Question

我当前可以单击多行并更改标签的颜色，然后转到下一个视图控制器，但当我回到表视图时，我将在视图中打印selectrowatindexpath并显示正确的值，但是标签没有着色。选择表示标签是白色的，但即使打印选定的值，标签也不是。我该如何解决这个问题？

var selected = ["dog", "cat", "bat"]
var animal = [String]() //selected data

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell: selectcell = table.dequeueReusableCellWithIdentifier("Cell") as! selectcell
    cell.subjecters.text = selected[indexPath.row]
    cell.selectionStyle = UITableViewCellSelectionStyle.None

    if(animal != []){
        for(var i = 0; i < selected.count; i++){
            for(var x = 0; x < animal.count; x++){
                if(selected[i] == animal[x]){
                    var rowtoselect = NSIndexPath(forRow: i, inSection: 0)
                    self.table.selectRowAtIndexPath(rowtoselect, animated: true, scrollPosition: .None)


                    cell.subject.textColor = UIColorFromRGB("f07763")

                }
            }

        }
    }


    return cell
}



     func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    let currentCell = table.cellForRowAtIndexPath(indexPath) as! selectcell
    currentCell.subject.textColor = UIColorFromRGB("ffffff")
    currentCell.selectionStyle = UITableViewCellSelectionStyle.None
    self.selected.append(currentCell.subjecter.text!) 
}

Answer 1

您正在更新didSelectRowAtIndexPath func中的标签，但只有在您进行选择时才会调用。

当您返回视图时，单元格会通过cellForRowAtIndexPath更新 - 因此请更改颜色

Answer 2

将您的模型（动物数组）扩展为具有属性name和selected的类。在cellForRowAtIndexPath中设置颜色取决于selected属性并删除selectRow....选择行后获取该行的模型项，将selected设置为true并重新加载表视图。这是实用的MVC。

class Animal {

  let name : String
  var selected = false

  init(name : String) {
    self.name = name
  }
}



class ViewController : UITableViewController {

  var animals = [Animal]()

  override func viewDidLoad() {
    animals = [Animal(name: "dog"), Animal(name: "cat"), Animal(name: "bat")]
  }

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

  override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell: selectcell = table.dequeueReusableCellWithIdentifier("Cell") as! selectcell
    cell.selectionStyle = UITableViewCellSelectionStyle.None

    let animal = animals[indexPath.row]
    cell.subjecters.text = animal.name
    cell.subject.textColor = animal.selected ?  UIColorFromRGB("ffffff") : UIColorFromRGB("f07763")
    return cell
  }

 override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    let animal = animals[indexPath.row]
    animal.selected = true
    tableView.reloadData()
  }

}

如何更改didSelectRowAtIndexPath函数之外的标签颜色？

2 个答案: