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swift: animation with buttons

I use this code to create animation with button:

func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath)

switch indexPath.section
case 0:
self.button1.constant = self.button2.constant
case 6:
self.button3.constant = self.button4.constant
default:
self.button1.constant = 0
self.button3.constant = 0


UIView.animate(withDuration: 1.0, delay: 0.0,
options: , animations:
self.view.layoutIfNeeded()
)



I have collectionView. But with my buttons my collectionView animated too. How to do that I have animation only with button?

collectionView

collectionView

This code doesn't work:

UIView.animate(withDuration: 1.0, delay: 0.0,
options: , animations:
self.myButton.layoutIfNeeded()
self.myButton1.layoutIfNeeded()
)


animations:

3 Answers
3

func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath)

UIView.animate(withDuration: 1.0, delay: 0.0,
options: , animations:

switch indexPath.section
case 0:
self.button1.constant = self.button2.constant
self.myButton1.layoutIfNeeded()
case 6:
self.button3.constant = self.button4.constant
self.myButton3.layoutIfNeeded()
default:
self.button1.constant = 0
self.button3.constant = 0

self.myButton1.layoutIfNeeded()
self.myButton6.layoutIfNeeded()


)



Try to subclass UICollectionView and override layoutSubviews method as below:

UICollectionView

layoutSubviews

override func layoutSubviews()
UIView.performWithoutAnimation
super.layoutSubviews()




Hope this helps.

I confirmed this code working.

func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath)
guard let cell = cell as? MyCollectionViewCell else return

cell.yourConstraint.constant = 10 //desired value

UIView.animate(withDuration: 0.3)
cell.layoutIfNeeded()




I think your problem is that your constraints called 'button1', button2' and so on are hooked to your view controller's view or the collectionView.

You have to set up the constraint between the button(assumably inside the collection view cell) and the collection view cell's contentView, AND have that constraint property in the custom UICollectionViewCell class.

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