UIScrollViewDelegate & UITableViewDelegate
針對 UIScrollView 和 UITableView 主要的各種 delegate 發動時機，做說明
UIScrollViewDelegate protocol聲明的方法允許採用的委託 UIScrollView，從而響應並在一定程度上影響諸如滾動，縮放，滾動內容的減速和滾動動畫之類的操作，任何繼承 UIScrollView 都可使用。
Responding to Scrolling and Dragging
func scrollViewDidScroll(UIScrollView)
func scrollViewDidScroll(UIScrollView)Tells the delegate when the user scrolls the content view within the receiver.
當有發生任何滑動時都會觸發
func scrollViewWillBeginDragging(UIScrollView)
func scrollViewWillBeginDragging(UIScrollView)Tells the delegate when the scroll view is about to start scrolling the content.
當手指碰觸到螢幕，並且開始滑動前時觸發
func scrollViewWillEndDragging(UIScrollView, withVelocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>)
func scrollViewWillEndDragging(UIScrollView, withVelocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>)Tells the delegate when the user finishes scrolling the content.
當手指離開螢幕前觸發
func scrollViewDidEndDragging(UIScrollView, willDecelerate: Bool)
func scrollViewDidEndDragging(UIScrollView, willDecelerate: Bool)Tells the delegate when dragging ended in the scroll view.
當手指離開螢幕後觸發
func scrollViewShouldScrollToTop(UIScrollView) -> Bool
func scrollViewShouldScrollToTop(UIScrollView) -> BoolAsks the delegate if the scroll view should scroll to the top of the content.
當點擊 status bar 的時間滑動前觸發
回傳 true 開啟點擊 status bar 的時間可以 scroll 到頂部
func scrollViewDidScrollToTop(UIScrollView)
func scrollViewDidScrollToTop(UIScrollView)Tells the delegate that the scroll view scrolled to the top of the content.
當點擊完 status bar 的時間並且滑動到頂部後觸發
func scrollViewWillBeginDecelerating(UIScrollView)
func scrollViewWillBeginDecelerating(UIScrollView)Tells the delegate that the scroll view is starting to decelerate the scrolling movement.
當快速滑動準備停止時觸發
func scrollViewDidEndDecelerating(UIScrollView)
func scrollViewDidEndDecelerating(UIScrollView)Tells the delegate that the scroll view has ended decelerating the scrolling movement.
當快速滑動停下來時觸發
UIScrollViewDelegate protocol聲明的方法允許採用的委託 UIScrollView，從而響應並在一定程度上影響諸如滾動，縮放，滾動內容的減速和滾動動畫之類的操作，任何繼承 UIScrollView 都可使用。
Responding to Scrolling and Dragging
func scrollViewDidScroll(UIScrollView)
func scrollViewDidScroll(UIScrollView)Tells the delegate when the user scrolls the content view within the receiver.
當有發生任何滑動時都會觸發
func scrollViewWillBeginDragging(UIScrollView)
func scrollViewWillBeginDragging(UIScrollView)Tells the delegate when the scroll view is about to start scrolling the content.
當手指碰觸到螢幕，並且開始滑動前時觸發
func scrollViewWillEndDragging(UIScrollView, withVelocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>)
func scrollViewWillEndDragging(UIScrollView, withVelocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>)Tells the delegate when the user finishes scrolling the content.
當手指離開螢幕前觸發
func scrollViewDidEndDragging(UIScrollView, willDecelerate: Bool)
func scrollViewDidEndDragging(UIScrollView, willDecelerate: Bool)Tells the delegate when dragging ended in the scroll view.
當手指離開螢幕後觸發
func scrollViewShouldScrollToTop(UIScrollView) -> Bool
func scrollViewShouldScrollToTop(UIScrollView) -> BoolAsks the delegate if the scroll view should scroll to the top of the content.
當點擊 status bar 的時間滑動前觸發
回傳 true 開啟點擊 status bar 的時間可以 scroll 到頂部
func scrollViewDidScrollToTop(UIScrollView)
func scrollViewDidScrollToTop(UIScrollView)Tells the delegate that the scroll view scrolled to the top of the content.
當點擊完 status bar 的時間並且滑動到頂部後觸發
func scrollViewWillBeginDecelerating(UIScrollView)
func scrollViewWillBeginDecelerating(UIScrollView)Tells the delegate that the scroll view is starting to decelerate the scrolling movement.
當開始加速滑動時觸發
func scrollViewDidEndDecelerating(UIScrollView)
func scrollViewDidEndDecelerating(UIScrollView)Tells the delegate that the scroll view has ended decelerating the scrolling movement.
當快速滑動停下來時觸發
Last updated
Was this helpful?