iOS 卡片轮播图
2020-04-14 本文已影响0人
画舫烟中浅
个人学习记录。参考文章：https://github.com/PageGuo/NewPagedFlowView
IMG_2762.GIF
直接贴代码
NewPagedFlowView.h文件
#import <UIKit/UIKit.h>
#import "PGIndexBannerSubiew.h"
@protocol NewPagedFlowViewDataSource;
@protocol NewPagedFlowViewDelegate;
typedef enum{
NewPagedFlowViewOrientationHorizontal = 0,
NewPagedFlowViewOrientationVertical
}NewPagedFlowViewOrientation;
@interface NewPagedFlowView : UIView<UIScrollViewDelegate>
@property (nonatomic,assign) NewPagedFlowViewOrientation orientation;
@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic,assign) BOOL needsReload;
@property (nonatomic,assign) NSInteger pageCount;
@property (nonatomic,strong) NSMutableArray *cells;
@property (nonatomic,assign) NSRange visibleRange;
@property (nonatomic,strong) NSMutableArray *reusableCells;
@property (nonatomic,assign) id <NewPagedFlowViewDataSource> dataSource;
@property (nonatomic,assign) id <NewPagedFlowViewDelegate> delegate;
@property (nonatomic,retain) UIPageControl *pageControl;
@property (nonatomic, assign) CGFloat minimumPageAlpha;
@property (nonatomic, assign) CGFloat leftRightMargin;
@property (nonatomic, assign) CGFloat topBottomMargin;
@property (nonatomic, assign) BOOL isOpenAutoScroll;
@property (nonatomic, assign) BOOL isCarousel;
@property (nonatomic, assign, readonly) NSInteger currentPageIndex;
@property (nonatomic, weak) NSTimer *timer;
@property (nonatomic, assign) CGFloat autoTime;
@property (nonatomic, assign) NSInteger orginPageCount;
- (void)reloadDataWithWidth:(NSInteger) index;;
- (PGIndexBannerSubiew *)dequeueReusableCell;
- (void)scrollToPage:(NSUInteger)pageNumber;
- (void)stopTimer;
- (void)adjustCenterSubview;
@end
@protocol NewPagedFlowViewDelegate<NSObject>
@optional
/**
* 当前显示cell的Size(中间页显示大小)
*
* @param flowView <#flowView description#>
*
* @return <#return value description#>
*/
- (CGSize)sizeForPageInFlowView:(NewPagedFlowView *)flowView;
- (void)didScrollToPage:(NSInteger)pageNumber inFlowView:(NewPagedFlowView *)flowView;
- (void)didSelectCell:(PGIndexBannerSubiew *)subView withSubViewIndex:(NSInteger)subIndex;
@end
@protocol NewPagedFlowViewDataSource <NSObject>
- (NSInteger)numberOfPagesInFlowView:(NewPagedFlowView *)flowView;
- (PGIndexBannerSubiew *)flowView:(NewPagedFlowView *)flowView cellForPageAtIndex:(NSInteger)index;
@end
NewPagedFlowView.m文件
#import "NewPagedFlowView.h"
@interface NewPagedFlowView ()
@property (nonatomic, assign, readwrite) NSInteger currentPageIndex;
@property (nonatomic, assign) NSInteger page;
@property (nonatomic,assign) CGSize pageSize;
@end
//子控制器的类名
static NSString *subviewClassName;
@implementation NewPagedFlowView
#pragma mark -
#pragma mark Private Methods
- (void)initialize{
self.clipsToBounds = YES;
self.needsReload = YES;
self.pageCount = 0;
self.isOpenAutoScroll = NO;
self.isCarousel = YES;
self.leftRightMargin = 20;
self.topBottomMargin = 30;
_currentPageIndex = 0;
_minimumPageAlpha = 1.0;
_autoTime = 5.0;
self.visibleRange = NSMakeRange(0, 0);
self.reusableCells = [[NSMutableArray alloc] initWithCapacity:0];
self.cells = [[NSMutableArray alloc] initWithCapacity:0];
self.scrollView = [[UIScrollView alloc] initWithFrame:self.bounds];
self.scrollView.scrollsToTop = NO;
self.scrollView.delegate = self;
self.scrollView.pagingEnabled = YES;
self.scrollView.clipsToBounds = NO;
self.scrollView.showsHorizontalScrollIndicator = NO;
self.scrollView.showsVerticalScrollIndicator = NO;
subviewClassName = @"PGIndexBannerSubiew";
[self addSubview:self.scrollView];
}
- (void)setLeftRightMargin:(CGFloat)leftRightMargin {
_leftRightMargin = leftRightMargin * 0.5;
}
- (void)setTopBottomMargin:(CGFloat)topBottomMargin {
_topBottomMargin = topBottomMargin * 0.5;
}
- (void)startTimer {
if (self.orginPageCount > 1 && self.isOpenAutoScroll && self.isCarousel) {
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:self.autoTime target:self selector:@selector(autoNextPage) userInfo:nil repeats:YES];
self.timer = timer;
[[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
}
}
- (void)stopTimer {
if (self.timer) {
[self.timer invalidate];
self.timer = nil;
}
}
- (void)adjustCenterSubview {
if (self.isOpenAutoScroll && self.orginPageCount > 0) {
[_scrollView setContentOffset:CGPointMake(_pageSize.width * self.page, 0) animated:NO];
}
}
#pragma mark --自动轮播
- (void)autoNextPage {
self.page ++;
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:{
[_scrollView setContentOffset:CGPointMake(self.page * _pageSize.width, 0) animated:YES];
break;
}
case NewPagedFlowViewOrientationVertical:{
[_scrollView setContentOffset:CGPointMake(0, self.page * _pageSize.height) animated:YES];
break;
}
default:
break;
}
}
- (void)queueReusableCell:(PGIndexBannerSubiew *)cell{
[_reusableCells addObject:cell];
}
- (void)removeCellAtIndex:(NSInteger)index{
PGIndexBannerSubiew *cell = [_cells objectAtIndex:index];
if ((NSObject *)cell == [NSNull null]) {
return;
}
[self queueReusableCell:cell];
if (cell.superview) {
[cell removeFromSuperview];
}
[_cells replaceObjectAtIndex:index withObject:[NSNull null]];
}
- (void)refreshVisibleCellAppearance{
if (_minimumPageAlpha == 1.0 && self.leftRightMargin == 0 && self.topBottomMargin == 0) {
return;//无需更新
}
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:{
CGFloat offset = _scrollView.contentOffset.x;
for (NSInteger i = self.visibleRange.location; i < self.visibleRange.location + _visibleRange.length; i++) {
PGIndexBannerSubiew *cell = [_cells objectAtIndex:i];
subviewClassName = NSStringFromClass([cell class]);
CGFloat origin = cell.frame.origin.x;
CGFloat delta = fabs(origin - offset);
CGRect originCellFrame = CGRectMake(_pageSize.width * i, 0, _pageSize.width, _pageSize.height);//如果没有缩小效果的情况下的本该的Frame
if (delta < _pageSize.width) {
cell.coverView.alpha = (delta / _pageSize.width) * _minimumPageAlpha;
CGFloat leftRightInset = self.leftRightMargin * delta / _pageSize.width;
CGFloat topBottomInset = self.topBottomMargin * delta / _pageSize.width;
cell.layer.transform = CATransform3DMakeScale((_pageSize.width-leftRightInset*2)/_pageSize.width,(_pageSize.height-topBottomInset*2)/_pageSize.height, 1.0);
cell.frame = UIEdgeInsetsInsetRect(originCellFrame, UIEdgeInsetsMake(topBottomInset, leftRightInset, topBottomInset, leftRightInset));
} else {
cell.coverView.alpha = _minimumPageAlpha;
cell.layer.transform = CATransform3DMakeScale((_pageSize.width-self.leftRightMargin*2)/_pageSize.width,(_pageSize.height-self.topBottomMargin*2)/_pageSize.height, 1.0);
cell.frame = UIEdgeInsetsInsetRect(originCellFrame, UIEdgeInsetsMake(self.topBottomMargin, self.leftRightMargin, self.topBottomMargin, self.leftRightMargin));
}
}
break;
}
case NewPagedFlowViewOrientationVertical:{
CGFloat offset = _scrollView.contentOffset.y;
for (NSInteger i = self.visibleRange.location; i < self.visibleRange.location + _visibleRange.length; i++) {
PGIndexBannerSubiew *cell = [_cells objectAtIndex:i];
subviewClassName = NSStringFromClass([cell class]);
CGFloat origin = cell.frame.origin.y;
CGFloat delta = fabs(origin - offset);
CGRect originCellFrame = CGRectMake(0, _pageSize.height * i, _pageSize.width, _pageSize.height);//如果没有缩小效果的情况下的本该的Frame
if (delta < _pageSize.height) {
cell.coverView.alpha = (delta / _pageSize.height) * _minimumPageAlpha;
CGFloat leftRightInset = self.leftRightMargin * delta / _pageSize.height;
CGFloat topBottomInset = self.topBottomMargin * delta / _pageSize.height;
cell.layer.transform = CATransform3DMakeScale((_pageSize.width-leftRightInset*2)/_pageSize.width,(_pageSize.height-topBottomInset*2) / _pageSize.height, 1.0);
cell.frame = UIEdgeInsetsInsetRect(originCellFrame, UIEdgeInsetsMake(topBottomInset, leftRightInset, topBottomInset, leftRightInset));
cell.mainImageView.frame = cell.bounds;
} else {
cell.coverView.alpha = _minimumPageAlpha;
cell.frame = UIEdgeInsetsInsetRect(originCellFrame, UIEdgeInsetsMake(self.topBottomMargin, self.leftRightMargin, self.topBottomMargin, self.leftRightMargin));
cell.mainImageView.frame = cell.bounds;
}
}
}
default:
break;
}
}
- (void)setPageAtIndex:(NSInteger)pageIndex{
NSParameterAssert(pageIndex >= 0 && pageIndex < [_cells count]);
PGIndexBannerSubiew *cell = [_cells objectAtIndex:pageIndex];
if ((NSObject *)cell == [NSNull null]) {
cell = [_dataSource flowView:self cellForPageAtIndex:pageIndex % self.orginPageCount];
NSAssert(cell!=nil, @"datasource must not return nil");
[_cells replaceObjectAtIndex:pageIndex withObject:cell];
cell.tag = pageIndex % self.orginPageCount;
[cell setSubviewsWithSuperViewBounds:CGRectMake(0, 0, _pageSize.width, _pageSize.height)];
__weak __typeof(self) weakSelf = self;
cell.didSelectCellBlock = ^(NSInteger tag, PGIndexBannerSubiew *cell) {
[weakSelf singleCellTapAction:tag withCell:cell];
};
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:
cell.frame = CGRectMake(_pageSize.width * pageIndex, 0, _pageSize.width, _pageSize.height);
break;
case NewPagedFlowViewOrientationVertical:
cell.frame = CGRectMake(0, _pageSize.height * pageIndex, _pageSize.width, _pageSize.height);
break;
default:
break;
}
if (!cell.superview) {
[_scrollView addSubview:cell];
}
}
}
- (void)setPagesAtContentOffset:(CGPoint)offset{
//计算_visibleRange
CGPoint startPoint = CGPointMake(offset.x - _scrollView.frame.origin.x, offset.y - _scrollView.frame.origin.y);
CGPoint endPoint = CGPointMake(startPoint.x + self.bounds.size.width, startPoint.y + self.bounds.size.height);
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:{
NSInteger startIndex = 0;
for (int i =0; i < [_cells count]; i++) {
if (_pageSize.width * (i +1) > startPoint.x) {
startIndex = I;
break;
}
}
NSInteger endIndex = startIndex;
for (NSInteger i = startIndex; i < [_cells count]; i++) {
//如果都不超过则取最后一个
if ((_pageSize.width * (i + 1) < endPoint.x && _pageSize.width * (i + 2) >= endPoint.x) || i+ 2 == [_cells count]) {
endIndex = i + 1;//i+2 是以个数，所以其index需要减去1
break;
}
}
//可见页分别向前向后扩展一个，提高效率
startIndex = MAX(startIndex - 1, 0);
endIndex = MIN(endIndex + 1, [_cells count] - 1);
// self.visibleRange.location = startIndex;
// self.visibleRange.length = endIndex - startIndex + 1;
self.visibleRange = NSMakeRange(startIndex, endIndex - startIndex + 1);
for (NSInteger i = startIndex; i <= endIndex; i++) {
[self setPageAtIndex:i];
}
for (int i = 0; i < startIndex; i ++) {
[self removeCellAtIndex:i];
}
for (NSInteger i = endIndex + 1; i < [_cells count]; i ++) {
[self removeCellAtIndex:i];
}
break;
}
case NewPagedFlowViewOrientationVertical:{
NSInteger startIndex = 0;
for (int i =0; i < [_cells count]; i++) {
if (_pageSize.height * (i +1) > startPoint.y) {
startIndex = I;
break;
}
}
NSInteger endIndex = startIndex;
for (NSInteger i = startIndex; i < [_cells count]; i++) {
//如果都不超过则取最后一个
if ((_pageSize.height * (i + 1) < endPoint.y && _pageSize.height * (i + 2) >= endPoint.y) || i+ 2 == [_cells count]) {
endIndex = i + 1;//i+2 是以个数，所以其index需要减去1
break;
}
}
//可见页分别向前向后扩展一个，提高效率
startIndex = MAX(startIndex - 1, 0);
endIndex = MIN(endIndex + 1, [_cells count] - 1);
_visibleRange.location = startIndex;
_visibleRange.length = endIndex - startIndex + 1;
for (NSInteger i = startIndex; i <= endIndex; i++) {
[self setPageAtIndex:i];
}
for (NSInteger i = 0; i < startIndex; i ++) {
[self removeCellAtIndex:i];
}
for (NSInteger i = endIndex + 1; i < [_cells count]; i ++) {
[self removeCellAtIndex:i];
}
break;
}
default:
break;
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark Override Methods
- (id)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self)
{
[self initialize];
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder{
self = [super initWithCoder:aDecoder];
if (self)
{
[self initialize];
}
return self;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark NewPagedFlowView API
- (void)reloadDataWithWidth:(NSInteger)index {
_needsReload = YES;
//移除所有self.scrollView的子控件
for (UIView *view in self.scrollView.subviews) {
if ([NSStringFromClass(view.class) isEqualToString:subviewClassName] || [view isKindOfClass:[PGIndexBannerSubiew class]]) {
[view removeFromSuperview];
}
}
[self stopTimer];
if (_needsReload) {
//如果需要重新加载数据，则需要清空相关数据全部重新加载
//重置pageCount
if (_dataSource && [_dataSource respondsToSelector:@selector(numberOfPagesInFlowView:)]) {
//原始页数
self.orginPageCount = [_dataSource numberOfPagesInFlowView:self];
//总页数
if (self.isCarousel) {
_pageCount = self.orginPageCount == 1 ? 1: [_dataSource numberOfPagesInFlowView:self] * 3;
}else {
_pageCount = self.orginPageCount == 1 ? 1: [_dataSource numberOfPagesInFlowView:self];
}
//如果总页数为0，return
if (_pageCount == 0) {
return;
}
if (self.pageControl && [self.pageControl respondsToSelector:@selector(setNumberOfPages:)]) {
[self.pageControl setNumberOfPages:self.orginPageCount];
}
}
//重置pageWidth
_pageSize = CGSizeMake(self.bounds.size.width - 4 * self.leftRightMargin,(self.bounds.size.width - 4 * self.leftRightMargin) * 9 /16);
if (self.delegate && self.delegate && [self.delegate respondsToSelector:@selector(sizeForPageInFlowView:)]) {
_pageSize = [self.delegate sizeForPageInFlowView:self];
}
[_reusableCells removeAllObjects];
_visibleRange = NSMakeRange(0, 0);
//填充cells数组
[_cells removeAllObjects];
for (NSInteger index=0; index<_pageCount; index++)
{
[_cells addObject:[NSNull null]];
}
// 重置_scrollView的contentSize
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal://横向
_scrollView.frame = CGRectMake(0, 0, _pageSize.width, _pageSize.height);
_scrollView.contentSize = CGSizeMake(_pageSize.width * _pageCount,0);
CGPoint theCenter = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));
_scrollView.center = theCenter;
if (self.orginPageCount > 1) {
if (self.isCarousel) {
//滚到第二组
[_scrollView setContentOffset:CGPointMake(_pageSize.width * (self.orginPageCount+index), 0) animated:NO];
self.page = self.orginPageCount;
//启动自动轮播
[self startTimer];
}else {
//滚到开始
[_scrollView setContentOffset:CGPointMake(0, 0) animated:NO];
self.page = self.orginPageCount;
}
}
break;
case NewPagedFlowViewOrientationVertical:{
_scrollView.frame = CGRectMake(0, 0, _pageSize.width, _pageSize.height);
_scrollView.contentSize = CGSizeMake(0 ,_pageSize.height * _pageCount);
CGPoint theCenter = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));
_scrollView.center = theCenter;
if (self.orginPageCount > 1) {
if (self.isCarousel) {
//滚到第二组
[_scrollView setContentOffset:CGPointMake(0, _pageSize.height * self.orginPageCount) animated:NO];
self.page = self.orginPageCount;
//启动自动轮播
[self startTimer];
}else {
//滚到第二组
[_scrollView setContentOffset:CGPointMake(0, 0) animated:NO];
self.page = self.orginPageCount;
}
}
break;
}
default:
break;
}
_needsReload = NO;
}
[self setPagesAtContentOffset:_scrollView.contentOffset];//根据当前scrollView的offset设置cell
[self refreshVisibleCellAppearance];//更新各个可见Cell的显示外貌
}
- (PGIndexBannerSubiew *)dequeueReusableCell{
PGIndexBannerSubiew *cell = [_reusableCells lastObject];
if (cell)
{
[_reusableCells removeLastObject];
}
return cell;
}
- (void)scrollToPage:(NSUInteger)pageNumber {
if (pageNumber < _pageCount) {
//首先停止定时器
[self stopTimer];
if (self.isCarousel) {
self.page = pageNumber + self.orginPageCount;
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(startTimer) object:nil];
[self performSelector:@selector(startTimer) withObject:nil afterDelay:0.5];
}else {
self.page = pageNumber;
}
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:
[_scrollView setContentOffset:CGPointMake(_pageSize.width * self.page, 0) animated:YES];
break;
case NewPagedFlowViewOrientationVertical:
[_scrollView setContentOffset:CGPointMake(0, _pageSize.height * self.page) animated:YES];
break;
}
[self setPagesAtContentOffset:_scrollView.contentOffset];
[self refreshVisibleCellAppearance];
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark hitTest
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
if ([self pointInside:point withEvent:event]) {
CGPoint newPoint = CGPointZero;
newPoint.x = point.x - _scrollView.frame.origin.x + _scrollView.contentOffset.x;
newPoint.y = point.y - _scrollView.frame.origin.y + _scrollView.contentOffset.y;
if ([_scrollView pointInside:newPoint withEvent:event]) {
return [_scrollView hitTest:newPoint withEvent:event];
}
return _scrollView;
}
return nil;
}
#pragma mark -
#pragma mark UIScrollView Delegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
if (self.orginPageCount == 0) {
return;
}
NSInteger pageIndex;
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:
pageIndex = (int)round(_scrollView.contentOffset.x / _pageSize.width) % self.orginPageCount;
break;
case NewPagedFlowViewOrientationVertical:
pageIndex = (int)round(_scrollView.contentOffset.y / _pageSize.height) % self.orginPageCount;
break;
default:
break;
}
if (self.isCarousel) {
if (self.orginPageCount > 1) {
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:
{
if (scrollView.contentOffset.x / _pageSize.width >= 2 * self.orginPageCount) {
[scrollView setContentOffset:CGPointMake(_pageSize.width * self.orginPageCount, 0) animated:NO];
self.page = self.orginPageCount;
}
if (scrollView.contentOffset.x / _pageSize.width <= self.orginPageCount - 1) {
[scrollView setContentOffset:CGPointMake((2 * self.orginPageCount - 1) * _pageSize.width, 0) animated:NO];
self.page = 2 * self.orginPageCount;
}
}
break;
case NewPagedFlowViewOrientationVertical:
{
if (scrollView.contentOffset.y / _pageSize.height >= 2 * self.orginPageCount) {
[scrollView setContentOffset:CGPointMake(0, _pageSize.height * self.orginPageCount) animated:NO];
self.page = self.orginPageCount;
}
if (scrollView.contentOffset.y / _pageSize.height <= self.orginPageCount - 1) {
[scrollView setContentOffset:CGPointMake(0, (2 * self.orginPageCount - 1) * _pageSize.height) animated:NO];
self.page = 2 * self.orginPageCount;
}
}
break;
default:
break;
}
}else {
pageIndex = 0;
}
}
[self setPagesAtContentOffset:scrollView.contentOffset];
[self refreshVisibleCellAppearance];
if (self.pageControl && [self.pageControl respondsToSelector:@selector(setCurrentPage:)]) {
[self.pageControl setCurrentPage:pageIndex];
}
if (_delegate && [_delegate respondsToSelector:@selector(didScrollToPage:inFlowView:)] && _currentPageIndex != pageIndex && pageIndex >= 0) {
[_delegate didScrollToPage:pageIndex inFlowView:self];
}
_currentPageIndex = pageIndex;
}
#pragma mark --将要开始拖拽
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
[self stopTimer];
}
#pragma mark --结束拖拽
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
[self startTimer];
}
#pragma mark --将要结束拖拽
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
if (self.orginPageCount > 1 && self.isOpenAutoScroll && self.isCarousel) {
switch (self.orientation) {
case NewPagedFlowViewOrientationHorizontal:
{
if (self.page == floor(_scrollView.contentOffset.x / _pageSize.width)) {
self.page = floor(_scrollView.contentOffset.x / _pageSize.width) + 1;
}else {
self.page = floor(_scrollView.contentOffset.x / _pageSize.width);
}
}
break;
case NewPagedFlowViewOrientationVertical:
{
if (self.page == floor(_scrollView.contentOffset.y / _pageSize.height)) {
self.page = floor(_scrollView.contentOffset.y / _pageSize.height) + 1;
}else {
self.page = floor(_scrollView.contentOffset.y / _pageSize.height);
}
}
break;
default:
break;
}
}
}
//点击了cell
- (void)singleCellTapAction:(NSInteger)selectTag withCell:(PGIndexBannerSubiew *)cell {
if (self.delegate && [self.delegate respondsToSelector:@selector(didSelectCell:withSubViewIndex:)]) {
[self.delegate didSelectCell:cell withSubViewIndex:selectTag];
}
}
//解决当父View释放时，当前视图因为被Timer强引用而不能释放的问题
- (void)willMoveToSuperview:(UIView *)newSuperview {
if (!newSuperview) {
[self stopTimer];
}
}
//解决当timer释放后 回调scrollViewDidScroll时访问野指针导致崩溃
- (void)dealloc {
_scrollView.delegate = nil;
}
@end
PGIndexBannerSubiew.h 文件
#import <UIKit/UIKit.h>
@interface PGIndexBannerSubiew : UIView
@property (nonatomic, strong) UIImageView *mainImageView;
@property (nonatomic, strong) UIView *coverView;
@property (nonatomic, copy) void (^didSelectCellBlock)(NSInteger tag, PGIndexBannerSubiew *cell);
- (void)setSubviewsWithSuperViewBounds:(CGRect)superViewBounds;
@end
PGIndexBannerSubiew.m 文件
#import "PGIndexBannerSubiew.h"
@implementation PGIndexBannerSubiew
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self addSubview:self.mainImageView];
[self addSubview:self.coverView];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleCellTapAction:)];
[self addGestureRecognizer:singleTap];
}
return self;
}
- (void)singleCellTapAction:(UIGestureRecognizer *)gesture {
if (self.didSelectCellBlock) {
self.didSelectCellBlock(self.tag, self);
}
}
- (void)setSubviewsWithSuperViewBounds:(CGRect)superViewBounds {
if (CGRectEqualToRect(self.mainImageView.frame, superViewBounds)) {
return;
}
self.mainImageView.frame = superViewBounds;
self.coverView.frame = superViewBounds;
}
- (UIImageView *)mainImageView {
if (_mainImageView == nil) {
_mainImageView = [[UIImageView alloc] init];
_mainImageView.userInteractionEnabled = YES;
}
return _mainImageView;
}
- (UIView *)coverView {
if (_coverView == nil) {
_coverView = [[UIView alloc] init];
_coverView.backgroundColor = [UIColor blackColor];
}
return _coverView;
}
@end
调用实例：
- (void)viewDidLoad {
[super viewDidLoad];
[self setJJQSubViews];
//加载网络数据后刷新
[self.pageFlowView reloadDataWithWidth:_selectIndex];
}
-(void)setJJQSubViews{
_selectIndex = 0;
[self.view addSubview:self.pageFlowView];
self.pageFlowView.delegate = self;
self.pageFlowView.dataSource = self;
}
-(NewPagedFlowView *)pageFlowView{
if (!_pageFlowView) {
_pageFlowView = [[NewPagedFlowView alloc] initWithFrame:CGRectMake(0, KNavHeight+KScreenHeight/24, KScreenWidth, KScreenHeight-KNavHeight-KTabbarHeight-KScreenHeight/12)];
_pageFlowView.minimumPageAlpha = 0.1;
_pageFlowView.leftRightMargin = KScreenWidth/8-10;
_pageFlowView.topBottomMargin = KScreenHeight/6;
}
return _pageFlowView;
}
#pragma mark NewPagedFlowView Delegate
- (CGSize)sizeForPageInFlowView:(NewPagedFlowView *)flowView {
return CGSizeMake(KScreenWidth*3/4, KScreenHeight-KNavHeight-KTabbarHeight-KScreenHeight/12);
}
- (void)didSelectCell:(UIView *)subView withSubViewIndex:(NSInteger)subIndex {
_selectIndex = subIndex;
NSDictionary * dic = _quality_list[subIndex];
if([dic[@"unlock"] integerValue] == 1){
if ([[[NSUserDefaults standardUserDefaults] objectForKey:@"fire_tag"] integerValue] != 1){
if([dic[@"mod_index"] integerValue] == 5){//跳dz
OgmenaysController * vc = [[OgmenaysController alloc]initWithDataDic:dic];
vc.hidesBottomBarWhenPushed = YES;
[BaseNavigationController pushViewController:vc hiddenBottomWhenPush:YES animation:NO fromNavigation:self.navigationController];
return;
}
}
Astebaskets * vc = [[Astebaskets alloc]initWithDic:dic];
vc.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:vc animated:NO];
}else{
if([Utils isVisitorLogin]){
UidnuncsController * vc =[[UidnuncsController alloc]init];
vc.hidesBottomBarWhenPushed = YES;
vc.isFromFingerprintLogin = YES;
[self.navigationController pushViewController:vc animated:YES];
return;
}
_selectedDic = dic;
self.unlockTipsAlert.str_content = [NSString stringWithFormat:@"打开%@板块需要消耗\n%@金币",dic[@"mod_name"],dic[@"unlock_gold"]];
[[Njocoseness shareAppDelegate].window addSubview:self.unlockTipsAlert];
}
}
#pragma mark NewPagedFlowView Datasource
- (NSInteger)numberOfPagesInFlowView:(NewPagedFlowView *)flowView {
return _quality_list.count;
}
- (PGIndexBannerSubiew *)flowView:(NewPagedFlowView *)flowView cellForPageAtIndex:(NSInteger)index{
PGIndexBannerSubiew *bannerView = [flowView dequeueReusableCell];
if (!bannerView) {
bannerView = [[PGIndexBannerSubiew alloc] init];
bannerView.tag = index;
bannerView.layer.cornerRadius = 20;
bannerView.layer.masksToBounds = YES;
}
NSDictionary * dic = _quality_list[index];
//在这里下载网络图片
[bannerView.mainImageView sd_setImageWithURL:[NSURL URLWithString:dic[@"icon"]] placeholderImage:[UIImage imageNamed:@""]];
return bannerView;
}
