Swift 4中的iOS UIKit：将附件应用于UIView

预习

资源

项目

https://github.com/calmone/iOS-UIKit-component

参考

• UIView
  https://developer.apple.com/reference/uikit/uiview
• UIGravity行为
  https://developer.apple.com/reference/uikit/uigravitybehavior
• UIAttachment行为
  https://developer.apple.com/reference/uikit/uiattachment行为
• UIDynamicAnimator
  https://developer.apple.com/documentation/uikit/uidynamicanimator

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