Swift - 在風景中創建UIButton

Question

我在iOS 9，Swift和Xcode 7中製作計算器應用程序，我想知道如何在用戶切換到風景模式時創建UIButton。在數字左側增加更多的操作符，並且更改，將按鈕移開以騰出空間給新的操作員。 iOS的基本計算器可以做到這一點，我想知道如何？

我是iOS開發新手，我一直在瀏覽網頁只找到一個覆蓋函數：viewWillTransitionToSize()。這是做這種事情的正確功能嗎？

此外，每次進入橫向視圖時，都會創建另一個按鈕。我怎樣才能阻止這種情況發生？

附件是我的程序創建的UIButton和我上面列出的功能。

對不起，有一系列問題/問題。我很難在這個問題上找到教程或幫助。任何指導或解決方案都將有所幫助。非常感謝。

ViewController.swift

import UIKit 


class ViewController: UIViewController { 

    @IBOutlet weak var outputDisplay: UILabel! 

    @IBOutlet weak var number7: UIButton! 
    @IBOutlet weak var number1: UIButton! 
    @IBOutlet weak var number2: UIButton! 
    @IBOutlet weak var number3: UIButton! 
    @IBOutlet weak var number4: UIButton! 
    @IBOutlet weak var number5: UIButton! 
    @IBOutlet weak var number6: UIButton! 
    @IBOutlet weak var number9: UIButton! 
    @IBOutlet weak var number8: UIButton! 
    @IBOutlet weak var numberZero: UIButton! 
    @IBOutlet weak var decimalPoint: UIButton! 
    @IBOutlet weak var plusMinusToggle: UIButton! 
    @IBOutlet weak var acClear: UIButton! 
    @IBOutlet weak var equalButton: UIButton! 
    @IBOutlet weak var multiply: UIButton! 
    @IBOutlet weak var divide: UIButton! 
    @IBOutlet weak var subtraction: UIButton! 
    @IBOutlet weak var addition: UIButton! 
    @IBOutlet weak var deletion: UIButton! 
    @IBOutlet weak var squareRoot: UIButton! 

    var typing:Bool = false 
    var firstNumber: Float = 0.0 
    var secondNumber: Float = 0.0 
    var operation:String = "" 
    var result: Float = 0.0 

    var valueToPass: Float = 0.0 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     number1.layer.cornerRadius = number1.bounds.size.width/8.0 
     number2.layer.cornerRadius = number2.bounds.size.width/8.0 
     number3.layer.cornerRadius = number3.bounds.size.width/8.0 
     number4.layer.cornerRadius = number4.bounds.size.width/8.0 
     number5.layer.cornerRadius = number5.bounds.size.width/8.0 
     number6.layer.cornerRadius = number6.bounds.size.width/8.0 
     number7.layer.cornerRadius = number7.bounds.size.width/8.0 
     number8.layer.cornerRadius = number8.bounds.size.width/8.0 
     number9.layer.cornerRadius = number9.bounds.size.width/8.0 
     numberZero.layer.cornerRadius = numberZero.bounds.size.width/8.0 
     equalButton.layer.cornerRadius = equalButton.bounds.size.width/8.0 
     deletion.layer.cornerRadius = deletion.bounds.size.width/8.0 
     plusMinusToggle.layer.cornerRadius = plusMinusToggle.bounds.size.width/8.0 
     decimalPoint.layer.cornerRadius = decimalPoint.bounds.size.width/8.0 
     acClear.layer.cornerRadius = acClear.bounds.size.width/8.0 
     addition.layer.cornerRadius = addition.bounds.size.width/8.0 
     divide.layer.cornerRadius = divide.bounds.size.width/8.0 
     multiply.layer.cornerRadius = multiply.bounds.size.width/8.0 
     subtraction.layer.cornerRadius = subtraction.bounds.size.width/8.0 
     squareRoot.layer.cornerRadius = squareRoot.bounds.size.width/8.0 
    } 

    override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) { 
     super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator) 

     if (UIDevice.currentDevice().orientation.isLandscape) { 
      print("Device in Lanscape") 
      let newButton1 = UIButton(type: UIButtonType.System) as UIButton 
      newButton1.frame = CGRectMake(100, 100, 100, 50) 
      newButton1.backgroundColor = UIColor.whiteColor() 
      newButton1.center = CGPoint(x: number1.frame.width, y: number1.frame.height) 
      newButton1.layer.cornerRadius = newButton1.bounds.size.width/8.0 
      self.view.addSubview(newButton1) 
     } 
     else{} 
    } 

    @IBAction func numberPressed(sender: AnyObject) { 
     // set the variable "number" to whichever number the user presses 
     let number = sender.currentTitle! 

     if typing { 
      outputDisplay.text = outputDisplay.text! + String(number!) 
     } else { 
      outputDisplay.text = number! 
     } 
     typing = true 
    } 

    @IBAction func calculationPressed(sender: AnyObject) { 
     typing = false 
     firstNumber = Float(outputDisplay.text!)! 
     operation = sender.currentTitle!! 
    } 

    @IBAction func equalPressed(sender: AnyObject) { 
     secondNumber = Float(outputDisplay.text!)! 
     typing = false 

     //arithmetic operations 
     if operation == "+" { 
      result = firstNumber + secondNumber 
     } 
     else if operation == "-" { 
      result = firstNumber - secondNumber 
     } 
     else if operation == "✕" { 
      result = firstNumber * secondNumber 
     } 
     else if operation == "÷" { 
      result = firstNumber/secondNumber 
     } 
//  else if operation == "%" { 
//   result = (firstNumber * secondNumber)/100 
//  } 
     else if operation == "√" { 
      result = sqrt(firstNumber) 
     } 

     outputDisplay.text = "\(result)" 
    } 

    @IBAction func squareRoot(sender: AnyObject) { 
     result = sqrt(Float(outputDisplay.text!)!) 
     outputDisplay.text = "\(result)" 

    } 

    @IBAction func deletePressed(sender: AnyObject) { 
     if outputDisplay.text!.characters.count != 0 { 
      outputDisplay.text = outputDisplay.text!.substringToIndex(outputDisplay.text!.endIndex.predecessor()) 
     } 
     else{ 
      outputDisplay.text = "0" 
     } 

    } 

    @IBAction func plusMinus(sender: AnyObject) { 
     if(outputDisplay.text![outputDisplay.text!.startIndex] == "-"){ 
      outputDisplay.text!.removeAtIndex(outputDisplay.text!.startIndex) 
     }else{ 
      outputDisplay.text!.insert("-", atIndex: outputDisplay.text!.startIndex) 
     } 
    } 


    @IBAction func decimal(sender: AnyObject) { 
     let decimal = sender.currentTitle! 
     outputDisplay.text = outputDisplay.text! + decimal! 
    } 

    @IBAction func clear(sender: AnyObject) { 
     result = 0 
     firstNumber = 0 
     secondNumber = 0 
     outputDisplay.text = "0" 
    } 


    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 


} 

Answer 1

我會用Size Classes做到這一點。您可以使用不同大小的類別在故事板中設計不同的佈局和按鈕排列。如果此應用程序位於iPhone上，則在縱向和縱向高度時使用緊湊寬度和常規高度，在橫向時使用常規寬度。