我正在尝试从用户将输入到文本字段的tableview中保存值,问题是我不知道如何访问新值并替换数组中的字符串。
因此,应用程序基本上会根据用户的需求显示字段,然后用户可以根据自己的喜好编辑这些值。文本字段更新后,值将再次存储在userdefaults中,以便下次打开tableview时,将显示更新值。
这就是tableviewcontroller目前的样子:
//
// Asset1TableViewController.swift
// Net Calc 2
//
// Created by Joshua Peterson on 30/06/2015.
// Copyright © 2015 Peterson Productions. All rights reserved.
//
import UIKit
class Asset1TableViewController: UITableViewController {
var dataHolder: [NSString] = [NSString]()
var finalDataHolder: [NSString] = [NSString]()
var acountAmountHolder: [NSString] = [NSString]()
var finalAccountAmountHolder: [NSString] = [NSString]()
let defaults = NSUserDefaults.standardUserDefaults()
let key1 = "keySave1"
let key2 = "keySave2"
override func viewDidLoad() {
super.viewDidLoad()
dispatch_async(dispatch_get_main_queue(), { () -> Void in
if let storedTitleValue : NSArray? = self.defaults.arrayForKey(self.key1) {
if storedTitleValue == nil {
self.dataHolder = [NSString]()
} else {
let readArray : [NSString] = storedTitleValue as! [NSString]
for element in readArray {
self.dataHolder.append(element as String)
self.finalDataHolder.append(element as String)
}
}
}
if let storedAmountValue : NSArray? = self.defaults.arrayForKey(self.key2) {
if storedAmountValue == nil {
self.acountAmountHolder = [NSString]()
} else {
let readArray : [NSString] = storedAmountValue as! [NSString]
for element in readArray {
self.acountAmountHolder.append(element as String)
self.finalAccountAmountHolder.append(element as String)
}
}
}
})
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return dataHolder.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Account1Cell", forIndexPath: indexPath) as! Account1Cell
cell.AccountLabel.text = dataHolder[indexPath.row] as String
cell.AccountAmount.text = acountAmountHolder[indexPath.row] as String
return cell
}
@IBAction func addButtonTapped(sender: AnyObject) {
let newAccounTitle = "Account Name"
let newAccountAmount = "R0.00"
dataHolder.append(newAccounTitle)
acountAmountHolder.append(newAccountAmount)
tableView.reloadData()
}
@IBAction func saveButtonTapped(sender: AnyObject) {
// Save
defaults.setObject(dataHolder as Array, forKey: key1)
defaults.setObject(acountAmountHolder as Array, forKey: key2)
defaults.synchronize()
}
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
dataHolder.removeAtIndex(indexPath.row)
acountAmountHolder.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
/*
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the item to be re-orderable.
return true
}
*/
}
我试图应用我在网站上找到的一些代码,但问题是我实际上无法连接到单元格。
好的,经过一些研究后,我在自定义单元类中添加了一些函数,使它看起来像这样:
import UIKit
protocol TableViewCellDelegate {
// Indicates that the edit process has begun for the given cell
func cellDidBeginEditing(editingCell: Account1Cell)
// Indicates that the edit process has committed for the given cell
func cellDidEndEditing(editingCell: Account1Cell)
}
class Account1Cell: UITableViewCell, UITextFieldDelegate {
@IBOutlet weak var AccountLabel: UITextField!
@IBOutlet weak var AccountAmount: UITextField!
var delegate: TableViewCellDelegate?
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
AccountLabel.delegate = self
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
// close the keyboard on Enter
AccountLabel.resignFirstResponder()
return false
}
func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
// disable editing of completed to-do items
return true
}
func textFieldDidEndEditing(textField: UITextField) {
if AccountLabel != nil {
let newAccountLabel = AccountLabel.text
print(newAccountLabel) // Prints out the new edited text!!!!!!!!
}
if delegate != nil {
delegate!.cellDidEndEditing(self)
}
}
func textFieldDidBeginEditing(textField: UITextField) {
if delegate != nil {
delegate!.cellDidBeginEditing(self)
}
}
}
现在我需要做的是在索引处替换Array中的那个值(我认为这将是相当复杂的)或创建某种循环来读取所有值并简单地存储所有新的UserDefaults的值。也许还有别的东西?
任何帮助表示赞赏!!
答案 0 :(得分:1)
您的自定义单元格中应该有这样的协议,并在单元格中的文本字段被修改时调用它:
protocol TableViewCellToTVController{
func cellCurrentlyEditing(editingCell: Account1Cell) -> Int
}
....
func textFieldShouldReturn(textField: UITextField) -> Bool {
// close the keyboard on Enter
let myrow: Int? = self.delegate_special?.cellCurrentlyEditing(self)
println("cellCurrentlyEditing got called from delegate" , myrow)
AccountLabel.resignFirstResponder()
return false
}
在tableviewcontroller中实现此函数以了解选择了哪一行:
func cellCurrentlyEditing(editingCell: Account1Cell) -> Int{
var rowNum = 0
let indexP: NSIndexPath = tableView.indexPathForCell(editingCell)!
rowNum = indexP.row
return rowNum
}
还使tableviewcontroller成为每个单元格的委托:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Account1Cell", forIndexPath: indexPath) as! Account1Cell
cell.AccountLabel.text = dataHolder[indexPath.row] as String
cell.AccountAmount.text = acountAmountHolder[indexPath.row] as String
cell.delegate_special = self;
return cell
}