在類中什么兩個屬性

@property (nonatomic,assign) BOOL isDragging;               //是否正在拖動
@property (nonatomic,strong)NSTimer *timer;                 //設(shè)置動畫

用作判斷是否在拖地和添加動畫

先創(chuàng)建scrollview

UIView  *view4Header = [[UIView alloc] initWithFrame:CGRectMake(0, 0, kWIDTH, 100)];

UIScrollView * _scrollview=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, kWIDTH, 100)];
    _scrollview.contentSize=CGSizeMake(kWIDTH*6, 100);
//    _scrollview.contentOffset = CGPointMake(0, 0);
    _scrollview.pagingEnabled=YES;
    _scrollview.delegate=self;
    _scrollview.showsHorizontalScrollIndicator = NO;
    [view4Header addSubview:_scrollview];

    _pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake((kWIDTH - 80)/2, view4Header.frame.size.height - 20, 80, 10)];
    _pageControl.numberOfPages = 4;
    _pageControl.currentPage = 0;
    [view4Header addSubview:_pageControl];
    
    //貼圖
    for (int i=0; i<6; i++) {

        int y=i + 5;
        if (i == 5) {
            y = 6;
        }else if (i == 0){
            y = 9;
        }

        UIImageView*imageView=[[UIImageView alloc]initWithFrame:CGRectMake(i*kWIDTH, 0, kWIDTH, 100)];
        imageView.image=[UIImage imageNamed:[NSString stringWithFormat:@"pic_n000%d",y]];
        [_scrollview addSubview:imageView];
    }

//  設(shè)置時鐘動畫 定時器
    self.timer = [NSTimer scheduledTimerWithTimeInterval:2.5f target:self selector:@selector(update:) userInfo:nil repeats:YES];
    //  將定時器添加到主線程
    [[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];

實(shí)現(xiàn)定時移動效果

- (void)update:(NSTimer *)timer{
    //定時移動
    
    CGPoint offSet = _scrollview.contentOffset;
    
    if (_isDragging == YES) {
        return ;
    }
    
    offSet.x = offSet.x + kWIDTH;
   
    [_scrollview setContentOffset:offSet animated:YES];
    
    if (offSet.x / kWIDTH == 5) {
        [_scrollview setContentOffset:CGPointMake(0, 0)];
    }
}

最后添加上ScrollView的代理方法摧茴，使其可以滑動拖動

#pragma mark - UIScrollViewDelegate
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    _isDragging = YES;
}
//  停止?jié)L動
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    float offset = _scrollview.contentOffset.x;
    
    if (offset > kWIDTH*4) {
        [_scrollview setContentOffset:CGPointMake(kWIDTH, 0)];
    }

    if (offset < kWIDTH) {
        [_scrollview setContentOffset:CGPointMake(4*kWIDTH, 0)];
    }
    _isDragging = NO;
}