你好，我是 swift 的初學者，我收到一個錯誤“無法將型別 'Character' 的值分配給型別 '[String]'” 我該如何解決我的大腦現在在此代碼博客中丟失的問題 enter code here
匯入 UIKit 匯入 FirebaseFirestore 匯入 FirebaseAuth 匯入 FirebaseDatabase 匯入 FirebaseStorage
類 PhoneViewController：UIViewController {
@IBOutlet weak var tableView: UITableView!
var phoneModelText = [String]()
var imeiAdressText = [String]()
var userNameText = [String]()
var idText = [String]()
var phoneNumberText = [String]()
var detailsText = [String]()
var dateText = [String]()
var priceText = [String]()
var adressText = [String]()
var selectedPhoneModelText = ""
var selectedimeiAdressText = ""
var selecteduserNameText = ""
var selectedidText = ""
var selectedphoneNumberText = ""
var selecteddetailsText = ""
var selecteddateText = ""
var selectedpriceText = ""
var selectedadressText = ""
override func viewDidLoad() {
super.viewDidLoad()
navigationController?.navigationBar.prefersLargeTitles = true
tableView.dataSource = self
tableView.delegate = self
getdata()
}
func makeAlert(titleInput: String, messageInput : String) {
let alert = UIAlertController(title: titleInput, message: messageInput, preferredStyle: UIAlertController.Style.alert)
let okButton = UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: nil)
alert.addAction(okButton)
present(alert, animated: true, completion: nil)
}
func fetchBook(documentId: String) {
let db = Firestore.firestore()
let docRef = db.collection("Databases").document(documentId)
docRef.getDocument { document, error in
if let error = error as NSError? {
self.makeAlert(titleInput: "alert", messageInput: "\(error.localizedDescription)")
}
else {
if let document = document {
let id = document.documentID
let data = document.data()
let phonemodel = data?["phoneName"] as? String ?? ""
let imeiadress = data?["imeiNumberText"] as? Int ?? 0
let username = data?["userNameText"] as? String ?? ""
let idcard = data?["idCardtext"] as? Int ?? 0
let phonenumber = data?["phoneNumberText"] as? Int ?? 0
let adress = data?["adressNameText"] as? String ?? ""
let details = data?["detailSectionText"] as? String ?? ""
let date = data?["currentDateText"] as? String ?? ""
let price = data?["priceValueText"] as? Int ?? 0
let image = data?["imageurl"] as? String ?? ""
DispatchQueue.main.async {
self.selectedphoneNumberText = phonemodel
self.phoneModelText.text = phonemodel
self.imeiAdressText.text = String(imeiadress)
self.userNameText.text = username
self.idText.text = String(idcard)
self.phoneNumberText.text = String(phonenumber)
self.adressText.text = adress
self.detailsText.text = details
self.dateText.text = date
self.priceText.text = String(price)
}
}
}
}
}
}
擴展PhoneViewController : UITableViewDataSource,UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return phoneModelText.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = phoneModelText[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// how i customizing there
performSegue(withIdentifier: "toPhoneListView", sender: nil)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "toPhoneListView" {
let destinationVC = segue.destination as! PhoneListViewController
destinationVC.selectedPhoneModelText
destinationVC.selectedimeiAdressText
destinationVC.selecteduserNameText
destinationVC.selectedidText
destinationVC.selectedphoneNumberText
destinationVC.selecteddetailsText
destinationVC.selecteddateText
destinationVC.selectedpriceText
destinationVC.selectedadressText
}
}
}
uj5u.com熱心網友回復：
這就是你的 phoneModelText 的定義方式
var phoneModelText = [String]()
這表明 phoneModelText 是一個字串陣列，所以它看起來像這樣
phoneModelText[0] = "Some String"
phoneModelText[1] = "Another string"
但后來你試圖將字串分配給該陣列
self.phoneModelText.text = phonemodel
這不是陣列的作業方式。如果你想添加phoneModel到陣列中，那就是這個
self.phoneModelText.append(phoneModel) //assume phoneModel = "yet another string"
所以陣列看起來像這樣
phoneModelText[0] = "Some String"
phoneModelText[1] = "Another string"
phoneModelText[2] = "yet another string"
一般來說，我建議您命名您的變數，以便它們更能代表它們包含的內容 - 而不是 phoneModelText，將其稱為 phoneModelTextArray。這將減少混亂并使代碼更具可讀性。
至于解決方案，不清楚為什么會有一堆陣列
var phoneModelText = [String]()
var imeiAdressText = [String]()
var userNameText = [String]()
但我建議改變所有這些。一種選擇是定義一個具有屬性的類，然后擁有一個類陣列
class ContactClass {
var id = ""
var phoneText = ""
var imeiAdressText = ""
var userNameText = ""
}
然后是控制器中的一系列類
var contactArray = [ContactClass]()
然后最后，當從 Firebase 讀取資料時，實體化類，填充類屬性并將類添加到陣列中
else {
if let document = document {
let contact = ContactClass()
contact.id = document.documentID
contact.phoneText = data?["phoneName"] as? String ?? ""
contact.imeiAdressText = data?["imeiNumberText"] as? Int ?? 0
contact.userNameText = data?["userName"] as? String ?? ""
self.contactArray.append(contact)
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