Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
如何用动画打开 UIPickerView(从下到上)
将初始位置设置在屏幕下方。当你想要它时,只需将它动画到最终位置。基本上:
UIView beginAnimations 将选取器视图框架设置为屏幕上的新位置 UOIView commitAnimations