我在每个tableViewCell中都嵌入了一个collectionView。在每个tableViewWillDisplayCell事件中，我为我的collectionView设置了正确的dataSource，然后在collectionView中重新加载数据。
以下是代码：
override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
let c = cell as! CustomTableViewCell
c.setCollectionViewDataSourceDelegate(dataSourceDelegate: self, indexPath: indexPath)
}
CustomTableViewCell.swift：
class CustomTableViewCell: UITableViewCell {
var collectionView: indexedCollectionView!
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
var layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
layout.itemSize = CGSizeMake(5, 5)
layout.scrollDirection = UICollectionViewScrollDirection.Horizontal
self.collectionView = indexedCollectionView(frame: CGRectZero, collectionViewLayout: layout)
self.collectionView.registerClass(UICollectionViewCell.classForCoder(), forCellWithReuseIdentifier: collectionViewCellIdentifier as String)
self.collectionView.backgroundColor = UIColor.whiteColor()
self.collectionView.showsHorizontalScrollIndicator = false
self.contentView.addSubview(self.collectionView)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func layoutSubviews() {
super.layoutSubviews()
self.collectionView.frame = self.contentView.bounds;
}
func setCollectionViewDataSourceDelegate(dataSourceDelegate delegate: protocol<UICollectionViewDelegate,UICollectionViewDataSource>, indexPath: NSIndexPath){
self.collectionView.dataSource = delegate
self.collectionView.delegate = delegate
self.collectionView.indexPath = indexPath
self.collectionView.tag = indexPath.row
self.collectionView.reloadData()
}
}
TableViewController.swift：
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell: UICollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier("CollectionViewCell", forIndexPath: indexPath) as! UICollectionViewCell
let tableViewCell = self.tableView.cellForRowAtIndexPath(NSIndexPath(forItem: collectionView.tag, inSection: 0))
var rect: CGRect?
var label: UILabel = UILabel()
label.font = UIFont(name: "HelveticaNeue-Light", size: 18.0)
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.ByWordWrapping
label.textAlignment = .Center
switch indexPath.row {
case 0:
cell.frame = CGRectMake(0, 0, tableViewCell!.frame.width * 0.2, tableViewCell!.frame.height)
rect = cell.bounds
label.frame = rect!
label.text = events[collectionView.tag].category
break
case 1:
cell.frame = CGRectMake(tableViewCell!.frame.width * 0.2, 0, tableViewCell!.frame.width * 0.3, tableViewCell!.frame.height)
rect = cell.bounds
label.frame = rect!
label.text = events[collectionView.tag].event
break
case 2:
cell.frame = CGRectMake(tableViewCell!.frame.width * 0.5, 0, tableViewCell!.frame.width * 0.26, tableViewCell!.frame.height)
rect = cell.bounds
label.frame = rect!
label.text = events[collectionView.tag].location
break
case 3:
cell.frame = CGRectMake(tableViewCell!.frame.width * 0.76, 0, tableViewCell!.frame.width * 0.12, tableViewCell!.frame.height)
rect = cell.bounds
label.frame = rect!
label.text = events[collectionView.tag].date
break
case 4:
cell.frame = CGRectMake(tableViewCell!.frame.width * 0.88, 0, tableViewCell!.frame.width * 0.12, tableViewCell!.frame.height)
rect = cell.bounds
label.frame = rect!
label.text = events[collectionView.tag].time
break
default:
break
}
cell.addSubview(label)
cell.layer.borderColor = UIColor.blackColor().CGColor
cell.layer.borderWidth = 0.5
return cell
}
当应用程序启动时，一切看起来都很好（screenshot）但是当我滚动我的tableView时，它会再次为每个触发其collectionView的reloadData的单元格触发tableView willDisplayCell事件。
但它效果不佳（screenshot）。有人可以帮我解决我的问题吗？
更新：
我试图重新制作代码，但我遇到了问题。这是我的全部代码：
class TableViewController: UITableViewController {//, UICollectionViewDataSource, UICollectionViewDelegate {
var events: [Event] = [
Event(category: "GAA - Football Campionship", event: "Round 4A Munster Final Runner up v Round 3A Winner", location: "Semple Stadium - Thurles", date: "7/12/15", time: "2:00pm"),
Event(category: "Football", event: "Round 4A Munster", location: "Thurles", date: "7/2/15", time: "All day"),
Event(category: "Golf - 4 Majors", event: "U.S. Open Day 4 ( Final Day)", location: "Oakmont Country Club, Pennsylvania", date: "7/12/15", time: ""),
]
override func viewDidLoad() {
super.viewDidLoad()
//self.tableView.registerClass(CustomTableViewCell.self, forCellReuseIdentifier: "Cell")
self.tableView.separatorStyle = .None
self.tableView.tableFooterView = UIView(frame: CGRectZero)
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return events.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell: CustomTableViewCell? = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as? CustomTableViewCell
if cell == nil {
cell = CustomTableViewCell.CreateCustomCell()
}
cell!.event = events[indexPath.row]
cell!.size = CGSize(width: cell!.frame.width, height: cell!.frame.height)
cell!.collectionView.reloadData()
cell!.clipsToBounds = true
return cell!
}
// override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
// let c = cell as! CustomTableViewCell
// c.setCollectionViewDataSourceDelegate(dataSourceDelegate: self, indexPath: indexPath)
// }
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
var cellHeight: CGFloat = 0.0
let screenWidth: CGFloat = UIScreen.mainScreen().bounds.width
var question: NSString = events[indexPath.row].category
var size = CGSizeMake(screenWidth * 0.2, 9999)
var textRect = question.boundingRectWithSize(size, options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 18.0)!], context: nil)
size = textRect.size
cellHeight = size.height
question = events[indexPath.row].event
size = CGSizeMake(screenWidth * 0.3, 9999)
textRect = question.boundingRectWithSize(size, options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 18.0)!], context: nil)
size = textRect.size
if cellHeight < size.height {
cellHeight = size.height
}
question = events[indexPath.row].location
size = CGSizeMake(screenWidth * 0.3, 9999)
textRect = question.boundingRectWithSize(size, options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 18.0)!], context: nil)
size = textRect.size
if cellHeight < size.height {
cellHeight = size.height
}
question = events[indexPath.row].date
size = CGSizeMake(screenWidth * 0.1, 9999)
textRect = question.boundingRectWithSize(size, options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 18.0)!], context: nil)
size = textRect.size
if cellHeight < size.height {
cellHeight = size.height
}
question = events[indexPath.row].time
size = CGSizeMake(screenWidth * 0.1, 9999)
textRect = question.boundingRectWithSize(size, options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: UIFont(name: "HelveticaNeue-Light", size: 18.0)!], context: nil)
size = textRect.size
if cellHeight < size.height {
cellHeight = size.height
}
return cellHeight
}
}
CustomTableViewCell.swift：
class CustomTableViewCell: UITableViewCell, UICollectionViewDataSource, UICollectionViewDelegate {
//var collectionView: UICollectionView!
@IBOutlet weak var collectionView: UICollectionView!
var event: Event?
var size: CGSize?
override func awakeFromNib() {
super.awakeFromNib()
println("awake")
var layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
layout.itemSize = CGSizeMake(5, 5)
layout.scrollDirection = UICollectionViewScrollDirection.Horizontal
collectionView.collectionViewLayout = layout
//self.collectionView = indexedCollectionView(frame: CGRectZero, collectionViewLayout: layout)
collectionView.registerClass(CustomCollectionViewCell.self, forCellWithReuseIdentifier: "CollectionViewCell")
collectionView.backgroundColor = UIColor.whiteColor()
collectionView.showsHorizontalScrollIndicator = false
var cNib:UINib? = UINib(nibName: "CustomCollectionViewCell", bundle: nil)
collectionView.registerNib(cNib, forCellWithReuseIdentifier: "CollectionViewCell")
collectionView.frame = self.bounds
//self.contentView.addSubview(self.collectionView)
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
// var layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
// layout.sectionInset = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
// layout.itemSize = CGSizeMake(5, 5)
// layout.scrollDirection = UICollectionViewScrollDirection.Horizontal
// self.collectionView = indexedCollectionView(frame: CGRectZero, collectionViewLayout: layout)
// self.collectionView.registerClass(UICollectionViewCell.classForCoder(), forCellWithReuseIdentifier: collectionViewCellIdentifier as String)
// self.collectionView.backgroundColor = UIColor.whiteColor()
// self.collectionView.showsHorizontalScrollIndicator = false
// self.contentView.addSubview(self.collectionView)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
// override func layoutSubviews() {
// super.layoutSubviews()
// self.collectionView.frame = self.contentView.bounds;
// }
// func setCollectionViewDataSourceDelegate(dataSourceDelegate delegate: protocol<UICollectionViewDelegate,UICollectionViewDataSource>, indexPath: NSIndexPath){
// self.collectionView.dataSource = delegate
// self.collectionView.delegate = delegate
// self.collectionView.indexPath = indexPath
// self.collectionView.tag = indexPath.row
// self.collectionView.reloadData()
// }
// MARK: - Collection view data source
func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 5
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell: CustomCollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier("CollectionViewCell", forIndexPath: indexPath) as! CustomCollectionViewCell
//let tableViewCell = tableView!.cellForRowAtIndexPath(NSIndexPath(forItem: collectionView.tag, inSection: 0))
var rect: CGRect?
var label: UILabel = UILabel()
label.font = UIFont(name: "HelveticaNeue-Light", size: 18.0)
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.ByWordWrapping
label.textAlignment = .Center
switch indexPath.row {
case 0:
cell.frame = CGRectMake(0, 0, size!.width * 0.2, size!.height)
rect = cell.bounds
label.frame = rect!
label.text = event!.category
break
case 1:
cell.frame = CGRectMake(size!.width * 0.2, 0, size!.width * 0.3, size!.height)
rect = cell.bounds
label.frame = rect!
label.text = event!.event
break
case 2:
cell.frame = CGRectMake(size!.width * 0.5, 0, size!.width * 0.26, size!.height)
rect = cell.bounds
label.frame = rect!
label.text = event!.location
break
case 3:
cell.frame = CGRectMake(size!.width * 0.76, 0, size!.width * 0.12, size!.height)
rect = cell.bounds
label.frame = rect!
label.text = event!.date
break
case 4:
cell.frame = CGRectMake(size!.width * 0.88, 0, size!.width * 0.12, size!.height)
rect = cell.bounds
label.frame = rect!
label.text = event!.time
break
default:
break
}
cell.addSubview(label)
cell.layer.borderColor = UIColor.blackColor().CGColor
cell.layer.borderWidth = 0.5
return cell
}
class func CreateCustomCell() -> CustomTableViewCell
{
var nibElements: Array = NSBundle.mainBundle().loadNibNamed("CustomTableViewCell", owner: self, options: nil)
var item: AnyObject?
for item in nibElements
{
if item is UITableViewCell
{
return item as! CustomTableViewCell
}
}
return item as! CustomTableViewCell
}
}
CustomCollectionViewCell.swift
class CustomCollectionViewCell: UICollectionViewCell {
override init(frame: CGRect) {
super.init(frame: frame)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func awakeFromNib() {
super.awakeFromNib()
}
}
此外，在故事板中，我向tableViewCell添加了一个collectionView，将它连接到outlet变量，并将StoryCollectionCell类设置为storyboard中的collectionCell。
但是当我启动应用程序时，它会在tableViewCellForRowAtIndexPath中的这一行抛出一个异常：
2015-07-16 13：29：00.965 CollectionViewInTableViewCell [4241：1005396]由于未捕获异常而终止应用程序NSUnknownKeyException，原因：[CollectionViewInTableViewCell.CustomTableViewCell 0x126e12440 setValue：forUndefinedKey：]：此类不符合键值编码关键集合。'
答案 0 :(得分：0)
您的CustomTableViewCell必须实现UICollectionViewDelegate和UICollectionViewDataSource，并且在将其添加到表格视图时，单元格本身必须链接到委托和数据源。