HomePageViewController

– (void)createScrollView

{

_imageArray = @[@"img_head1",@"img_head2",@"img_head3"];

_circulationView  = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 320, 130)];
_circulationView.frame = [ToolViewAndData MyAutoLayout:_circulationView];
_circulationView.delegate = self;
_circulationView.showsHorizontalScrollIndicator = NO;
[self.view addSubview:_circulationView];

CGFloat imageW = _circulationView.frame.size.width;
CGFloat imageH = _circulationView.frame.size.height;

_circulationView.contentSize = CGSizeMake(imageW *_imageArray.count, 0);
for (int i =0; i<_imageArray.count; i++) {

    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(i *imageW, 0, imageW, imageH)];
    imageView.image = [UIImage imageNamed:_imageArray[i]];

    [_circulationView addSubview:imageView];
}

_circulationView.pagingEnabled = YES;

_pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(120, 100, 80, 30)];
_pageControl.frame = [ToolViewAndData MyAutoLayout:_pageControl];
_pageControl.currentPage = 0;
_pageControl.numberOfPages = _imageArray.count;
[self.view addSubview:_pageControl];
[_pageControl addTarget:self action:@selector(changePageClick:) forControlEvents:UIControlEventValueChanged];

[self addTimer];

}

pragma mark ——-点击pagecontroll

–(void)changePageClick:(UIPageControl *)sender

{

int page = (int)_pageControl.currentPage;

CGFloat x = page * _circulationView.frame.size.width;
_circulationView.contentOffset = CGPointMake(x, 0);

}

pragma mark —– ScrollView滚动的时候调用

– (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

CGFloat scrollViewW = scrollView.frame.size.width;

CGFloat x = scrollView.contentOffset.x;

int page = (x +scrollViewW/2) / scrollViewW;

_pageControl.currentPage = page;

}

pragma mark —— 开始拖拽的时候调用

–(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

{

[self removeTimer];

}

pragma mark ——- 关闭定时器

– (void)removeTimer

{

[_timer invalidate];

}

–(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate

{

[self addTimer];

}

pragma mark —-开启定时器

– (void)addTimer

{

_timer = [NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(nextImage) userInfo:nil repeats:YES];

[[NSRunLoop currentRunLoop]addTimer:_timer forMode:NSRunLoopCommonModes];

}

pragma mark —— 定时器滚动图片

–(void)nextImage

{

int page = (int)_pageControl.currentPage;

if (page == _imageArray.count -1) {

page = 0;

}

else

{

page ++;

}

CGFloat x = page * _circulationView.frame.size.width;
_circulationView.contentOffset = CGPointMake(x, 0);

}