UIScrollView做引导页，滚动到最后一页，继续滚动，，处理。。

- (void) scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    int index = fabs(_theScrollView.contentOffset.x)/self.view.frame.size.width;
    if(_lastPageIndex == index) {
        _lastPageIndex++;
    } else{
        _lastPageIndex = index;
    }
    if (_lastPageIndex>index){
　　　　//在这里，就是已经在最后一页，继续滚动，则触发你想要的事件。 其实只是add了一个小小的 int。 
    }
}

　　下面是scrollview初始化：

    _theScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 0.0, self.view.frame.size.width, self.view.frame.size.height)];
    _theScrollView.userInteractionEnabled = YES;
    _theScrollView.directionalLockEnabled = YES;
    _theScrollView.pagingEnabled = YES;
    _theScrollView.showsVerticalScrollIndicator = NO;
    _theScrollView.showsHorizontalScrollIndicator = NO;
    _theScrollView.delegate = self;
    _theScrollView.contentSize = CGSizeMake(self.view.frame.size.width*5, self.view.frame.size.height);