问Swift:当一个视图转换到另一个视图时的动画效果

EN

  [UIView transitionWithView:textFieldimageView
                      duration:0.5f
                       options:UIViewAnimationOptionTransitionCrossDissolve
                    animations:^{
                        imageView.oldImage = newImage;
                    } completion:NULL];

UIView.transitionWithView(self.view, duration: 0.5, options: UIViewAnimationOptions.TransitionCrossDissolve, animations: {
    }, completion: { (fininshed: Bool) -> () in
    })

UIView.transition(with: self.view, duration: 0.5, options: UIView.AnimationOptions.transitionCrossDissolve, animations: {
}, completion: { (fininshed: Bool) -> () in
})