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私は電卓を作成しました。私はそれに別の機能を追加しようとしています、私は私のhistoryArrayに格納されている操作の私の履歴を私のTableViewControllerに渡したいと思います。私はデータを分割しようとしていますが、それを得ることはできません。私は周りに遊んでいたセグのメソッドのためにいくつかの異なる準備がコメントアウトされている。ここに私のコードは、これまでです：履歴の値をUITableViewControllerに書き込む
ViewController.swift
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var displayLabel: UILabel!
@IBOutlet weak var HistoryLabel: UILabel!
var historyArray: [String] = []
var userIsTypingNumbers = false
var firstNumber = 0
var secondNumber = 0
var operation = ""
var result = 0.0
@IBAction private func NumbersEntered(_ sender: UIButton) {
//know what number is being pressed
let number = sender.currentTitle
//if user is typing number, do this.
if userIsTypingNumbers {
//specify what number is being pressed.
//append the number onto the previous number.
displayLabel.text = displayLabel.text! + number!
} else {
displayLabel.text = number
userIsTypingNumbers = true
}
}
var displayValue: Double {
get {
return Double(displayLabel.text!)!
}
set {
displayLabel.text = String(newValue)
}
}
private var calculations = PerformCalculations()
@IBAction func OperationsPressed(_ sender: UIButton) {
userIsTypingNumbers = false
firstNumber = Int(Double(displayLabel.text!)!)
operation = sender.currentTitle!
if operation == "√" {
result = (PerformCalculations().squareroot(a: Double(firstNumber)))
displayLabel.text = String(result)
}
}
@IBAction func Enter(_ sender: UIButton) {
userIsTypingNumbers = false
secondNumber = Int(Double(displayLabel.text!)!)
if operation == "+" {
result = (PerformCalculations().add(a: Double(firstNumber), b: Double(secondNumber)))
} else if operation == "÷" {
result = (PerformCalculations().division(a: Double(firstNumber), b: Double(secondNumber)))
} else if operation == "×" {
result = (PerformCalculations().multiplication(a: Double(firstNumber), b: Double(secondNumber)))
} else if operation == "-" {
result = (PerformCalculations().subtract(a: Double(firstNumber), b: Double(secondNumber)))
}
displayLabel.text = String(result)
historyArray.append("\(firstNumber) \(operation) \(secondNumber) = \(result)")
userIsTypingNumbers = false
//self.performSegue(withIdentifier: "History", sender: self)
}
@IBAction func Clear(_ sender: UIButton) {
//clear display to 0.
displayLabel.text = "0"
}
@IBAction func Delete(_ sender: UIButton) {
//deleting last typed number, if user messed up.
let name: String = self.displayLabel.text!
//count number of characters.
let stringLength = name.characters.count
let substringIndex = stringLength - 1
displayLabel.text = (name as NSString).substring(to: substringIndex)
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "History" {
if let destinationVC = segue.destination as? TableTableViewController {
destinationVC.dataString = historyArray.description
}
}
}*/
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let destViewController : TableTableViewController = segue.destination as! TableTableViewController
destViewController.dataString = historyArray.description
}
}
Model.swift
がimport Foundation
class PerformCalculations {
func add(a: Double, b: Double) -> Double {
let result = a + b
return result
}
func division(a: Double, b: Double) -> Double {
let result = a/b
return result
}
func subtract(a: Double, b: Double) -> Double {
let result = a - b
return result
}
func multiplication(a: Double, b: Double) -> Double {
let result = a * b
return result
}
func squareroot(a: Double) -> Double {
let result = sqrt(a)
return result
}
}
TableTableViewController.swift
import UIKit
class TableTableViewController: UITableViewController {
//var dataString:String!
var historyArray: [String] = []
var i = 0
override func viewDidLoad() {
super.viewDidLoad()
i = 0
while i < historyArray.count{
AddLabel(history: historyArray[i])
i = i+1
}
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
func AddLabel(history: String){
let label = UILabel()
label.text = history
let y = i*15
label.frame = CGRect(x:125,y:y,width:200,height:21)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 0
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return 0
}
/*
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath)
// Configure the cell...
return cell
}
*/
/*
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
// Delete the row from the data source
tableView.deleteRows(at: [indexPath], with: .fade)
} else if editingStyle == .insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return true
}
*/
/*
// 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?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
任意の助けもいただければ幸いです、ありがとうございました！
あなたはどのような問題に直面していますか？ – KKRocks
私のhistoryArray内のデータが私のTableViewControllerに渡されていません。私はsegueが間違っているかどうか、または私が行方不明であるかどうか、私は計算を実行した後、私のhistoryArrayにデータがあることを確認した。 – walkerofskies1