我正在尝试创建一个具有 TabBarViewController 和 4 个选项卡的演示应用程序(情节提要上有 4 个不同的 ViewControllers)
在第一个 ViewController 的第一个选项卡上,我有一个 collectionView,其中包含具有 ImageView 和少量标签的单元格。
我要做的是,当您单击一个单元格时,它会扩展到整个屏幕,并且视图仍然停留在选项卡栏的第一个选项卡中,刚才 ViewController 内的视图已更改为新的视图是所选单元格的展开视图,当您向下滚动时,集合视图会继续,您可以单击另一个单元格并展开等等...同时您可以随时按下并显示在视图中展开的最后一个单元格
我希望我对我正在尝试做的事情足够清楚。现在生病添加我已经拥有的代码
import UIKit
class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
var imagesArray = []
var imageSizes = [CGSize]()
var labelsArray = [""]
var descArray = [""]
@IBOutlet weak var collectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
self.collectionView.delegate = self
self.collectionView.dataSource = self
for i in 0..<imagesArray.count {
let currImg = imagesArray[i]
let currHeight = currImg.size.height
let currSize = CGSize(width: 150, height: currHeight + 125)
imageSizes.append(currSize)
}
}
public func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return imagesArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CollectionVCe
cell.cellImg.image = imagesArray[indexPath.row]
cell.descLabel.text = descArray[1]
cell.itemLabel.text = labelsArray[0]
cell.cellImg.contentMode = .scaleAspectFill
cell.layer.cornerRadius = 9
cell.backgroundColor = UIColor.red
cell.cellImg.backgroundColor = UIColor.blue
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return imageSizes[indexPath.row]
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsetsMake(0, 25, 0, 25)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 10
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if let cell = collectionView.cellForItem(at: indexPath) {
cell.frame = collectionView.frame
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}