爲了上下滾動UIScrollView的委託方法我要打電話去那兩個方法我用下面的方法。我現在用滾動視圖的委託方法爲UICollection
因爲它是UIScrollView
。這裏的子視圖是我寫的代碼,但是滾動不容易移動,並且結果也不準確,有時可以有人建議。不是要求正確
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
CGPoint mScrollPosition = [scrollView.panGestureRecognizer velocityInView:mCollectionView];
if (mScrollPosition.y > 0.0f){
NSLog(@"going down");
//Action One
mYearHeaderTitle--;
[self.mCollectionView reloadData];
}
else if (mScrollPosition.y < 0.0f){
NSLog(@"going up");
//Action two
mYearHeaderTitle++;
[self.mCollectionView reloadData];
}
}
你鏈接委託滾動視圖一樣,scroll.delegate =自我; –