День добрый
Создаю свой Tabbar
И столкнулся с проблемой в изменение размеров ячеек ( Они дергаются 
)
Как можно сделать это все плавно? ( на se еще заметнее )
И view - которая катается - как можно ей плавно поменять размер?
Видео
Вот код:
class TabBarView: UIView, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource, UICollectionViewDelegate {
private let tabBarImages = ["Images1", "Images4", "Images3", "Images2"]
private let nameCell = ["Home", "Favorite", "History", "Setting"]
var imageCircleView = UIImageView()
let nameCellLabel = UILabel()
lazy var collectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout.init()
layout.scrollDirection = .horizontal
layout.minimumLineSpacing = 0
layout.minimumInteritemSpacing = 0
let frame = CGRect(x: 0, y: UIScreen.main.bounds.height - 63, width: UIScreen.main.bounds.width, height: 63)
let collectionView = UICollectionView(frame: frame, collectionViewLayout: UICollectionViewFlowLayout.init())
collectionView.setCollectionViewLayout(layout, animated: true)
collectionView.delegate = self
collectionView.dataSource = self
collectionView.register(TabBarCellCollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
collectionView.backgroundColor = .clear
return collectionView
}()
lazy var viewSlide: UIView! = {
let view = UIView()
return view
}()
lazy var circleView: UIView! = {
let view = UIView()
return view
}()
var selectedIndex = 0
var bigCell: CGFloat! = 0
var smileCell: CGFloat! = 0
//
func setup() {
backgroundColor = #colorLiteral(red: 0.2588235438, green: 0.7568627596, blue: 0.9686274529, alpha: 1)
let backgroundView = UIView(frame: UIScreen.main.bounds)
backgroundView.backgroundColor = UIColor(white: 1, alpha: 0.1)
insertSubview(backgroundView, at: 0)
configureCollectionView()
configureViewCell()
configureCircleView()
configureImageCircleView()
configureNameCellLabel()
}
func configureCollectionView() {
addSubview(collectionView)
collectionView.translatesAutoresizingMaskIntoConstraints = false
collectionView.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
collectionView.heightAnchor.constraint(equalToConstant: 63).isActive = true
collectionView.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
collectionView.topAnchor.constraint(equalTo: topAnchor).isActive = true
}
func configureViewCell() {
viewSlide.backgroundColor = .clear
insertSubview(viewSlide, at: 2)
viewSlide.translatesAutoresizingMaskIntoConstraints = false
viewSlide.leadingAnchor.constraint(equalTo: collectionView.leadingAnchor).isActive = true
viewSlide.topAnchor.constraint(equalTo: collectionView.topAnchor).isActive = true
viewSlide.bottomAnchor.constraint(equalTo: collectionView.bottomAnchor).isActive = true
}
func configureCircleView() {
circleView.translatesAutoresizingMaskIntoConstraints = false
viewSlide.addSubview(circleView)
circleView.leadingAnchor.constraint(equalTo: viewSlide.leadingAnchor, constant: 6).isActive = true
circleView.topAnchor.constraint(equalTo: viewSlide.topAnchor, constant: 8).isActive = true
circleView.trailingAnchor.constraint(equalTo: viewSlide.trailingAnchor, constant: -6).isActive = true
circleView.bottomAnchor.constraint(equalTo: viewSlide.bottomAnchor, constant: -8).isActive = true
circleView.backgroundColor = #colorLiteral(red: 0.3647058904, green: 0.06666667014, blue: 0.9686274529, alpha: 1)
DispatchQueue.main.async {
self.circleView.layer.cornerRadius = self.circleView.frame.height / 2
self.circleView.layer.masksToBounds = true
}
}
func configureNameCellLabel() {
nameCellLabel.translatesAutoresizingMaskIntoConstraints = false
circleView.addSubview(nameCellLabel)
nameCellLabel.leadingAnchor.constraint(equalTo: imageCircleView.trailingAnchor, constant: 4).isActive = true
nameCellLabel.trailingAnchor.constraint(equalTo: circleView.trailingAnchor, constant: -8).isActive = true
nameCellLabel.centerYAnchor.constraint(equalTo: circleView.centerYAnchor).isActive = true
nameCellLabel.alpha = 0
nameCellLabel.textColor = .white
nameCellLabel.font = UIFont.systemFont(ofSize: 14)
nameCellLabel.sizeToFit()
nameCellLabel.adjustsFontSizeToFitWidth = false
nameCellLabel.text = self.nameCell[self.selectedIndex]
nameCellLabel.alpha = 1
}
func configureImageCircleView() {
imageCircleView.translatesAutoresizingMaskIntoConstraints = false
circleView.addSubview(imageCircleView)
imageCircleView.leadingAnchor.constraint(equalTo: circleView.leadingAnchor, constant: 2).isActive = true
imageCircleView.topAnchor.constraint(equalTo: viewSlide.topAnchor, constant: 12).isActive = true
imageCircleView.widthAnchor.constraint(equalToConstant: collectionView.bounds.height - 22).isActive = true
imageCircleView.bottomAnchor.constraint(equalTo: viewSlide.bottomAnchor, constant: -10).isActive = true
imageCircleView.contentMode = .scaleAspectFit
let imageName = tabBarImages[self.selectedIndex]
imageCircleView.image = UIImage(named: imageName)
DispatchQueue.main.async {
let frame = UIScreen.main.bounds.width - self.viewSlide.bounds.width
self.smileCell = frame / 3
self.collectionView.reloadData()
}
}
override func layoutSubviews() {
}
//MARK: CollectionView
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return tabBarImages.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! TabBarCellCollectionViewCell
let imageName = self.tabBarImages[indexPath.row]
cell.imageCell.image = UIImage.init(named: imageName)
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
if selectedIndex != indexPath.row {
return CGSize(width: smileCell, height: 63)
} else {
return CGSize(width: viewSlide.bounds.width, height: 63)
}
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if selectedIndex != indexPath.row {
imageCircleView.image = UIImage(named: tabBarImages[indexPath.row])
nameCellLabel.text = nameCell[indexPath.row]
let cell = collectionView.cellForItem(at: indexPath) as? TabBarCellCollectionViewCell
cell?.animateCell()
selectedIndex = indexPath.row
NotificationCenter.default.post(name: Notification.Name.init(rawValue: "didSelectMenu"), object: nil, userInfo: ["index": selectedIndex])
let frame = UIScreen.main.bounds.width - self.viewSlide.bounds.width
self.smileCell = frame / 3
self.newFrame(indexPath: indexPath.row)
}
}
var xPosition: CGFloat = 0
func position(indexPath: Int) {
let step = smileCell
switch indexPath {
case 0:
xPosition = 0
case 1:
xPosition = step!
case 2:
xPosition = step! + step!
case 3:
xPosition = step! + step! + step!
default:
break
}
UIView.animate(withDuration: 0.5, animations: {
self.viewSlide.transform = CGAffineTransform(translationX: self.xPosition, y: 0)
self.collectionView.performBatchUpdates({
self.collectionView.reloadData()
}, completion: nil)
}) { (_) in
let cell = self.collectionView.cellForItem(at: IndexPath(row: self.selectedIndex, section: 0)) as? TabBarCellCollectionViewCell
cell?.showCell()
}
}
func newFrame(indexPath: Int) {
UIView.animate(withDuration: 0.001, animations: {
}) { (_) in
let frame = UIScreen.main.bounds.width - self.viewSlide.bounds.width
self.smileCell = frame / 3
self.position(indexPath: indexPath)
}
}
override func awakeFromNib() {
super.awakeFromNib()
setup()
}
deinit {
NotificationCenter.default.removeObserver(self)
}
}
class TabBarCellCollectionViewCell: UICollectionViewCell {
var imageCell = UIImageView()
override func draw(_ rect: CGRect) {
}
override init(frame: CGRect) {
super.init(frame: frame)
configureImageCell()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func awakeFromNib() {
super.awakeFromNib()
contentView.frame.size = CGSize(width: UIScreen.main.bounds.width, height: 63)
configureImageCell()
backgroundColor = .clear
contentView.backgroundColor = .clear
}
func animateCell() {
UIView.animate(withDuration: 0.002, animations: {
self.imageCell.alpha = 0
}) { (_) in
}
}
func showCell() {
UIView.animate(withDuration: 0.3, animations: {
self.imageCell.alpha = 1
}) { (_) in
}
}
func configureImageCell() {
imageCell.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(imageCell)
// icon.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 7).isActive = true
// icon.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 8).isActive = true
imageCell.centerXAnchor.constraint(equalTo: contentView.centerXAnchor).isActive = true
imageCell.centerYAnchor.constraint(equalTo: contentView.centerYAnchor).isActive = true
imageCell.widthAnchor.constraint(equalToConstant: contentView.bounds.height - 16).isActive = true
imageCell.heightAnchor.constraint(equalToConstant: contentView.bounds.height - 16).isActive = true
imageCell.contentMode = .scaleAspectFit
}
}