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//
// CSScrollview.m
// Coding_iOS
//
// Created by pan Shiyu on 15/7/16.
// Copyright (c) 2015年 Coding. All rights reserved.
//
#import "CSScrollview.h"
@interface CSScrollview () <UICollectionViewDelegate, UICollectionViewDataSource>
@property (nonatomic, strong) UICollectionView* listView;
@property (nonatomic, strong) UIPageControl* pageControl;
@property (nonatomic, strong) NSTimer* timer;
@end
@implementation CSScrollview
- (instancetype)initWithFrame:(CGRect)frame layout:(UICollectionViewFlowLayout*)layout
{
self = [super initWithFrame:frame];
if (self) {
_listView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height) collectionViewLayout:layout];
_listView.delegate = self;
_listView.dataSource = self;
_listView.backgroundColor = [UIColor clearColor];
_listView.showsHorizontalScrollIndicator = NO;
_listView.showsVerticalScrollIndicator = NO;
_listView.pagingEnabled = YES;
[_listView registerClass:[CSScrollUnit class] forCellWithReuseIdentifier:@"CSScrollUnit"];
[self addSubview:_listView];
_pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, frame.size.height - 20, frame.size.width, 20)];
_pageControl.currentPageIndicatorTintColor = [UIColor redColor];
_pageControl.pageIndicatorTintColor = [UIColor greenColor];
// [_pageControl addTarget:self action:@selector(pageTurn:) forControlEvents:UIControlEventValueChanged]; //用户点击UIPageControl的响应函数
[self addSubview:_pageControl];
}
return self;
}
- (void)update:(NSArray*)datas
{
if (datas.count > 0) {
// dispatch_sync(dispatch_get_main_queue(),^{
_items = [NSArray arrayWithArray:datas];
[_listView reloadData];
_pageControl.currentPage = 0;
_pageControl.numberOfPages = _items.count;
CGSize size= [_pageControl sizeForNumberOfPages:_items.count];
_pageControl.size = CGSizeMake(size.width, 20);
_pageControl.bottom = self.height;
_pageControl.centerX = self.width/2;
if (self.autoScrollEnable) {
[self beginAutoScroll];
}
// });
}
}
- (void)setShowPageControl:(BOOL)showPageControl
{
self.pageControl.hidden = !showPageControl;
}
#pragma mark - autoscroll
- (void)beginAutoScroll
{
if (!_autoScrollEnable) {
return;
}
if (_timer) {
[_timer invalidate];
_timer = nil;
}
_timer = [NSTimer scheduledTimerWithTimeInterval:CSScrollTime target:self selector:@selector(didAutoScroll) userInfo:nil repeats:YES];
[_timer fire];
}
- (void)didAutoScroll
{
if (!_items || _items.count == 0) {
return;
}
NSInteger curIndex = _pageControl.currentPage;
NSInteger willIndex = (curIndex + 1) % _pageControl.numberOfPages;
NSIndexPath* path = [NSIndexPath indexPathForRow:willIndex inSection:0];
[_listView scrollToItemAtIndexPath:path atScrollPosition:UICollectionViewScrollPositionRight animated:YES];
_pageControl.currentPage = willIndex;
// [self beginAutoScroll];
}
#pragma mark -
- (void)collectionView:(UICollectionView*)collectionView didSelectItemAtIndexPath:(NSIndexPath*)indexPath
{
if (_tapBlk) {
_tapBlk(_items[indexPath.row]);
}
}
- (NSInteger)collectionView:(UICollectionView*)collectionView numberOfItemsInSection:(NSInteger)section
{
return _items.count;
}
- (UICollectionViewCell*)collectionView:(UICollectionView*)collectionView cellForItemAtIndexPath:(NSIndexPath*)indexPath
{
CSScrollUnit* unit = [collectionView dequeueReusableCellWithReuseIdentifier:@"CSScrollUnit" forIndexPath:indexPath];
unit.refIteml = _items[indexPath.row];
return unit;
}
//- (void)scrollViewWillBeginDragging:(UIScrollView*)scrollView
//{
// [self beginAutoScroll];
//}
- (void)scrollViewDidEndDecelerating:(UIScrollView*)scrollView
{
//更新UIPageControl的当前页
CGPoint offset = scrollView.contentOffset;
CGRect bounds = scrollView.frame;
[_pageControl setCurrentPage:offset.x / bounds.size.width];
if (!_autoScrollEnable) {
return;
}
NSArray* visiblelist = self.listView.visibleCells;
if (visiblelist.count == 1) {
UICollectionViewCell* visibleCell = visiblelist.lastObject;
NSIndexPath* curIndexPath = [self.listView indexPathForCell:visibleCell];
_pageControl.currentPage = curIndexPath.row;
}
}
//- (void)pageTurn:(UIPageControl*)sender
//{
// //令UIScrollView做出相应的滑动显示
// CGSize viewSize = _listView.frame.size;
// CGRect rect = CGRectMake(sender.currentPage * viewSize.width, 0, viewSize.width, viewSize.height);
// [_listView scrollRectToVisible:rect animated:YES];
//}
@end
@implementation CSScrollItem
+ (instancetype)itemWithData:(id)data imgUrl:(NSString*)imgUrl
{
CSScrollItem* item = [[CSScrollItem alloc] init];
item.data = data;
item.imgUrl = imgUrl;
return item;
}
@end
@implementation CSScrollUnit {
UIImageView* _imgView;
}
- (void)setRefIteml:(CSScrollItem*)refIteml
{
if (!_imgView) {
_imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.width, self.height)];
_imgView.backgroundColor = kColorTableBG;
[self.contentView addSubview:_imgView];
}
[_imgView sd_setImageWithURL:[NSURL URLWithString:refIteml.imgUrl]];
}
@end