Swift. Cambia colore dell'etichetta cella personalizzata Tableview quando selezionato

Question

Ho una cella personalizzata Tableview in rapido e in quella cella un'etichetta.

Desidero poter modificare l'etichetta quando si seleziona una cella.

Come posso riferire la mia etichetta personalizzata UITableviewCell in didSelectRowAtIndexPath

In Objective C per fare riferimento mia cella personalizzato in didSelectRowAtIndexPath vorrei utilizzare il seguente:

MPSurveyTableViewCell *cell = (MPSurveyTableViewCell *)[tableViewcellForRowAtIndexPath:indexPath]; 
cell.customLabel.TextColor = [UIColor redColor]; 

Cosa devo fare in rapida per raggiungere il stesso risultato?

Answer 1

Hai solo bisogno di tradurre lo stesso codice in Swift.

var myCell = tableView.cellForRowAtIndexPath(indexPath) as! MPSurveyTableViewCell 
myCell.customLabel.textColor = UIColor.redColor() 

Answer 2

Prova questo,

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 
    tableView.deselectRowAtIndexPath(indexPath, animated: true) 

    var Cell = tableView.cellForRowAtIndexPath(indexPath) as! MPSurveyTableViewCell 
    Cell. customLabel.textColor = UIColor. redColor() 
} 

Answer 3

risposte di cui sopra sono incompleti

Perché un UITableView riutilizza celle è necessario controllare se sono selezionate le cellule e regolare il colore in modo appropriato in cellForRowAtIndexPath. Ci possono essere errori di battitura, ma questo è la risposta completa:

func tableView(tableView: UICollectionView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 

    let cell = tableView.dequeueReusableCellWithIdentifier("cellIdentifierHere", forIndexPath: indexPath) as! MPSurveyTableViewCell 

    // setup your cell normally 

    // then adjust the color for cells since they will be reused 
    if cell.selected { 
     cell.customLabel.textColor = UIColor.redColor() 
    } else { 
     // change color back to whatever it was 
     cell.customLabel.textColor = UIColor.blackColor() 
    } 

    return cell 
} 

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){ 
    let cell = tableView.cellForRowAtIndexPath(indexPath) as! MPSurveyTableViewCell 
    cell.customLabel.textColor = UIColor.redColor() 
    tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None) 

} 

func tableView(tableView: UICollectionView, didDeselectItemAtIndexPath indexPath: NSIndexPath) { 
    let cell = tableView.cellForRowAtIndexPath(indexPath) as! MPSurveyTableViewCell 

    // change color back to whatever it was 
    cell.customLabel.textColor = UIColor.blackColor() 
    tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None) 

} 

Answer 4

rapida 3 Xcode 8

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 
    tableView.deselectRow(at: indexPath, animated: true) 
    let Cell = tableView.cellForRow(at: indexPath) 
    Cell?.textLabel?.textColor = UIColor.red 
} 

Answer 5

perché non usare setSelected in UITableViewCell sottoclasse?

override func setSelected(_ selected: Bool, animated: Bool) { 
    super.setSelected(selected, animated: animated) 
    customLabel.textColor = selected ? UIColor.red : UIColor.black 
} 

o se si vuole tornare al colore deselezionata dopo un determinato periodo di tempo:

override func setSelected(_ selected: Bool, animated: Bool) { 
    super.setSelected(selected, animated: animated) 
    if selected { 
    customLabel.textColor = UIColor.red 
    DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.2, execute: { [weak self] in 
    self?.customLabel.textColor = UIColor.black 
    } 
    } 
} 

Poi basta impostare il selectionStyle cellulare = .none