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];

}

}