Question

我有两个部分

1.MapViewController

2.TypesTableViewController

当我运行我的应用程序并调用TypesTableViewController时，它打开时显示所有选中的单元格我希望它不被选中请帮助我并检查我的代码

1.MapViewController

class MapViewController: UIViewController {

    @IBOutlet weak var mapCenterPinImage: UIImageView!
    @IBOutlet weak var pinImageVerticalConstraint: NSLayoutConstraint!
    var searchedTypes = ["bakery", "bar", "cafe", "grocery_or_supermarket", "restaurant"]

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "Types Segue" {
            let navigationController = segue.destinationViewController as! UINavigationController
            let controller = navigationController.topViewController as! TypesTableViewController
            controller.selectedTypes = searchedTypes
            controller.delegate = self
        }
    }
}

// MARK: - TypesTableViewControllerDelegate
extension MapViewController: TypesTableViewControllerDelegate {

    func typesController(controller: TypesTableViewController, didSelectTypes types: [String]) {
        searchedTypes = controller.selectedTypes.sort()
        dismissViewControllerAnimated(true, completion: nil)
    }

}

2.TypesTableViewController

protocol TypesTableViewControllerDelegate: class {
    func typesController(controller: TypesTableViewController, didSelectTypes types: [String])
}

class TypesTableViewController: UITableViewController {


    let possibleTypesDictionary = ["bakery":"Bakery", "bar":"Bar", "cafe":"Cafe", "grocery_or_supermarket":"Supermarket", "restaurant":"Restaurant"]
    var selectedTypes: [String]!
    weak var delegate: TypesTableViewControllerDelegate!
    var sortedKeys: [String] {
        return possibleTypesDictionary.keys.sort()
    }

    // MARK: - Actions
    @IBAction func donePressed(sender: AnyObject) {
        delegate?.typesController(self, didSelectTypes: selectedTypes)
    }

    // MARK: - Table view data source
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return possibleTypesDictionary.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("TypeCell", forIndexPath: indexPath) 
        let key = sortedKeys[indexPath.row]
        let type = possibleTypesDictionary[key]!
        cell.textLabel?.text = type
        cell.imageView?.image = UIImage(named: key)
        cell.accessoryType = (selectedTypes!).contains(key) ? .Checkmark : .None
        return cell
    }

    // MARK: - Table view delegate
    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        tableView.deselectRowAtIndexPath(indexPath, animated: true)
        let key = sortedKeys[indexPath.row]
        if (selectedTypes!).contains(key) {
            selectedTypes = selectedTypes.filter({$0 != key})
        } else {
            selectedTypes.append(key)
        }

        tableView.reloadData()
    }
}

Answer 1

不确定您在代码中做了什么。如果要取消选中，请将以下行更改为

cell.accessoryType = (selectedTypes!).contains(key) ? .Checkmark : .None

到

cell.accessoryType = (selectedTypes!).contains(key) ? . None : . Checkmark

更新： - 仅获取复选标记单元格的答案的第二部分，

更改如下

@IBAction func donePressed(sender: AnyObject) {
   let rowCount = tableView.numberOfRowsInSection(0)
   selectedTypes.removeAll()
  for var index = 0; index < rowCount; ++index {
      let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow: index, inSection: 0)) as! YourCell
      if cell.accessoryType = .Checkmark{
         let key = sortedKeys[index]
         selectedTypes.append(key)
      }
    delegate?.typesController(self, didSelectTypes: selectedTypes)
  }
}

Answer 2

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    
    //toggle checkmark on and off
    if tableView.cellForRow(at: indexPath)?.accessoryType == .checkmark {
        tableView.cellForRow(at: indexPath)?.accessoryType = .none
    }
    else {
        tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark
    }
    
    //add animation so cell does not stay selected
    tableView.deselectRow(at: indexPath, animated: true)
    
}

如何使用附件复选标记

2 个答案: