ScrollView content attribution 捲到底才執行

所以我們可以在ScrollViewDelegate中降子判斷

#pragma --mark UIScrollViewDelegate

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

    float bottomOffset = scrollView.contentSize.height - (scrollView.bounds.size.height -scrollView.contentInset.bottom);

    NSLog(@"bottom(%f) = scrollView.contentSize.height(%f) - (scrollView.bounds.size.height(%f) -scrollView.contentInset.bottom(%f))",bottomOffset,scrollView.contentSize.height, scrollView.bounds.size.height, scrollView.contentInset.bottom);

    //捲到底才執行

    if ( scrollView.contentOffset.y == bottomOffset )

    {

        //TODO:...

    }

}