ScrollView定时器复用

起始偏移量设置为一个宽度

        [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(refreshPic) userInfo:nil repeats:YES];

//定时器实现

- (void)refreshPic{

    if (_mainScrollView.contentOffset.x/_mainScrollView.frame.size.width==4) {

        _mainScrollView.contentOffset = CGPointMake(0, 0);

    }

        [_mainScrollView setContentOffset:CGPointMake(_mainScrollView.frame.size.width+_mainScrollView.contentOffset.x, 0) animated:YES];

    self.pageCor.currentPage = _mainScrollView.contentOffset.x/_mainScrollView.frame.size.width;

}

//手动拖拽实现

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

    if (_mainScrollView.contentOffset.x/_mainScrollView.frame.size.width == 5) {

        _mainScrollView.contentOffset = CGPointMake(_mainScrollView.frame.size.width, 0);

        self.pageCor.currentPage = 0;

    }else if (_mainScrollView.contentOffset.x/_mainScrollView.frame.size.width==0){

        _mainScrollView.contentOffset = CGPointMake(_mainScrollView.frame.size.width*4, 0);

        self.pageCor.currentPage = 3;

    }else{

        self.pageCor.currentPage = _mainScrollView.contentOffset.x/_mainScrollView.frame.size.width-1;

    }

//定时器触碰停止,3秒后自动启动

- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{

    _timer.fireDate = [NSDate dateWithTimeIntervalSinceNow:3];

}

}

ScrollView定时器复用

原文：http://www.cnblogs.com/block123/p/4912383.html