我正在开发一个应用程序没有故事板/ xibs,这被证明是一个挑战。我有一个UICollectionView
(广告),用户可以点击单元格导航到新的视图控制器,以显示该广告的详细信息。下面是我遇到的错误的gif。导航视图控制器之间没有故事板/ xibs
正如你所看到的,UICollectionView
那种粘我点击细胞后周围的人。我在我的AdsViewController
子类adDetailsViewController
属性,当我点击细胞代码执行:
adDetailsViewController.adTitle = adTitles[indexPath.row]
navigationController?.pushViewController(adDetailsViewController, animated: true)
下面是生命周期方法(目前只是viewDidLoad
)adDetailsViewController
:
class AdDetailsViewController: UIViewController {
var adTitle: String?
override func viewDidLoad() {
super.viewDidLoad()
let label = UILabel(frame: view.bounds)
label.textAlignment = .center
label.center = view.center
label.text = adTitle
view.addSubview(label)
}
}
为了完整,这里是其余的AdsViewController
:
class AdsViewController: UIViewController {
lazy var collectionView: AdsCollectionView = {
let collectionView = AdsCollectionView(frame: view.frame, collectionViewLayout: TiledFlowLayout())
collectionView.delegate = self
collectionView.dataSource = self
collectionView.register(AdCollectionViewCell.self, forCellWithReuseIdentifier: "AdCell")
view.addSubview(collectionView)
return collectionView
}()
let adDetailsViewController = AdDetailsViewController()
let adTitles = ["1", "2", "3", "4", "5", "6"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
collectionView.translatesAutoresizingMaskIntoConstraints = false
collectionView.topAnchor.constraint(equalTo: view.topAnchor, constant: 8).isActive = true
collectionView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 0).isActive = true
collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0).isActive = true
collectionView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: 0).isActive = true
view.backgroundColor = .white
}
}
extension AdsViewController: UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return adTitles.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "AdCell", for: indexPath) as! AdCollectionViewCell
cell.textLabel.text = adTitles[indexPath.row]
return cell
}
}
extension AdsViewController: UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
adDetailsViewController.adTitle = adTitles[indexPath.row]
navigationController?.pushViewController(adDetailsViewController, animated: true)
}
}
extension AdsViewController: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: (self.view.frame.size.width/2) - 10, height: self.view.frame.size.height/4)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
}
}
发生这种情况是因为您正在动画“ViewControllers”的更改。如果你将'animated:'参数设置为'false',那么如果这是你想达到的目标,那么改变将是即时的。 –
我想要点击单元格时发生正常的转换,即新的视图控制器在其上滑动。我不希望它立即发生。 – eirikvaa
请添加UIViewController的生命周期方法adDetailsViewController – Sander