我有一个视图UIViewController，它包含两个容器，一个容器嵌入到UIViewController，第二个嵌入到UITableViewController。 UIViewController有一个包含3个段的SegmentedControl。我想根据每个段更改UITableViewController内容。哪种方式更好实现？
其中一个表格视图的示例:(我还有两首歌曲和艺术家）
class AlbumsSegmentView: UITableViewController{
let qryAlbums = MPMediaQuery.albums()
var allAlbums : [MPMediaItem] = []
var contentView = UIViewController()
var myMP = MPMusicPlayerController.systemMusicPlayer()
override func viewDidLoad() {
/* Background */
tableView.backgroundColor = UIColor.clear
tableView.separatorColor = UIColor.clear
/* Grouping list */
qryAlbums.groupingType = MPMediaGrouping.album
allAlbums += MPMediaQuery.albums().items!
self.clearsSelectionOnViewWillAppear = false
self.view.isHidden=true
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell: CustomTableViewCellAlbum = CustomTableViewCellAlbum(style: UITableViewCellStyle.subtitle, reuseIdentifier: "cell")
cell.imageView!.clipsToBounds = true
/* For Album list */
let currLoc = qryAlbums.collectionSections![indexPath.section].range.location
let rowItem = qryAlbums.collections![indexPath.row + currLoc]
//Main text is Album name
cell.textLabel!.text = rowItem.items[0].albumTitle
cell.textLabel!.font = UIFont(name: "HelveticaNeue-Thin", size: 22)
cell.textLabel!.textColor = UIColor.white
// Detail text is Album artist
cell.detailTextLabel!.text = rowItem.items[0].albumArtist!
cell.detailTextLabel!.font = UIFont(name: "HelveticaNeue-Thin", size:18)
cell.detailTextLabel!.textColor = UIColor.white
cell.backgroundColor = UIColor.clear
let seperatorImageView = UIImageView.init(image: UIImage.init(named: "Separator.png"))
seperatorImageView.frame = CGRect(x: 10, y: cell.contentView.frame.size.height+26, width: cell.contentView.frame.size.width, height: 3)
cell.contentView.addSubview(seperatorImageView)
// Or number of songs from the current album if you prefer
//cell.detailTextLabel!.text = String(rowItem.items.count) + " songs"
// Add the album artwork
let artWork = rowItem.representativeItem?.artwork
let tableImageSize = CGSize(width: 10, height: 10) //doesn't matter - gets resized below
let cellImg: UIImageView = UIImageView(frame: CGRect(x:12,y:6,width:60,height:60))
cellImg.image = artWork?.image(at: tableImageSize)
cell.addSubview(cellImg)
return cell
}
/* For Songs list */
func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
let sectionIndexTitles = qryAlbums.itemSections!.map { $0.title }
return sectionIndexTitles
}
func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
return index
}
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return (qryAlbums.itemSections![section].title)
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return allAlbums.count
//return (qryAlbums.collections?.count)!;
//return qryAlbums.collectionSections![section].range.length
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let currLoc = qryAlbums.collectionSections![indexPath.section].range.location
myMP.setQueue(with: qryAlbums.collections![indexPath.row + currLoc])
myMP.play()
}
}
class CustomTableViewCellAlbum: UITableViewCell {
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
// Here you can customize the appearance of your cell
override func layoutSubviews() {
super.layoutSubviews()
// Customize imageView like you need
self.imageView?.frame = CGRect(x:12,y:6,width:60,height:60)
self.imageView?.contentMode = UIViewContentMode.scaleAspectFit
self.textLabel?.frame = CGRect(x:78, y:5, width:200, height:30)
self.detailTextLabel?.frame = CGRect(x:78, y:35, width:200, height:30)
}
}
容器示例：
class MyParentViewController: UIViewController {
var buttonPanelViewController: PanelViewController!
var tableViewController: TableViewController2!
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let tableViewController = segue.destination as? TableViewController {
self.tableViewController = tableViewController
}
else if let buttonPanelViewController = segue.destination as? PanelViewController {
self.buttonPanelViewController = buttonPanelViewController
}
}
}
class TableViewController: UITableViewController {}
class PanelViewController: UIViewController {}
故事板视图示例 Picture example
UPD：我尝试的最后一件事是在MyParentViewController中创建3个不同的UIViews并将它们附加到不同的类（歌曲，艺术家，专辑）并尝试在切换后逐个隐藏细分，但它不起作用。也许还有另一种更好的方法来实现它？
class MyParentViewController: UIViewController {
var buttonPanelViewController: PanelViewController!
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let artistViewController = segue.destination as? ArtistViewController {
self.artistViewController = artistViewController
}
else if let buttonPanelViewController = segue.destination as? PanelViewController {
self.buttonPanelViewController = buttonPanelViewController
}
else if let songViewController = segue.destination as? SongViewController { self.songViewController = songViewController
}
else let albumViewController = segue.destination as? AlbumViewController { self.albumViewController = albumViewController
}
}
}
}
class TableViewController: UITableViewController {}
class PanelViewController: UIViewController {
@IBOutlet public weak var segmentTest: UISegmentedControl!
@IBAction func testAction(_ sender: UISegmentedControl) {
if (segmentTest.selectedSegmentIndex == 0){
BackTableVC().view.isHidden=false
SongsSegmentView().view.isHidden = true
AlbumsSegmentView().view.isHidden = true
print("Hi")
}else if (segmentTest.selectedSegmentIndex == 1){
BackTableVC().view.isHidden = true
SongsSegmentView().view.isHidden = false
AlbumsSegmentView().view.isHidden = true
print("Thank")
}else{
BackTableVC().view.isHidden = true
SongsSegmentView().view.isHidden = true
AlbumsSegmentView().view.isHidden = false
print("You")
}
}
}
class ArtistViewController: UIView{
} class SongViewController: UIView{
} class AlbumViewController: UIView{
}
答案 0 :(得分：0)
解决此问题的最佳方法是不更改每个分段控件的表视图，而是更改每个分段控件上的单元格。为表视图控制器注册3个单元格，一旦分段控制值发生变化，调用委托函数来更改哪个单元格出列，然后用新内容更新表格视图。
从BackPanelVC中，在已更改值的情况下，从分段控件到其类创建一个操作。在该操作中，调用一个委托函数，用它来切换到哪个控件。
protocol SegmentControlChangeDelegate {
func segmentedControlChangedValue(_ value: Int)
}
class PanelViewController: UIViewController {
@IBOutlet public weak var segmentTest: UISegmentedControl!
var delegate: SegmentControlChangeDelegate?
@IBAction func testAction(_ sender: UISegmentedControl) {
delegate.segmentedControlChangedValue(value: sender.selectedSegmentIndex)
self.performSegue(with: "identifier")
}
}
并且在tableviewcontroller中符合委托，如：
class AlbumsSegmentView: UITableViewController, SegmentControlChangeDelegate {
func segmentedControlChangedValue(_ value: Int){
// Change which cell is being displayed with some type of boolean or switch statement that will be recalled in cell.dequeue
}
}
并确保在tableviewcontroller中将委托设置为self
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destinationVC = segue.destination as? PanelViewController {
destinationVC.delegate = self
}
}