0, 0); CGPoint tooffset CGPointMake(0, currentOffset - offset); list.listScrollView.contentOffset tooffset; } self.segmentedView.frame CGRectMake(CGRectGetMinX(self.segmentedView.frame), CGRectGetMinY(self.segmentedView.frame), CGRectGetWidth(self.segmentedView.frame), height); self.headerContainerView.frame CGRectMake(CGRectGetMinX(self.headerContainerView.frame), CGRectGetMinY(self.headerContainerView.frame), CGRectGetWidth(self.headerContainerView.frame), self.headerContainerHeight); for (UIView *listHeaderView in self.listHeaderDict.allValues) { listHeaderView.frame CGRectMake(0, -self.headerContainerHeight, self.bounds.size.width, self.headerContainerHeight); } } (void)reloadData { self.currentListScrollView nil; self.currentIndex self.defaultSelectedIndex; self.syncListContentOffsetEnabled NO; self.currentHeaderContainerViewY 0; self.isLoaded YES; [self.listHeaderDict removeAllObjects]; for (id list in self.listDict.allValues) { [list.listScrollView removeObserver:self forKeyPath:“contentOffset”]; [list.listView removeFromSuperview]; } [_listDict removeAllObjects]; __weak __typeof(self) weakSelf self; [self refreshWidthCompletion:^(CGSize size) { __strong __typeof(weakSelf) self weakSelf; [self.listCollectionView setContentOffset:CGPointMake(size.width * self.currentIndex, 0) animated:NO]; [self.listCollectionView reloadData]; }]; } (void)scrollToOriginalPoint { [self.currentListScrollView setContentOffset:CGPointMake(0, -self.headerContainerHeight) animated:YES]; } (void)scrollToCriticalPoint { [self.currentListScrollView setContentOffset:CGPointMake(0, -(self.segmentedHeightself.ceilPointHeight)) animated:YES]; } (void)showingOnTop { if (self.bottomContainerView.isHidden) return; [self dragBegan]; [self dragShowing]; } (void)showingOnBottom { if (self.bottomContainerView.isHidden) return; [self dragDismiss]; } (void)setBottomHover:(BOOL)bottomHover { _bottomHover bottomHover; if (bottomHover) { __weak __typeof(self) weakSelf self; [self refreshWidthCompletion:^(CGSize size) { __strong __typeof(weakSelf) self weakSelf; self.bottomContainerView.frame CGRectMake(0, size.height - self.segmentedHeight, size.width, size.height - self.ceilPointHeight); [self addSubview:self.bottomContainerView]; if (self.headerHeight size.height) {self.segmentedView.frame CGRectMake(0, 0, size.width, self.segmentedHeight);[self.bottomContainerView addSubview:self.segmentedView];}}];}else { [self.bottomContainerView removeFromSuperview]; } } (void)setAllowDragBottom:(BOOL)allowDragBottom { _allowDragBottom allowDragBottom; if (self.bottomHover) { if (allowDragBottom) { [self.bottomContainerView addGestureRecognizer:self.panGesture]; }else { [self.bottomContainerView removeGestureRecognizer:self.panGesture]; } } }
#pragma mark - UICollectionViewDataSource (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView { return self.isLoaded ? 1 : 0; } (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section { return [self.dataSource numberOfListsInSmoothView:self]; } (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { UICollectionViewCell *cell [collectionView dequeueReusableCellWithReuseIdentifier:GKPageSmoothViewCellID forIndexPath:indexPath]; id list self.listDict[(indexPath.item)]; if (list nil) { list [self.dataSource smoothView:self initListAtIndex:indexPath.item]; _listDict[(indexPath.item)] list; [list.listView setNeedsLayout]; [list.listView layoutIfNeeded]; UIScrollView *listScrollView list.listScrollView;if ([listScrollView isKindOfClass:[UITableView class]]) {((UITableView *)listScrollView).estimatedRowHeight 0;((UITableView *)listScrollView).estimatedSectionHeaderHeight 0;((UITableView *)listScrollView).estimatedSectionFooterHeight 0;}if (available(iOS 11.0, *)) {listScrollView.contentInsetAdjustmentBehavior UIScrollViewContentInsetAdjustmentNever;}if (CGSizeEqualToSize(listScrollView.contentSize, CGSizeZero)) {listScrollView.contentSize CGSizeMake(listScrollView.contentSize.width, self.bounds.size.height);}if (!self.isOnTop) {listScrollView.contentInset UIEdgeInsetsMake(self.headerContainerHeight, 0, self.bottomInset, 0);self.currentListInitializeContentOffsetY -listScrollView.contentInset.top MIN(-self.currentHeaderContainerViewY, (self.headerHeight - self.ceilPointHeight));listScrollView.contentOffset CGPointMake(0, self.currentListInitializeContentOffsetY);}UIView *listHeader [[UIView alloc] initWithFrame:CGRectMake(0, -self.headerContainerHeight, self.bounds.size.width, self.headerContainerHeight)];[listScrollView addSubview:listHeader];if (!self.isOnTop self.headerContainerView.superview nil) {[listHeader addSubview:self.headerContainerView];}self.listHeaderDict[(indexPath.item)] listHeader;[listScrollView addObserver:self forKeyPath:contentOffset options:NSKeyValueObservingOptionNew context:nil];// bug fix #69 修复首次进入时可能出现的headerView无法下拉的问题[listScrollView setContentOffset:listScrollView.contentOffset];} for (id listItem in self.listDict.allValues) { listItem.listScrollView.scrollsToTop (listItem list); } UIView *listView list.listView; if (listView ! nil listView.superview ! cell.contentView) { for (UIView *view in cell.contentView.subviews) { [view removeFromSuperview]; } listView.frame cell.contentView.bounds; [cell.contentView addSubview:listView]; } return cell; } (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath { return self.listCollectionView.bounds.size; } (void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath { [self listDidAppear:indexPath.item]; } (void)collectionView:(UICollectionView *)collectionView didEndDisplayingCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath { [self listDidDisappear:indexPath.item]; } (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { self.panGesture.enabled NO; } (void)scrollViewDidScroll:(UIScrollView *)scrollView { if ([self.delegate respondsToSelector:selector(smoothView:scrollViewDidScroll:)]) { [self.delegate smoothView:self scrollViewDidScroll:scrollView]; } NSInteger index scrollView.contentOffset.x / scrollView.bounds.size.width; NSInteger ratio (int)scrollView.contentOffset.x % (int)scrollView.bounds.size.width; if (!self.isOnTop) { UIScrollView *listScrollView self.listDict[(index)].listScrollView; if (index ! self.currentIndex ratio 0 !(scrollView.isDragging || scrollView.isDecelerating) listScrollView.contentOffset.y -(self.segmentedHeight self.ceilPointHeight)) { [self horizontalScrollDidEndAtIndex:index]; }else { // 左右滚动的时候把headerContainerView添加到self达到悬浮的效果 if (self.headerContainerView.superview ! self) { CGRect frame self.headerContainerView.frame; frame.origin.y self.currentHeaderContainerViewY; self.headerContainerView.frame frame; [self addSubview:self.headerContainerView]; } } } if (index ! self.currentIndex ratio 0) { self.currentIndex index; } } (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate { if (!decelerate) { NSInteger index scrollView.contentOffset.x / scrollView.bounds.size.width; [self horizontalScrollDidEndAtIndex:index]; } self.panGesture.enabled YES; } (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { NSInteger index scrollView.contentOffset.x / scrollView.bounds.size.width; [self horizontalScrollDidEndAtIndex:index]; self.panGesture.enabled YES; } (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView { // 修复快速闪烁问题 self.currentIndex scrollView.contentOffset.x / scrollView.bounds.size.width; self.currentListScrollView self.listDict[(self.currentIndex)].listScrollView; }
#pragma mark - KVO
(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionaryNSKeyValueChangeKey,id *)change context:(void *)context { if ([keyPath isEqualToString:“contentOffset”]) { UIScrollView *scrollView (UIScrollView *)object; if (scrollView ! nil) { [self listScrollViewDidScroll:scrollView]; } }else { [super observeValueForKeyPath:keyPath ofObject:object change:change context:context]; } }
#pragma mark - Gesture (void)handlePanGesture:(UIPanGestureRecognizer *)panGesture { if (panGesture.state UIGestureRecognizerStateBegan) { if ([self.delegate respondsToSelector:selector(smoothViewDragBegan:)]) { [self.delegate smoothViewDragBegan:self]; } [self dragBegan]; // 记录scrollView的某些属性self.originBounces self.scrollView.bounces;self.originShowsVerticalScrollIndicator self.scrollView.showsVerticalScrollIndicator;// bug fix #47当UIScrollView向下滚动的时候向下拖拽完成手势操作导致的错乱问题if (self.currentListScrollView.isDecelerating) {[self.currentListScrollView setContentOffset:self.currentListScrollView.contentOffset animated:NO];}} CGPoint translation [panGesture translationInView:self.bottomContainerView]; if (self.isDragScrollView) { [self allowScrolling:self.scrollView]; // 当UIScrollView在最顶部时处理视图的滑动 if (self.scrollView.contentOffset.y 0) { if (translation.y 0) { // 向下拖拽 [self forbidScrolling:self.scrollView]; self.isDragScrollView NO; CGRect frame self.bottomContainerView.frame;frame.origin.y translation.y;self.bottomContainerView.frame frame;if (!self.isAllowDragScroll) {self.scrollView.panGestureRecognizer.enabled NO;self.scrollView.panGestureRecognizer.enabled YES;}}}}else { CGFloat offsetY self.scrollView.contentOffset.y; CGFloat ceilPointY self.ceilPointHeight; if (offsetY 0) {[self forbidScrolling:self.scrollView];if (translation.y 0) { // 向下拖拽CGRect frame self.bottomContainerView.frame;frame.origin.y translation.y;self.bottomContainerView.frame frame;}else if (translation.y 0 self.bottomContainerView.frame.origin.y ceilPointY) { // 向上拖拽CGRect frame self.bottomContainerView.frame;frame.origin.y MAX((self.bottomContainerView.frame.origin.y translation.y), ceilPointY);self.bottomContainerView.frame frame;}}else {if (translation.y 0 self.bottomContainerView.frame.origin.y ceilPointY) {CGRect frame self.bottomContainerView.frame;frame.origin.y MAX((self.bottomContainerView.frame.origin.y translation.y), ceilPointY);self.bottomContainerView.frame frame;}if (self.bottomContainerView.frame.origin.y ceilPointY) {[self forbidScrolling:self.scrollView];}else {[self allowScrolling:self.scrollView];}}} if (panGesture.state UIGestureRecognizerStateEnded) { CGPoint velocity [panGesture velocityInView:self.bottomContainerView]; if (velocity.y 0) { // 上滑 if (fabs(self.lastTransitionY) 5 self.isDragScrollView NO) { [self dragShowing]; }else { if (self.bottomContainerView.frame.origin.y (self.ceilPointHeight self.bottomContainerView.frame.size.height / 2)) { [self dragDismiss]; }else { [self dragShowing]; } } }else { // 下滑 if (fabs(self.lastTransitionY) 5 self.isDragScrollView NO !self.scrollView.isDecelerating) { [self dragDismiss]; }else { if (self.bottomContainerView.frame.origin.y (self.ceilPointHeight self.bottomContainerView.frame.size.height / 2)) { [self dragDismiss]; }else { [self dragShowing]; } } } [self allowScrolling:self.scrollView];self.isDragScrollView NO;self.scrollView nil;} [panGesture setTranslation:CGPointZero inView:self.bottomContainerView]; self.lastTransitionY translation.y; }
#pragma mark - UIGestureRecognizerDelegate (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch { if (gestureRecognizer self.panGesture) { UIView *touchView touch.view; while (touchView ! nil) { if (touchView self.currentListScrollView) { self.scrollView (UIScrollView *)touchView; self.isDragScrollView YES; break; }else if (touchView self.bottomContainerView) { self.isDragScrollView NO; break; } touchView (UIView *)[touchView nextResponder]; } } return YES; } (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer { // 左右滑动时禁止上下滑动 CGPoint transition [gestureRecognizer translationInView:gestureRecognizer.view]; if (transition.x ! 0) return NO; return YES; } (BOOL)gestureRecognizer:(UIPanGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer { if (gestureRecognizer self.panGesture) { if (otherGestureRecognizer self.scrollView.panGestureRecognizer) { return YES; } } return NO; }
#pragma mark - Private Methods (void)listScrollViewDidScroll:(UIScrollView *)scrollView { if (self.listCollectionView.isDragging || self.listCollectionView.isDecelerating) return; if (self.isOnTop) { // 在顶部时无需处理headerView // 取消scrollView下滑时的弹性效果 // buf fix #47iOS12及以下系统isDragging会出现不准确的情况所以这里改为用isTracking判断 if (self.isAllowDragScroll (scrollView.isTracking || scrollView.isDecelerating)) { if (scrollView.contentOffset.y 0) { scrollView.contentOffset CGPointZero; } } if ([self.delegate respondsToSelector:selector(smoothView:listScrollViewDidScroll:contentOffset:)]) {[self.delegate smoothView:self listScrollViewDidScroll:scrollView contentOffset:scrollView.contentOffset];}}else { // 不在顶部通过列表scrollView滑动确定悬浮位置 NSInteger listIndex [self listIndexForListScrollView:scrollView]; if (listIndex ! self.currentIndex) return; self.currentListScrollView scrollView; CGFloat contentOffsetY scrollView.contentOffset.y self.headerContainerHeight; if (contentOffsetY (self.headerHeight - self.ceilPointHeight)) {self.hoverType LBPageSmoothHoverTypeNone;self.syncListContentOffsetEnabled YES;self.currentHeaderContainerViewY -contentOffsetY;for (idLBPageSmoothListViewDelegate list in self.listDict.allValues) {if (list.listScrollView ! scrollView) {[list.listScrollView setContentOffset:scrollView.contentOffset animated:NO];}}UIView *listHeader [self listHeaderForListScrollView:scrollView];if (self.headerContainerView.superview ! listHeader) {CGRect frame self.headerContainerView.frame;frame.origin.y 0;self.headerContainerView.frame frame;[listHeader addSubview:self.headerContainerView];}if (self.isControlVerticalIndicator self.ceilPointHeight ! 0) {self.currentListScrollView.showsVerticalScrollIndicator NO;}if (self.isBottomHover) {if (contentOffsetY (self.headerContainerHeight - self.frame.size.height)) {self.hoverType LBPageSmoothHoverTypeBottom;if (self.segmentedView.superview ! self.bottomContainerView) {self.bottomContainerView.hidden NO;CGRect frame self.segmentedView.frame;frame.origin.y 0;self.segmentedView.frame frame;[self.bottomContainerView addSubview:self.segmentedView];}}else {if (self.segmentedView.superview ! self.headerContainerView) {self.bottomContainerView.hidden YES;CGRect frame self.segmentedView.frame;frame.origin.y self.headerHeight;self.segmentedView.frame frame;[self.headerContainerView addSubview:self.segmentedView];}}}}else {self.hoverType LBPageSmoothHoverTypeTop;if (self.headerContainerView.superview ! self) {CGRect frame self.headerContainerView.frame;frame.origin.y - (self.headerHeight - self.ceilPointHeight);self.headerContainerView.frame frame;[self addSubview:self.headerContainerView];}if (self.isControlVerticalIndicator) {self.currentListScrollView.showsVerticalScrollIndicator YES;}if (self.syncListContentOffsetEnabled) {self.syncListContentOffsetEnabled NO;self.currentHeaderContainerViewY -(self.headerHeight - self.ceilPointHeight);for (idLBPageSmoothListViewDelegate listItem in self.listDict.allValues) {if (listItem.listScrollView ! scrollView) {[listItem.listScrollView setContentOffset:CGPointMake(0, -(self.segmentedHeight self.ceilPointHeight)) animated:NO];}}}}CGPoint contentOffset CGPointMake(scrollView.contentOffset.x, contentOffsetY);if ([self.delegate respondsToSelector:selector(smoothView:listScrollViewDidScroll:contentOffset:)]) {[self.delegate smoothView:self listScrollViewDidScroll:scrollView contentOffset:contentOffset];}} } (void)loadHeaderAndSegmentedView { self.headerView [self.dataSource headerViewInSmoothView:self]; self.segmentedView [self.dataSource segmentedViewInSmoothView:self]; [self.headerContainerView addSubview:self.headerView]; [self.headerContainerView addSubview:self.segmentedView]; self.headerHeight self.headerView.bounds.size.height; self.segmentedHeight self.segmentedView.bounds.size.height; self.headerContainerHeight self.headerHeight self.segmentedHeight; } (void)refreshWidthCompletion:(void(^)(CGSize size))completion { if (self.bounds.size.width 0) { dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1f * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ !completion ? : completion(self.bounds.size); }); }else { !completion ? : completion(self.bounds.size); } } (void)horizontalScrollDidEndAtIndex:(NSInteger)index { self.currentIndex index; UIView *listHeader self.listHeaderDict[(index)]; UIScrollView *listScrollView self.listDict[(index)].listScrollView; self.currentListScrollView listScrollView; if (self.isOnTop) return; if (listHeader ! nil listScrollView.contentOffset.y -(self.segmentedHeight self.ceilPointHeight)) { for (id listItem in self.listDict.allValues) { listItem.listScrollView.scrollsToTop (listItem.listScrollView listScrollView); } CGRect frame self.headerContainerView.frame; frame.origin.y 0; self.headerContainerView.frame frame; if (self.headerContainerView.superview ! listHeader) { [listHeader addSubview:self.headerContainerView]; } } } (UIView *)listHeaderForListScrollView:(UIScrollView *)scrollView { for (NSNumber *index in self.listDict) { if (self.listDict[index].listScrollView scrollView) { return self.listHeaderDict[index]; } } return nil; } (NSInteger)listIndexForListScrollView:(UIScrollView *)scrollView { for (NSNumber *index in self.listDict) { if (self.listDict[index].listScrollView scrollView) { return index.integerValue; } } return 0; } (void)listDidAppear:(NSInteger)index { NSUInteger count [self.dataSource numberOfListsInSmoothView:self]; if (count 0 || index count) return; id list self.listDict[(index)]; if (list [list respondsToSelector:selector(listViewDidAppear)]) { [list listViewDidAppear]; } } (void)listDidDisappear:(NSInteger)index { NSUInteger count [self.dataSource numberOfListsInSmoothView:self]; if (count 0 || index count) return; id list self.listDict[(index)]; if (list [list respondsToSelector:selector(listViewDidDisappear)]) { [list listViewDidDisappear]; } } (void)allowScrolling:(UIScrollView *)scrollView { scrollView.bounces self.originBounces; scrollView.showsVerticalScrollIndicator self.originShowsVerticalScrollIndicator; } (void)forbidScrolling:(UIScrollView *)scrollView { scrollView.contentOffset CGPointZero; scrollView.bounces NO; scrollView.showsVerticalScrollIndicator NO; } (void)dragBegan { self.isOnTop YES; [self setupShowingLayout]; } (void)dragDismiss { [UIView animateWithDuration:0.25 animations:^{ CGRect frame self.bottomContainerView.frame; frame.origin.y self.frame.size.height - self.segmentedHeight; self.bottomContainerView.frame frame; } completion:^(BOOL finished) { [self setupDismissLayout]; self.isOnTop NO;if ([self.delegate respondsToSelector:selector(smoothViewDragEnded:isOnTop:)]) {[self.delegate smoothViewDragEnded:self isOnTop:self.isOnTop];}}]; } (void)dragShowing { [UIView animateWithDuration:0.25 animations:^{ CGRect frame self.bottomContainerView.frame; frame.origin.y self.ceilPointHeight; self.bottomContainerView.frame frame; } completion:^(BOOL finished) { if ([self.delegate respondsToSelector:selector(smoothViewDragEnded:isOnTop:)]) { [self.delegate smoothViewDragEnded:self isOnTop:self.isOnTop]; } }]; } (void)setupShowingLayout { // 将headerContainerView添加到self if (self.headerContainerView.superview ! self) { CGRect frame self.headerContainerView.frame; frame.origin.y -(self.currentListScrollView.contentOffset.y self.headerContainerHeight); self.headerContainerView.frame frame; [self insertSubview:self.headerContainerView belowSubview:self.bottomContainerView]; } // 将listCollectionView添加到bottomContainerView if (self.listCollectionView.superview ! self.bottomContainerView) { CGRect frame self.listCollectionView.frame; frame.origin.y self.segmentedHeight; frame.size.height self.bottomContainerView.frame.size.height - self.segmentedHeight; self.listCollectionView.frame frame; [self.bottomContainerView addSubview:self.listCollectionView]; self-_listCollectionView.headerContainerView nil; // 记录当前列表的滑动位置self.currentListPanBeganContentOffsetY self.currentListScrollView.contentOffset.y;for (idLBPageSmoothListViewDelegate list in self.listDict.allValues) {list.listScrollView.contentInset UIEdgeInsetsZero;list.listScrollView.contentOffset CGPointZero;CGRect frame list.listView.frame;frame.size self.listCollectionView.bounds.size;list.listView.frame frame;}} } (void)setupDismissLayout { UIView *listHeader [self listHeaderForListScrollView:self.currentListScrollView]; if (self.headerContainerView.superview ! listHeader) { CGRect frame self.headerContainerView.frame; frame.origin.y 0; self.headerContainerView.frame frame; [listHeader addSubview:self.headerContainerView]; } if (self.listCollectionView.superview ! self) { self.listCollectionView.frame self.bounds; [self insertSubview:self.listCollectionView belowSubview:self.bottomContainerView]; self-_listCollectionView.headerContainerView self.headerContainerView; for (idLBPageSmoothListViewDelegate list in self.listDict.allValues) {list.listScrollView.contentInset UIEdgeInsetsMake(self.headerContainerHeight, 0, 0, 0);list.listScrollView.contentOffset CGPointZero;CGRect frame list.listView.frame;frame.size self.listCollectionView.bounds.size;list.listView.frame frame;}self.currentListScrollView.contentOffset CGPointMake(0, self.currentListPanBeganContentOffsetY);} }
#pragma mark - Getter (UICollectionView *)listCollectionView { if (!_listCollectionView) { UICollectionViewFlowLayout *layout [UICollectionViewFlowLayout new]; layout.scrollDirection UICollectionViewScrollDirectionHorizontal; layout.minimumLineSpacing 0; layout.minimumInteritemSpacing 0; _listCollectionView [[GKPageSmoothCollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout]; _listCollectionView.dataSource self; _listCollectionView.delegate self; _listCollectionView.pagingEnabled YES; _listCollectionView.bounces NO; _listCollectionView.showsHorizontalScrollIndicator NO; _listCollectionView.scrollsToTop NO; [_listCollectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:GKPageSmoothViewCellID]; if (available(iOS 11.0, *)) { _listCollectionView.contentInsetAdjustmentBehavior UIScrollViewContentInsetAdjustmentNever; } if (available(iOS 10.0, *)) { _listCollectionView.prefetchingEnabled NO; } _listCollectionView.backgroundColor [UIColor clearColor]; _listCollectionView.headerContainerView self.headerContainerView; } return _listCollectionView; } (UIView *)headerContainerView { if (!_headerContainerView) { _headerContainerView [UIView new]; } return _headerContainerView; } (UIView *)bottomContainerView { if (!_bottomContainerView) { _bottomContainerView [UIView new]; _bottomContainerView.backgroundColor UIColor.whiteColor; } return _bottomContainerView; } (UIPanGestureRecognizer *)panGesture { if (!_panGesture) { _panGesture [[UIPanGestureRecognizer alloc] initWithTarget:self action:selector(handlePanGesture:)]; _panGesture.delegate self; } return _panGesture; }
end
