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我有一個tableview有兩個單元格和兩個嵌入式collectionviews在這些單元格內。當它試圖讓第二個單元格變形時，我的應用程序不斷崩潰。我使用了Ash Furrows教程作爲這個項目的基礎，我將在這裏鏈接。 Tutorial link如何爲集合視圖創建多個數據源？
我該如何解決這個問題？這裏是一些示例代碼。
我有兩個不同的細胞，它們各自有這個代碼
class TableViewCell: UITableViewCell {
@IBOutlet weak var collectionView: UICollectionView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func setCollectionViewDataSourceDelegate <D: UICollectionViewDataSource & UICollectionViewDelegate> (dataSourceDelegate: D, forRow row: Int) {
collectionView.delegate = dataSourceDelegate
collectionView.dataSource = dataSourceDelegate
collectionView.tag = row
collectionView.reloadData()
}
}
這自己的階級是代碼的其餘部分展示我如何出隊我的手機
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if indexPath.section == 1 {
guard let tableViewCell = cell as? TableViewCell else {
return
}
tableViewCell.setCollectionViewDataSourceDelegate(dataSourceDelegate: self, forRow: indexPath.row)
}
if indexPath.section == 2 {
guard let tableViewCell2 = cell as? TableViewCell2 else {
return
}
tableViewCell2.setCollectionViewDataSourceDelegate(dataSourceDelegate: self, forRow: indexPath.row)
}
// we store the offset from here into the dictionary we created above
//tableViewCell.collectionViewOffset = storedOffsets[indexPath.row] ?? 0
}
func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath) {
guard let tableViewCell = cell as? TableViewCell else { return }
storedOffsets[indexPath.row] = tableViewCell.collectionViewOffset
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print(indexPath)
}
}
// collectionView inside tableview cell
extension TabViewController1: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return model[collectionView.tag].count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell", for: indexPath) as? CollectionCell1 {
cell.backgroundColor = UIColor.gray
return cell
}
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell2", for: indexPath) as? CollectionCell2 {
cell.backgroundColor = UIColor.purple
return cell
}
return UICollectionViewCell()
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("Collection view at row \(collectionView.tag) selected index path \(indexPath)")
}
}
任何幫助將非常感謝！
編輯：這是整個視圖控制器類
class TabViewController1: UIViewController, UITableViewDelegate {
@IBOutlet private var tableView: UITableView!
var model: [[UIColor]] = []
// Here we create a new dictionary to store the offests, corresponding to their rows.
var storedOffsets = [Int: CGFloat]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
print("tab1")
model = generateRandomData()
tableView.delegate = self
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
print("tab 1 viewWillAppear")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func generateRandomData() -> [[UIColor]] {
let numberOfRows = 20
let numberOfItemsPerRow = 15
return (0..<numberOfRows).map { _ in
return (0..<numberOfItemsPerRow).map { _ in UIColor.randomColor() }
}
}
}
extension TabViewController1: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 5
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if section == 3 {
return 1
}
if section == 4 {
return 6
} else {
return 1
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.section == 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: "featuredPicture", for: indexPath) as! FeaturedVideoTableViewCell
return cell
}
if indexPath.section == 1 {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! TableViewCell
return cell
}
if indexPath.section == 2 {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell2", for: indexPath) as! TableViewCell2
return cell
}
if indexPath.section == 3 {
let cell = tableView.dequeueReusableCell(withIdentifier: "headerCell", for: indexPath) as! HeaderTableViewCell
return cell
}
if indexPath.section == 4 {
let cell = tableView.dequeueReusableCell(withIdentifier: "categoryCell", for: indexPath) as! CategoryTableViewCell
return cell
}
return UITableViewCell()
}
// titleForHeaderInSection doesnt get called because I implemented the bottom method which is `viewForHeaderInSection`.
// I am trying to figure out if we can use both at the same time
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
if section == 0 {
return "Featured"
}
if section == 1 {
return "Cool Stuff"
}
if section == 2 {
return "Awesome Stuff"
}
if section == 3 {
return "nothing"
}
if section == 4 {
return "Categories"
}
return String()
}
// viewForHeaderInSection
// func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
// if section == 3 {
// let cell = tableView.dequeueReusableCell(withIdentifier: "headerCell") as! HeaderTableViewCell
// return cell
// }
// return UIView()
// }
// func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
// if section == 3 {
// return 50
// }
// return CGFloat()
// }
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if indexPath.section == 1 {
guard let tableViewCell = cell as? TableViewCell else {
return
}
tableViewCell.setCollectionViewDataSourceDelegate(dataSourceDelegate: self, forRow: indexPath.row)
}
if indexPath.section == 2 {
guard let tableViewCell2 = cell as? TableViewCell2 else {
return
}
tableViewCell2.setCollectionViewDataSourceDelegate(dataSourceDelegate: self, forRow: indexPath.row)
}
// we store the offset from here into the dictionary we created above
//tableViewCell.collectionViewOffset = storedOffsets[indexPath.row] ?? 0
}
func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath) {
guard let tableViewCell = cell as? TableViewCell else { return }
storedOffsets[indexPath.row] = tableViewCell.collectionViewOffset
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if indexPath.section == 0 {
return 350
}
if indexPath.section == 1 {
return 130
}
if indexPath.section == 2 {
return 200
}
if indexPath.section == 3 {
return 50
}
if indexPath.section == 4 {
return 220
}
return CGFloat()
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print(indexPath)
}
}
// collectionView inside tableview cell
extension TabViewController1: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return model[collectionView.tag].count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell", for: indexPath) as? CollectionCell1 {
cell.backgroundColor = UIColor.gray
return cell
}
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionCell2", for: indexPath) as? CollectionCell2 {
cell.backgroundColor = UIColor.purple
return cell
}
return UICollectionViewCell()
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("Collection view at row \(collectionView.tag) selected index path \(indexPath)")
}
}
你有沒有分段tableview？ – ivarun
@ivarun此刻我有部分。我在EDIT中添加了全班，供您參考。感謝您的幫助 – user7097242