Scroller主要用于平滑滚动,主要使用的滚动方法有:startScroll.fling. startScroll(int startX, int startY, int dx, int dy, int duration): 指定起点(startX,startY),从起点平滑变化(dx,dy),耗时duration,通常用于:知道起点与需要改变的距离的平滑滚动等. fling(int startX, int startY, int velocityX, int velocityY, …
相关知识: https://blog.csdn.net/BUG_delete/article/details/103699563 'AppDelegate' is only available in iOS 13.0 or newer The correct code is let appDelegate:AppDelegate = UIApplication.shared.delegate as! AppDelegate add @UIApplicationMain this as well.…