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//
// WFSwiperView.m
// WFModStyle1
//
// Created by wufan on 2021/4/23.
//

import "WFSwiperView.h"

import "WFModSafeTimer.h"

import "WFSwiperViewCell.h"

import "WFPageControl.h"

define MaxSection 20

@interface WFSwiperView()<UICollectionViewDelegate,UICollectionViewDataSource,WFModSafeTimerDelegate>
@property (nonatomic, strong ) UICollectionView *swiperView;
@property (nonatomic, strong ) WFPageControl *pageControl;

@property (nonatomic, strong ) WFModSafeTimer *timer;
@property (nonatomic, strong ) NSMutableArray *items;

@end

@implementation WFSwiperView

• (instancetype)initWithFrame:(CGRect)frame
  {
  self = [super initWithFrame:frame];
  if (self) {

    [self addSubview:self.swiperView];
    [self.swiperView registerClass:[WFSwiperViewCell class] forCellWithReuseIdentifier:@"WFSwiperViewCell"];
    self.backgroundColor  = [UIColor redColor];
    self.timer = [[WFModSafeTimer alloc]init];
    self.timer.delegate = self;
    [self.timer scheduledTimerWithTimeInterval:1.5 repeats:YES];
    
    self.pageControl = [[WFPageControl alloc]initWithFrame:CGRectMake(0, self.frame.size.height-50, self.frame.size.width, 50)];
    [self.pageControl addTarget:self action:@selector(didClickPageCo:) forControlEvents:UIControlEventValueChanged];
    self.pageControl.numberOfPages = 2;
    self.pageControl.currentPage = 0;
    self.pageControl.hidesForSinglePage =self;
    self.pageControl.pageIndicatorTintColor = [UIColor grayColor];
    self.pageControl.currentPageIndicatorTintColor = [UIColor redColor];
  

// [self.pageControl setValue:[UIImage imageNamed:@"select.png"] forKeyPath:@"currentPageImage"];
// [self.pageControl setValue:[UIImage imageNamed:@"common"] forKeyPath:@"pageImage"];

    [self insertSubview:self.pageControl aboveSubview:self.swiperView];
   
}
return self;

}

• (void )didClickPageCo:(UIPageControl *)sender{
  NSInteger page = sender.currentPage;

}

• (void )startTimer :(BOOL )startOrStop{
  if (startOrStop) {
  [self.timer startTimer:YES];
  }else{
  [self.timer stopTimer];
  }
  }

• (void )loadDatas :(NSArray *)items{
  [self.items removeAllObjects];
  self.items = items.mutableCopy;
  // if (items.count>0) {
  // [self.items insertObject:items.lastObject atIndex:0];
  // [self.items addObject:items[0]];
  // }
  [self.timer startTimer:NO];

  [self.swiperView scrollToItemAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:MaxSection/2] atScrollPosition:UICollectionViewScrollPositionRight animated:YES];
  self.pageControl.numberOfPages = items.count;
  }

• (void)timeRuningAction{

  if (self.swiperView.dragging) {
  return;
  }

  {
  NSIndexPath *currentIndexPath = [[self.swiperView indexPathsForVisibleItems] lastObject];

    NSIndexPath *currentIndexPathReset = [NSIndexPath indexPathForItem:currentIndexPath.item inSection:MaxSection/2];
    [self.swiperView scrollToItemAtIndexPath:currentIndexPathReset atScrollPosition:UICollectionViewScrollPositionLeft animated:NO];
  
    NSInteger nextItem = currentIndexPathReset.item +1;
    NSInteger nextSection = currentIndexPathReset.section;
    if (nextItem==self.items.count) {
        nextItem=0;
        nextSection++;
    }
    NSIndexPath *nextIndexPath = [NSIndexPath indexPathForItem:nextItem inSection:nextSection];
    NSLog(@"nextSection :%ld nextItem:%ld",nextSection,nextItem);
    [self.swiperView scrollToItemAtIndexPath:nextIndexPath atScrollPosition:UICollectionViewScrollPositionLeft animated:YES];
  

  }
  }

• (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
  return MaxSection;
  }

• (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
  return self.items.count;
  }

• (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
  WFSwiperViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"WFSwiperViewCell" forIndexPath:indexPath];
  if (!cell) {
  cell = [[WFSwiperViewCell alloc]init];
  }
  [cell loadImage: self.items[indexPath.row]];
  return cell;
  }

• (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
  UIResponder *resp = self;
  while ((resp = [resp nextResponder])) {
  if ([resp isKindOfClass:[UIViewController class]]) {
  UIViewController *co = (UIViewController *)resp;
  UIViewController *pVC = [[NSClassFromString(@"WCModHomePageViewController") alloc]init];
  [co.navigationController pushViewController:pVC animated:YES];
  return;
  }
  }
  }

• (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
  [self.timer stopTimer];
  }

• (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
  [self.timer startTimer:YES];
  }

• (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

}

• (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{

}

• (void)scrollViewDidScroll:(UIScrollView *)scrollView{

  int page = (int) (scrollView.contentOffset.x/scrollView.frame.size.width+0.5)%self.items.count;
  self.pageControl.currentPage =page;

}

• (UICollectionView *)swiperView {
  if (!_swiperView) {

    UICollectionViewFlowLayout *flayout = [[UICollectionViewFlowLayout alloc]init];
    flayout.scrollDirection             = UICollectionViewScrollDirectionHorizontal;
    flayout.minimumLineSpacing          = 0;
    flayout.minimumInteritemSpacing     = 0;
    flayout.itemSize                    = CGSizeMake(ScreenWidth, self.frame.size.height);
    _swiperView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 0, ScreenWidth, self.frame.size.height) collectionViewLayout:flayout];
    _swiperView.pagingEnabled           = YES;
    _swiperView.bounces                 = NO;
    _swiperView.showsHorizontalScrollIndicator = NO;
    _swiperView.showsVerticalScrollIndicator   = NO;
    _swiperView.dataSource              = self;
    _swiperView.delegate                = self;
  

  }
  return _swiperView;
  }

• (NSMutableArray *)items {
  if (!_items) {
  _items = [[NSMutableArray alloc]init];
  }
  return _items;
  }

• (void)dealloc
  {
  [self.timer removeTimer];
  self.timer = nil;
  NSLog(@"轮播图已销毁");
  }
  @end

···
具体代码位置：GitHub