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私はテーブルビューを持っています。セルをクリックすると、データを編集できるページに移動し、セルからすべての情報が渡されます。それから私は "保存"/"削除"をクリックすることができ、変更をポストします/ firebaseからアイテムを削除します。その後、私はテーブルビューに戻り、新たに更新されたfirebaseデータを取得します。以前に開かれたVCのための機能トリガー
問題私は（私は詳細を削除/編集できるページ）の項目を削除する場合は、その後、バックテーブルビューに遷移します
は、その後、別のセルおよび編集をクリックして保存します編集済みの項目とを以前に削除した項目として送信します。どのようにこれが可能なのか私には意味をなさない。
調査
私は、異なる細胞を保存、アイテムを削除するアプリを殺し、再開、、その後みました。この場合、エラーは発生しません。これは、ある種のメモリ/メモリリークの問題があるかもしれないと私に信じていますが、私はこの問題を真に解決できるかどうかはわかりません。
誰が、なぜこの奇妙なfunctiを知っています/
import UIKit
import Firebase
class EditVC: UIViewController, UIPickerViewDelegate {
@IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var nameTextField: UITextField!
@IBOutlet weak var yearTextField: UITextField!
@IBOutlet weak var otherTextField: UITextField!
@IBOutlet weak var stateTextField: UITextField!
// Variables for items's Details
var itemID = ""
var name = ""
var year = ""
var other = ""
var state = ""
let userID = Auth.auth().currentUser!.uid
let ref = Database.database().reference()
override func viewDidLoad() {
super.viewDidLoad()
self.hideKeyboardWhenTappedAround()
//for shifting textFields when keyboard covers
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name:NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name:NSNotification.Name.UIKeyboardWillHide, object: nil)
setUpPickers()
// Set initial values for TextFields
nameTextField.text = name
yearTextField.text = year
otherTextField.text = other
stateTextField.text = state
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/////////////////////////
// Buttons
@IBAction func returnButtonPressed(_ sender: Any) {
save()
performSegue(withIdentifier: "backToTableView", sender: self)
}
@IBAction func deleteButtonPressed(_ sender: Any) {
if itemID != "" {
print("removing item")
self.ref.child("users").child(userID).child("items").child(itemID).removeValue();
}
performSegue(withIdentifier: "backToTableView", sender: self)
}
@IBAction func doneButton(_ sender: Any) {
save()
performSegue(withIdentifier: "backToTableView", sender: self)
}
// End of [Buttons]
/////////////////////////
func save() {
// Create an items object to post
// Get the values from all textfields and set in the object
let itemsToPost : [String: Any] = [
"name": nameTextField.text ?? "",
"year": yearTextField.text ?? "",
"state": stateTextField.text ?? "",
"other": otherTextField.text ?? ""
]
// if the user is saving a new item (itemID == ""), then create a new ID and set itemID
if (itemID == "") {
itemID = ref.child("users/" + userID + "/items").childByAutoId().key
}
// post the items object to firebase
for item in items {
self.ref.child("users/" + userID + "/items/" + itemID).child(item.key).setValue(item.value)
}
}
//////////
// Picker Controllers
//Arrays for picker views
let stateArray = ["State", "AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE", "FL", "GA", "HI", "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", "MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", "NM", "NY", "NC", "ND", "OH", "OK", "OR", "PA", "RI", "SC", "SD", "TN", "TX", "UT", "VT", "VA", "WA", "WV", "WI", "WY"]
var yearArray : [String] = []
let errorArray = ["unable to load"]
let yearPickerView = UIPickerView()
let statePickerView = UIPickerView()
func setUpPickers() {
print("running setUpPickers")
// new picker
yearPickerView.delegate = self
yearTextField.inputView = yearPickerView
statePickerView.delegate = self
stateTextField.inputView = statePickerView
var i = 1900
let date = Date()
let calendar = Calendar.current
let maxYear = calendar.component(.year, from: date)
while i < (maxYear + 1) {
yearArray.insert(String(describing: i), at: 0)
i += 1
}
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
print("setting titleForRow...")
if pickerView == statePickerView {
return stateArray[row]
} else if pickerView == yearPickerView {
return yearArray[row]
} else {
return errorArray[0]
}
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
print("setting numberOfRowsInComponent...")
if pickerView == statePickerView {
return stateArray.count
} else if pickerView == yearPickerView {
return yearArray.count
} else {
return errorArray.count
}
}
public func numberOfComponents(in pickerView: UIPickerView) -> Int{
print("setting numberOfComponents...")
return 1
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
print("setting didSelectRow...")
if pickerView == statePickerView {
print("setting text of stateTextField")
stateTextField.text = stateArray[row]
if stateTextField.text == stateArray[0] {
stateTextField.textColor = UIColor.lightGray
} else {
stateTextField.textColor = UIColor.black
}
} else if pickerView == yearPickerView {
print("setting text of yearTextField")
yearTextField.text = yearArray[row]
if yearTextField.text == stateArray[0] {
yearTextField.textColor = UIColor.lightGray
} else {
yearTextField.textColor = UIColor.black
}
}
}
//
//////////
///////////////////////////////////////
// shifting text fields (add listeners in viewDidLoad)
func keyboardWillShow(notification:NSNotification){
print("running keyboardWillShow...")
//give room at the bottom of the scroll view, so it doesn't cover up anything the user needs to tap
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = (keyboardFrame.size.height + 60)
self.scrollView.contentInset = contentInset
}
func keyboardWillHide(notification:NSNotification){
print("running keyboardWillHide...")
let contentInset:UIEdgeInsets = UIEdgeInsets.zero
self.scrollView.contentInset = contentInset
print("saving...")
save()
print("finished keyboardWillHide...")
}
//
///////////////////////////////////////
}
を削除テーブルビュー編集する
import UIKit
import Firebase
class ItemListVC: UIViewController, UITableViewDelegate, UITableViewDataSource, UIPickerViewDelegate {
//reference to firebase database
var ref : DatabaseReference?
var handle : DatabaseHandle?
var allItemData : [String:Any] = [:]
// Get current userID
let userID = (Auth.auth().currentUser?.uid) ?? ""
// Outlets
@IBOutlet weak var addItemOutlet: UIButton!
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var numberOfItemsTextBox: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Set up tableView
tableView.delegate = self
tableView.dataSource = self
tableView.rowHeight = 69
// Set up UIPickerView (dropdown for numberOfItemsTextBox)
setUpPickers()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
// fetch user's item data from firebase
ref = Database.database().reference()
handle = ref?.child("users").child(userID).child("items").observe(DataEventType.value, with: { (snapshot) in
// replace the old array
self.allItemData = snapshot.value as? [String : AnyObject] ?? [:]
// reload the UITableView
self.tableView.reloadData()
self.setEnableForAddOutlet()
})
// Get numberOfItems
ref.child("user/" + userID + "/items/numberOfItems").observeSingleEvent(of: .value, with: { (snapshot) in
if snapshot.value is NSNull {
self.numberOfItemsTextBox.text = ""
} else {
// successfully fetched value
value = (snapshot.value as? NSDictionary)!
self.numberOfItemsTextBox.text = numberOfItems
}
})
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func save() {
print("post the value for numberOfItems to firebase")
let itemsToPost : [String: Any] = [
"numberOfItems" : numberOfItemsTextBox.text ?? "",
]
for item in items {
self.ref.child("users/" + userID + "/items").child(item.key).setValue(item.value)
}
}
// Action when the return key pressed
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
print("running textFieldShouldReturn")
textField.resignFirstResponder()
return true
}
func setEnableForAddOutlet() {
if (allItemData.count > 1) {
addItemOutlet.isEnabled = false
} else {
addItemOutlet.isEnabled = true
}
}
////////////////
// BUTTONS
@IBAction func addItemButtonPressed(_ sender: Any) {
// Save
save()
performSegue(withIdentifier:"ItemAdd", sender: nil)
}
@IBAction func nextButtonPressed(_ sender: Any) {
// Save
save()
performSegue(withIdentifier:"mySegueToADifferentPlace", sender: nil)
}
@IBAction func doneButtonPressed(_ sender: Any) {
// Save
save()
performSegue(withIdentifier:"mySegueToSomeWhereElse", sender: nil)
}
@IBAction func backButtonPressed(_ sender: Any) {
// Save
save()
performSegue(withIdentifier:"mySegueToSomeWhereElse", sender: nil)
}
// End of [BUTTONS]
////////////////
////////////////
// TABLE VIEW
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return allItemData.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! itemListCell
let key = Array(allItemData.keys)[indexPath.row]
let item = (allItemData[key] as? [String:Any]) ?? [:]
let name = (item["name"] as? String) ?? ""
let year = (item["year"] as? String) ?? ""
cell.titleLabel?.text = name
cell.itemID = key
cell.name = name
cell.year = year
cell.other = (item["other"] as? String) ?? ""
cell.state = (item["state"] as? String) ?? ""
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
performSegue(withIdentifier:"ItemEdit", sender: nil)
}
// End of [TABLE VIEW]
////////////////
//////////
// Picker Controllers
//Arrays for picker views
let numOfItemsArray = ["0", "1", "2", "2+"]
let errorArray = ["unable to load"]
let itemPickerView = UIPickerView()
func setUpPickers() {
print("running setUpPickers")
// new picker
itemPickerView.delegate = self
numberOfItemsTextBox.inputView = itemPickerView
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
print("setting titleForRow...")
if pickerView == itemPickerView {
return numOfItemsArray[row]
} else {
return errorArray[0]
}
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
print("setting numberOfRowsInComponent...")
if pickerView == itemPickerView {
return numOfItemsArray.count
} else {
return errorArray.count
}
}
func numberOfComponents(in pickerView: UIPickerView) -> Int{
print("setting numberOfComponents...")
return 1
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
print("setting didSelectRow...")
if pickerView == itemPickerView {
//change the text in the textField equal to the selection
let value = numOfItemsArray[row]
numberOfItemsTextBox.text = value
if value == numOfItemsArray[0] {
numberOfItemsTextBox.textColor = UIColor.lightGray
} else {
numberOfItemsTextBox.textColor = UIColor.black
}
}
numberOfItemsTextBox.resignFirstResponder()
}
//
//////////
///////////////////
//MARK: - Navigation
//In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "ItemEdit" {
// get the indexPath of the selected cell
if let indexPath = tableView.indexPathForSelectedRow {
// get the selected cell
let cell = tableView.cellForRow(at: indexPath) as! itemListCell
// get an instance of the next ViewController
let itemController : EditVC = segue.destination as! EditVC
// take all the data from the selected cell and pass it to the next ViewController
print("itemController variables")
itemController.itemID = cell.itemID
itemController.name = cell.name
itemController.year = cell.year
itemController.other = cell.other
itemController.state = cell.state
} else {
// tell the user if the indexPath of the selected cell cannot be retrieved
print("Unable to select item")
}
}
}
//////////////////
}
のViewControllerと私の試み
のViewController一貫性が発生しているとどのようにそれを解決するには？
は、任意のアイデア
2番目のviewcontrollerからdeleteButtonPressedからperformSegue（withIdentifier： "backToTableView"、sender：self）という行をコメントしてからコードを実行すると、結果は何ですか？ – 3stud1ant3
"backToTableView"のperpareForSegueを作成し、このスペースを使用して、変数に渡されたすべてを ""に戻してください。その後、リロード時に削除された情報がまだ投稿されているかどうかを確認します。 – DoesData
@DoesData、ご提案いただきありがとうございます。それは良い考えだった。私は変数を '' PrepForSegue''を使って ""に戻してみましたが、これは実際にはさらに重複していました。 – Rbar