DAExpandAnimation 是一个自定义的模式切换，提供一个有拉伸效果的控件。

Usage

Try the example project!

Have your view controller conform to UIViewControllerTransitioningDelegate. Optionally set thecollapsedViewFrame, theexpandedViewFrameand theanimationDuration.

private let animationController = DAExpandAnimation()    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {      if let toViewController = segue.destinationViewController as? UIViewController, selectedCell = sender as? UITableViewCell {          toViewController.transitioningDelegate = self          toViewController.modalPresentationStyle = .Custom          toViewController.view.backgroundColor = selectedCell.backgroundColor            animationController.collapsedViewFrame = {              return selectedCell.frame          }          animationController.animationDuration = Constants.SomeAnimationDuration            if let indexPath = tableView.indexPathForCell(selectedCell) {              tableView.deselectRowAtIndexPath(indexPath, animated: false)          }      }  }    func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {      return animationController  }    func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {      return animationController  }

项目主页：http://www.open-open.com/lib/view/home/1441786766258