#import "CLLCarouselView.h"@interface CLLCarouselView ()/**
左边的图片 -- 上一张
*/
@property (nonatomic, strong)UIImageView * leftImageView;
/**
中间的图片 -- 显示的图片
*/
@property (nonatomic, strong)UIImageView * centerImageView;
/**
右边的图片 -- 下一张
*/
@property (nonatomic, strong)UIImageView * rightImageView;
/**
滚动图
*/
@property (nonatomic, strong)UIScrollView * contentView;
/**
分页点
*/
@property (nonatomic, strong)UIPageControl * pageControl;
/**
显示图片的下标
*/
@property (nonatomic, assign)int pageIndex;
/**
定时器
*/
@property (nonatomic, strong)NSTimer * aTimer;
@end
@implementation CLLCarouselView
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self setupSubviews];
// self.backgroundColor = [UIColor magentaColor];
}
return self;
}
- (void)setupSubviews
{
self.contentView = [[UIScrollView alloc] initWithFrame:self.bounds];
_contentView.pagingEnabled = YES;
_contentView.showsVerticalScrollIndicator = NO;
_contentView.showsHorizontalScrollIndicator = NO;
_contentView.alwaysBounceHorizontal = YES;
_contentView.contentSize = CGSizeMake(self.width * 3, 0);
// _contentView.backgroundColor = [UIColor redColor];
_contentView.delegate = self;
[self addSubview:_contentView];
self.leftImageView = [[UIImageView alloc] initWithFrame:_contentView.bounds];
_leftImageView.left = 0;
// _leftImageView.backgroundColor = MHCustomColor;
[_contentView addSubview:_leftImageView];
self.centerImageView = [[UIImageView alloc] initWithFrame:_contentView.bounds];
//中间位置-- 固定
_centerImageView.left = _leftImageView.right;
_centerImageView.userInteractionEnabled = YES;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(carouselTapAction:)];
//添加轻按手势 --- 只有中间显示图片有, 其他两张不能点击
[_centerImageView addGestureRecognizer:tap];
// _centerImageView.backgroundColor = MHCustomColor;
[_contentView addSubview:_centerImageView];
self.rightImageView = [[UIImageView alloc] initWithFrame:_contentView.bounds];
//屏幕右边位置 --固定
_rightImageView.left = _centerImageView.right;
// _rightImageView.backgroundColor = MHCustomColor;
[_contentView addSubview:_rightImageView];
self.pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(10, self.height - 25, self.width - 20, 15)];
_pageControl.tintColor = [UIColor whiteColor];
[self addSubview:_pageControl];
_contentView.contentOffset = CGPointMake(_leftImageView.right, 0);
}
/**
手势关联方法 -- 调用block回调, 传出点击的图片下标
@param tap 图片轻按手势
*/
- (void)carouselTapAction:(UITapGestureRecognizer *)tap
{
if (self.selectCarouselImageBlock) {
self.selectCarouselImageBlock(_pageIndex);
}
}
/**
设置图片数组
@param imagesAry 图片名称数组
*/
- (void)setImagesAry:(NSArray *)imagesAry
{
_imagesAry = imagesAry;
_pageIndex = 0;
if (_imagesAry.count > 1) {
//不是一张图片 -- 添加定时器
[self addTimer];
_pageControl.numberOfPages = imagesAry.count;
_leftImageView.image = [UIImage imageNamed:[imagesAry lastObject]];
//显示第一张图片
_centerImageView.image = [UIImage imageNamed:imagesAry[0]];
_rightImageView.image = [UIImage imageNamed:imagesAry[1]];
_contentView.scrollEnabled = YES;
_contentView.contentOffset = CGPointMake(_leftImageView.right, 0);
}else
{
//如果是只有一张, 不能滚动
_centerImageView.image = [UIImage imageNamed:imagesAry[0]];
_contentView.scrollEnabled = NO;
}
}
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
//拖拽的时候, 定时器暂时关闭
[self.aTimer invalidate];
}
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
//拖拽结束, 定时器重新添加
[self addTimer];
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
//判断是否是向后滑动
if (_contentView.contentOffset.x > _contentView.width * 1.5) {
//判断当前显示图片是不是最后一张
if (_pageIndex == _imagesAry.count - 1) {
_leftImageView.image = [UIImage imageNamed:_imagesAry[_imagesAry.count - 1]];
_centerImageView.image = [UIImage imageNamed:_imagesAry[0]];
_rightImageView.image = [UIImage imageNamed:_imagesAry[1]];
_pageIndex = 0;
}else
{
_leftImageView.image = [UIImage imageNamed:_imagesAry[_pageIndex]];
_centerImageView.image = [UIImage imageNamed:_imagesAry[_pageIndex + 1]];
_rightImageView.image = [UIImage imageNamed:_pageIndex + 1 == _imagesAry.count - 1 ? _imagesAry[0] : _imagesAry[_pageIndex + 2]];
_pageIndex += 1;
}
}else if (_contentView.contentOffset.x < _contentView.width * 0.5)
{
if (_pageIndex == 0) {
_leftImageView.image = [UIImage imageNamed:_imagesAry.count - 1 == 0 ? _imagesAry[_imagesAry.count - 1] : _imagesAry[_imagesAry.count - 2]];
_centerImageView.image = [UIImage imageNamed:_imagesAry[_imagesAry.count - 1]];
_rightImageView.image = [UIImage imageNamed:_imagesAry[0]];
_pageIndex = (int)_imagesAry.count - 1;
}else
{
_leftImageView.image = [UIImage imageNamed: _pageIndex - 1 == 0 ? _imagesAry[_imagesAry.count - 1] : _imagesAry[_pageIndex - 2]];
_centerImageView.image = [UIImage imageNamed:_imagesAry[_pageIndex - 1]];
_rightImageView.image = [UIImage imageNamed:_imagesAry[_pageIndex]];
_pageIndex -= 1;
}
}
_pageControl.currentPage = _pageIndex;
//图片替换完成后, 返回到中间位置
_contentView.contentOffset = CGPointMake(_leftImageView.right, 0);
}
/** 添加定时器 */
- (void)addTimer
{
if (![self.aTimer isValid]) {
NSTimer *timer = [NSTimer timerWithTimeInterval:4.0f target:self selector:@selector(nextPage) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
self.aTimer = timer;
}
}
- (void)nextPage
{
[UIView animateWithDuration:0.5 animations:^{
_contentView.contentOffset = CGPointMake(_centerImageView.right, 0);
} completion:^(BOOL finished) {
if (_pageIndex == _imagesAry.count - 1) {
_leftImageView.image = [UIImage imageNamed:_imagesAry[_imagesAry.count - 1]];
_centerImageView.image = [UIImage imageNamed:_imagesAry[0]];
_rightImageView.image = [UIImage imageNamed:_imagesAry[1]];
_pageIndex = 0;
}else
{
_leftImageView.image = [UIImage imageNamed:_imagesAry[_pageIndex]];
_centerImageView.image = [UIImage imageNamed:_imagesAry[_pageIndex + 1]];
_rightImageView.image = [UIImage imageNamed:_pageIndex + 1 == _imagesAry.count - 1 ? _imagesAry[0] : _imagesAry[_pageIndex + 2]];
_pageIndex += 1;
}
_pageControl.currentPage = _pageIndex;
_contentView.contentOffset = CGPointMake(_leftImageView.right, 0);
}];
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
@end
#import/**
主页面轮播图
*/
@interface CLLCarouselView : UIView
/**
图片数组, 传图片的名称数组
*/
@property (nonatomic, copy)NSArray * imagesAry;
/**
点击图片回调block -- index图片下标
*/
@property(nonatomic, copy)void(^selectCarouselImageBlock)(NSInteger index);
@end
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