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我想让用户修改/删除tableview中的默认文本,我已经尝试了以下代码巫婆的作品,但只要用户去其他视图控制器和回(或离开应用程序,并回来),文本可以追溯到默认文本。 我怎么能工作? 我已经发布了tableView的整个代码,所以你可以有我可以做错了什么的概述。 谢谢!如何编辑或删除tableView中的文本?
var places = [Dictionary<String,String>()]
var activePlace = -1
class TableViewController: UITableViewController {
func companyNameUpdatedAlert(title: String, error: String, indexPath: Int) {
let alert = UIAlertController(title: title, message: error, preferredStyle: UIAlertControllerStyle.Alert)
alert.addTextFieldWithConfigurationHandler { (textField) -> Void in
textField.placeholder = "Enter new text"
}
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in
let lat = places[indexPath]["lat"]!
let lon = places[indexPath]["lon"]!
places.removeAtIndex(indexPath)
places.insert(["name" : alert.textFields![0].text!, "lat" : lat, "lon" : lon], atIndex: indexPath)
self.tableView.reloadData()
}))
self.presentViewController(alert, animated: true, completion: nil)
}
override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]? {
let changeText = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Change text" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
self.companyNameUpdatedAlert("Update text", error: "enter text below", indexPath: indexPath.row)
})
let deleteAction = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Delete" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
places.removeAtIndex(indexPath.row)
tableView.reloadData()
})
return [changeText, deleteAction]
}
override func viewDidLoad() {
//save start
if NSUserDefaults.standardUserDefaults().objectForKey("places") != nil {
places = NSUserDefaults.standardUserDefaults().objectForKey("places") as! [Dictionary]
//save stop
super.viewDidLoad()
if places.count == 1 {
places.removeAtIndex(0)
places.append(["name":"Long press on map to add location","lat":"90","lon":"90"])
}
if NSUserDefaults.standardUserDefaults().objectForKey("places") != nil {
places = NSUserDefaults.standardUserDefaults().objectForKey("places") as! [Dictionary]
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return places.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text = places[indexPath.row]["name"]
return cell
}
override func tableView(tableView: UITableView, willSelectRowAtIndexPath indexPath: NSIndexPath) -> NSIndexPath? {
activePlace = indexPath.row
return indexPath
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "newPlace" {
activePlace = -1
}
}
override func viewWillAppear(animated: Bool) {
tableView.reloadData()
}
}
非常感谢,我一直停留在那一阵子 –