# UIScrollViewDelegate & UITableViewDelegate 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)` 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)` 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)` 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)` Tells the delegate when dragging ended in the scroll view. 當手指離開螢幕後觸發 ### `func scrollViewShouldScrollToTop(UIScrollView) -> Bool` Asks 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)` 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)` 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)` 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)` 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)` 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)` 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)` Tells the delegate when dragging ended in the scroll view. 當手指離開螢幕後觸發 ### `func scrollViewShouldScrollToTop(UIScrollView) -> Bool` Asks 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)` 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)` 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)` Tells the delegate that the scroll view has ended decelerating the scrolling movement. 當快速滑動停下來時觸發