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Question

我正在使用帶有原型單元格的UITableView。主TableView是DiveDetails2VC，原型單元格基於DiveItemViewController通過segue。

我需要保存來解析結果，並且已經能夠僅保存第0行來解析。我不知道如何設置它，以便在tableview中選擇的任何行都被髮送到解析。我知道這是由行saveEntry造成的：

let indexPath = NSIndexPath(forRow: 0, inSection: 0) 

，但我不知道如何設置forRow聲明允許顯示陣列中的任何一行。只有一個部分。

DiveItemViewController

class DiveItemViewController: UITableViewController, ItemDataProtocol 
{ 

private let NumberOfSections: Int = 1 

// MARK: - Public Properties 

// 
// This property is an object that conforms to the ItemDataSelectedProtocol. We use it to call the 
// selectedItem method. 
// 
var itemDataSelectedDelegate: AnyObject? 


private var itemData: Array<String> = Array<String>() 


override func viewDidLoad() 
{ 
    super.viewDidLoad() 

    // Adds "+" to dive item selection so divers can add another item to the selected list 

    navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .Add, target: self, action: #selector(DiveItemViewController.AddItemButton(_:))) 
} 

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

// --------------------------------------------------------------------------------------------- 
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell 
{ 
    let cell: UITableViewCell! = tableView.dequeueReusableCellWithIdentifier(Resource.DiveItemCell) 

    if self.itemData.isEmpty == false 
    { 
     cell.textLabel?.text = itemData[indexPath.row] 
    } 

    parseItem = cell.textLabel!.text! 

    return cell 
} 

override func numberOfSectionsInTableView(tableView: UITableView) -> Int 
{ 
    return self.NumberOfSections 
} 

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

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

     tableView.cellForRowAtIndexPath(indexPath)?.accessoryType = UITableViewCellAccessoryType.Checkmark 
     if self.itemDataSelectedDelegate?.respondsToSelector(#selector(DiveDetails2VC.itemDataSelectedItem(_:))) != nil 
     { 
      (self.itemDataSelectedDelegate as! ItemDataSelectedProtocol).itemDataSelectedItem(indexPath.row) 
     } 
     tableView.deselectRowAtIndexPath(indexPath, animated: true) 
    } 

override func tableView(tableView: UITableView, willDeselectRowAtIndexPath indexPath: NSIndexPath) -> NSIndexPath? 
{ 
    tableView.cellForRowAtIndexPath(indexPath)?.accessoryType = UITableViewCellAccessoryType.None 

    return indexPath 
} 

func appendData(data: Array<String>) { 

} 


@IBAction func saveEntry (sender: AnyObject) { 

    let indexPath = NSIndexPath(forRow: 0, inSection: 0) 
    let cell = tableView.cellForRowAtIndexPath(indexPath) 

    let updateDivelog2Query = PFQuery(className: "divelog") 
    updateDivelog2Query.whereKey("uuid", equalTo: diveUUID) 
    updateDivelog2Query.getFirstObjectInBackgroundWithBlock {(objects: PFObject?, error: NSError?) -> Void in 

     if let updateDivelog2Object = objects { 

      updateDivelog2Object.setValue (self.itemData[indexPath.row], forKey: cell!.textLabel!.text!) 

      updateDivelog2Object.pinInBackground() 
      updateDivelog2Object.saveInBackgroundWithBlock {(done:Bool, error:NSError?) in 

       if done { 
        print ("ParseData UPDATED data saved") 

       } else { 
        updateDivelog2Object.saveEventually() 
       } 
      }}} 


} 

func itemTitle(title: String) 
{ 
    self.navigationItem.title = title 
} 

@IBAction func AddItemButton (sender: AnyObject) { 


    let alert = UIAlertController(title: "Add item", 
            message: "Add a new Item to your list", 
            preferredStyle: .Alert) 

    let saveAction = UIAlertAction(title: "Save", 
            style: .Default, 
            handler: { (action:UIAlertAction) -> Void in 

            let textField = alert.textFields!.first 
            self.itemData.append(textField!.text!) 
            self.tableView.reloadData() 
            self.appendData(self.itemData) 

    }) 

     let cancelAction = UIAlertAction(title: "Cancel", 
            style: .Default) { (action: UIAlertAction) -> Void in 
    } 

     alert.addTextFieldWithConfigurationHandler { 
     (textField: UITextField) -> Void in 
    } 

     alert.addAction(saveAction) 
     alert.addAction(cancelAction) 

     presentViewController(alert, 
          animated: true, 
          completion: nil) 

    tableView.reloadData() 

} 


func itemData(data: Array<String>) 
{ 
    self.itemData = data 
} 
} 

Answer 1

聲明一個var在viewController：

var selectedIndexPath: NSIndexPath? 

，然後在didSelectRowAtIndexPath，設置此var與所選indexPath，如：

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 
{ 
    if let _ = self.selectedIndexPath { 
     selectedIndexPath = indexPath 
    }else{ 
     selectedIndexPath = NSIndexPath(forRow: indexPath.row, inSection: indexPath.section) 
    } 
    tableView.cellForRowAtIndexPath(indexPath)?.accessoryType = UITableViewCellAccessoryType.Checkmark 
    if self.itemDataSelectedDelegate?.respondsToSelector(#selector(DiveDetails2VC.itemDataSelectedItem(_:))) != nil 
    { 
     (self.itemDataSelectedDelegate as! ItemDataSelectedProtocol).itemDataSelectedItem(indexPath.row) 
    } 
    tableView.deselectRowAtIndexPath(indexPath, animated: true) 
} 

然後用這個selectedIndexPath像這樣在你的saveEntry方法：

@IBAction func saveEntry (sender: AnyObject) { 
    if let indexPath = selectedIndexPath { 
     let cell = tableView.cellForRowAtIndexPath(indexPath) 
     ... 
    } 
} 

編輯：添加 「）」 後面的 「切入口：indexPath.section）」