百度云地址链接 #密码:3noo

需要调用的页面

#import "ViewController.h"
#import "SeliceInfininiteScrolloView.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //实现调用方法 将图片数组传入
    SeliceInfininiteScrolloView *scrollowView =  [[SeliceInfininiteScrolloView alloc]initWithFrame:CGRectMake(0, 20, self.view.frame.size.width, 200)];
    scrollowView.imageArray  = @[@"1.png",@"2.png",@"3.png",@"4.png",@"5.png",@"6.png"];
    [self.view addSubview:scrollowView];
}

@end

自定义方法 SeliceInfininiteScrolloView.h

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface SeliceInfininiteScrolloView : UIView
@property(nonatomic,strong) NSArray * imageArray;//图片数组


@end

NS_ASSUME_NONNULL_END

自定义方法 SeliceInfininiteScrolloView.m

#import "SeliceInfininiteScrolloView.h"

@interface SeliceInfininiteScrolloView()<UIScrollViewDelegate>{
    
    UIScrollView    *MainScrollowView;
    UIImageView     *leftImageView;
    UIImageView     *MidImageView;
    UIImageView     *RightImageView;
    NSTimer         *timer;
    UIPageControl   *pageControl;
    NSInteger       currentIndex;
    NSInteger       count;
    
}

@end



@implementation SeliceInfininiteScrolloView

static const int viewNumber  =  3;


- (instancetype)initWithFrame:(CGRect)frame{
    
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = [UIColor whiteColor];
        currentIndex = 0;
    }
    
    return self;
}

-(void)setImageArray:(NSArray *)imageArray{
    
    _imageArray = imageArray;
    count       = imageArray.count;

    //    新建UIScrollowView
    [self creatScrollowView];
    //    新建定时器
    [self creatTimer];
    //    新建UIPageControl
    [self creatPagecontrol];
    
}


#pragma mark  新建UIScrollowView
-(void)creatScrollowView{

    //  当你滑动的时候，不滑动出scrollowView的时候 那么是不是就不会出现红色背景
    MainScrollowView = [[UIScrollView alloc]initWithFrame:self.bounds];
    MainScrollowView.pagingEnabled = YES;
    //   背景颜色的出现，本质是：滑动过界了，超过了scrollowView的contentsize所以才会出现背景色
    MainScrollowView.bounces = NO;
    
    MainScrollowView.backgroundColor = [UIColor redColor];
    MainScrollowView.showsVerticalScrollIndicator = NO;
    MainScrollowView.showsHorizontalScrollIndicator = NO;
    MainScrollowView.delegate = self;
    MainScrollowView.contentSize = CGSizeMake(viewNumber*self.frame.size.width, self.frame.size.height);
    [self addSubview:MainScrollowView];
    
//   添加图片
    leftImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
    leftImageView.image = [UIImage imageNamed:_imageArray[count-1]];
    
    
    MidImageView = [[UIImageView alloc]initWithFrame:CGRectMake(self.frame.size.width, 0, self.frame.size.width, self.frame.size.height)];
    MidImageView.image = [UIImage imageNamed:_imageArray[0]];

    
    RightImageView = [[UIImageView alloc]initWithFrame:CGRectMake(2*self.frame.size.width, 0, self.frame.size.width, self.frame.size.height)];
    RightImageView.image = [UIImage imageNamed:_imageArray[1]];

    [MainScrollowView addSubview:leftImageView];
    [MainScrollowView addSubview:MidImageView];
    [MainScrollowView addSubview:RightImageView];

//    刚刚开始的时候设置偏移量
    MainScrollowView.contentOffset = CGPointMake(self.frame.size.width, 0.f);
    
}

#pragma mark  新建定时器
-(void)creatTimer{
    
    __weak typeof(self)weakSelf = self;
    if (@available(iOS 10.0, *)) {
        timer = [NSTimer timerWithTimeInterval:2.f repeats:YES block:^(NSTimer * _Nonnull timer) {
            [weakSelf timerAction];
            
        }];
    } else {
        
    }
    
    [[NSRunLoop currentRunLoop]addTimer:timer forMode:NSRunLoopCommonModes];
}


-(void)timerAction{
    
    [MainScrollowView scrollRectToVisible:CGRectMake(2*self.frame.size.width, 0.f, self.frame.size.width, self.frame.size.height) animated:YES];
    
}

-(void)invalidateTimer{
    [timer invalidate];
    timer = nil;
}


#pragma mark  新建UIPageControl
-(void)creatPagecontrol{
    
    CGFloat pageControlHeight = 20.f;
    CGFloat pageControlWidth  = 80.f;
    
    pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(20, self.frame.size.height-pageControlHeight, pageControlWidth, pageControlHeight)];
    pageControl.numberOfPages   = count;
    pageControl.currentPage     = 0.f;
    pageControl.currentPageIndicatorTintColor = [UIColor yellowColor];
    [self addSubview:pageControl];
    
}


#pragma mark  UIScrollView delegate method

//手动滑动停止减速的时候调用
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    if (scrollView.contentOffset.x == 2 * self.frame.size.width) {
        //滑动到最右边时候
        currentIndex ++;
        //重置图片内容 修改偏移量
        [self resetImages];
    }else if (scrollView.contentOffset.x==0){
       
        currentIndex = currentIndex + count;
        currentIndex --;
        [self resetImages];
    }
}


//定时器滑动调用
-(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
 
    if (scrollView.contentOffset.x ==2*self.frame.size.width) {
        //滑动到最右边时候
        currentIndex ++;
        //重置图片内容 修改偏移量
        [self resetImages];
    }
}

#pragma mark  //重置图片内容 修改偏移量
-(void)resetImages{
 
    leftImageView.image  = [UIImage imageNamed:_imageArray[(currentIndex-1)%count]];
    MidImageView.image   = [UIImage imageNamed:_imageArray[(currentIndex)%count]];
    RightImageView.image = [UIImage imageNamed:_imageArray[(currentIndex+1)%count]];
    MainScrollowView.contentOffset = CGPointMake(self.frame.size.width, 0.f);
    
    pageControl.currentPage = (currentIndex)%count;//设置page控件当前位置
    
}

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
 
    //准备拖动的时候，定时器失效
    [self invalidateTimer];
    
}

-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
    
     //停止拖动的时候，定时器开启
    [self creatTimer];
}

@end