Espandi e comprimi celle tableview

Question

Sono in grado di espandere e comprimere celle, ma voglio chiamare funzioni (espandere e comprimere) all'interno di UITableViewCell per cambiare titolo pulsante.

 
import UIKit 

class MyTicketsTableViewController: UITableViewController { 

    var selectedIndexPath: NSIndexPath? 
    var extraHeight: CGFloat = 100 

    override func viewDidLoad() { 
     super.viewDidLoad() 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
     return 5 
    } 

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
     let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! MyTicketsTableViewCell 
     return cell 
    } 

    override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { 
     if(selectedIndexPath != nil && indexPath.compare(selectedIndexPath!) == NSComparisonResult.OrderedSame) { 
      return 230 + extraHeight 
     } 

     return 230.0 
    } 

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 
     if(selectedIndexPath == indexPath) { 
      selectedIndexPath = nil 
     } else { 
      selectedIndexPath = indexPath 
     } 

     tableView.beginUpdates() 
     tableView.endUpdates() 
    } 
} 

 
import UIKit 

class MyTicketsTableViewCell: UITableViewCell { 

    @IBOutlet weak var expandButton: ExpandButton! 
    @IBOutlet weak var detailsHeightConstraint: NSLayoutConstraint! 

    var defaultHeight: CGFloat! 

    override func awakeFromNib() { 
     super.awakeFromNib() 

     defaultHeight = detailsHeightConstraint.constant 

     expandButton.button.setTitle("TAP FOR DETAILS", forState: .Normal) 
     detailsHeightConstraint.constant = 30 
    } 

    func expand() { 
     UIView.animateWithDuration(0.3, delay: 0.0, options: .CurveLinear, animations: { 
      self.expandButton.arrowImage.transform = CGAffineTransformMakeRotation(CGFloat(M_PI * 0.99)) 
      self.detailsHeightConstraint.constant = self.defaultHeight 
      self.layoutIfNeeded() 

      }, completion: { finished in 
       self.expandButton.button.setTitle("CLOSE", forState: .Normal) 
     }) 
    } 

    func collapse() { 
     UIView.animateWithDuration(0.3, delay: 0.0, options: .CurveLinear, animations: { 
      self.expandButton.arrowImage.transform = CGAffineTransformMakeRotation(CGFloat(M_PI * 0.0)) 
      self.detailsHeightConstraint.constant = CGFloat(30.0) 
      self.layoutIfNeeded() 

      }, completion: { finished in 
       self.expandButton.button.setTitle("TAP FOR DETAILS", forState: .Normal) 
     }) 
    } 

} 

Answer 1

Se si desidera che il cellulare per ottenere fisicamente più grande, allora dove avete il vostro negozio NSIndexPath, in heightForRow: uso:

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { 
    if selectedIndexPath == indexPath { 
     return 230 + extraHeight 
    } 
    return 230.0 
} 

Poi, quando si desidera espandere uno nella didSelectRow:

storedIndexPath = indexPath 
tableView.beginUpdates 
tableView.endUpdates 

Modifica

Questo renderà le cellule animano stessi sempre più grande, non avete bisogno di blocchi di animazione supplementari in cella.

Edit 2

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 
     if(selectedIndexPath == indexPath) { 
      selectedIndexPath = nil 

      if let cell = tableView.cellForRowAtIndexPath(indexPath) as? MyTicketsTableViewCell { 
      cell.collapse() 
      } 
      if let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow:indexPath.row+1, section: indexPath.section) as? MyTicketsTableViewCell { 
      cell.collapse() 
      } 
     } else { 
      selectedIndexPath = indexPath 

      if let cell = tableView.cellForRowAtIndexPath(indexPath) as? MyTicketsTableViewCell { 
       cell.expand() 
      } 

      if let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow:indexPath.row+1, section: indexPath.section) as? MyTicketsTableViewCell { 
      cell.expand() 
      } 
     } 

     tableView.beginUpdates() 
     tableView.endUpdates() 
    } 

Answer 2

Tutto ciò che serve è implementare UITableView delegato in questo modo:

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { 
    return UITableViewAutomaticDimension 
} 

override func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { 
    return UITableViewAutomaticDimension 
} 

Per impostazione predefinita, estimatedHeight è CGRectZero, quando si imposta un valore per esso, permette il ridimensionamento automatico (la stessa situazione con UICollectionView), è possibile fare anche così:

tableView?.estimatedRowHeight = CGSizeMake(50.f, 50.f); 

Quindi è necessario impostare i vincoli all'interno della cella.

Controllare questo post: https://www.hackingwithswift.com/read/32/2/automatically-resizing-uitableviewcells-with-dynamic-type-and-ns

Speranza che aiuta)

Answer 3

In MyTicketsTableViewController classe, all'interno cellForRowAtIndexPath metodo origine dati aggiungere bersaglio per il pulsante.

cell.expandButton.addTarget(self, action: "expandorcollapsed:", forControlEvents: UIControlEvents.TouchUpInside)