Calculator [STEP 3] Joo, Lust3r

Calculator/Calculator.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		90A26ED9298BB29000A9C749 /* UIStackView+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 90A26ED8298BB29000A9C749 /* UIStackView+Extension.swift */; };
 		C713D9422570E5EB001C3AFC /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = C713D9412570E5EB001C3AFC /* AppDelegate.swift */; };
 		C713D9442570E5EB001C3AFC /* SceneDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = C713D9432570E5EB001C3AFC /* SceneDelegate.swift */; };
 		C713D9462570E5EB001C3AFC /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = C713D9452570E5EB001C3AFC /* ViewController.swift */; };
@@ -35,6 +36,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		90A26ED8298BB29000A9C749 /* UIStackView+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIStackView+Extension.swift"; sourceTree = "<group>"; };
 		C713D93E2570E5EB001C3AFC /* Calculator.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Calculator.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		C713D9412570E5EB001C3AFC /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		C713D9432570E5EB001C3AFC /* SceneDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SceneDelegate.swift; sourceTree = "<group>"; };
@@ -105,6 +107,7 @@
 				D94FF8362974D9B100F7A551 /* CalculateItemQueue.swift */,
 				D94FF84A29751BD500F7A551 /* CalculateItem.swift */,
 				D94BC7B5297670DD00186B6A /* ExpressionParser.swift */,
+				90A26ED8298BB29000A9C749 /* UIStackView+Extension.swift */,
 			);
 			path = Model;
 			sourceTree = "<group>";
@@ -184,7 +187,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 1420;
-				LastUpgradeCheck = 1210;
+				LastUpgradeCheck = 1420;
 				TargetAttributes = {
 					C713D93D2570E5EB001C3AFC = {
 						CreatedOnToolsVersion = 12.1;
@@ -239,6 +242,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				90A26ED9298BB29000A9C749 /* UIStackView+Extension.swift in Sources */,
 				C713D9462570E5EB001C3AFC /* ViewController.swift in Sources */,
 				D94BC7B6297670DD00186B6A /* ExpressionParser.swift in Sources */,
 				C713D9422570E5EB001C3AFC /* AppDelegate.swift in Sources */,
@@ -345,7 +349,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 14.1;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
-				ONLY_ACTIVE_ARCH = NO;
+				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos macosx";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
@@ -463,6 +467,7 @@
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Manual;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = "";
 				GENERATE_INFOPLIST_FILE = YES;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.2;
@@ -488,6 +493,7 @@
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
 				CODE_SIGN_STYLE = Manual;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = "";
 				GENERATE_INFOPLIST_FILE = YES;
 				IPHONEOS_DEPLOYMENT_TARGET = 16.2;

Calculator/Calculator/Controller/ViewController.swift

@@ -7,12 +7,173 @@
 import UIKit
 
 class ViewController: UIViewController {
+    private let zero: String = "0"
+    private let point: String = "."
+    private var calculationFormula: String = "+"
+    private var isDecimal: Bool = false
+    private var isCalculated: Bool = false
+    private var enteredOperand: String = "0"
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view.
     }
 
+    @IBOutlet weak var scrollView: UIScrollView!
+    @IBOutlet weak var operatorLabel: UILabel!
+    @IBOutlet weak var operandLabel: UILabel!
+    @IBOutlet weak var formulaStackViews: UIStackView!
 
-}
+    @IBAction func allClear(_ sender: UIButton) {
+        operandLabel.text?.removeAll()
+        isDecimal = false
+        operatorLabel.text = ""
+        calculationFormula = "+"
+        initializeOperand()
+        formulaStackViews.removeAllArrangedSubviews()
+    }
+
+    @IBAction func clearEntry(_ sender: UIButton) {
+        guard isInitialOperand() == false, enteredOperand != String(Double.nan), isCalculated == false else {
+            return
+        }
+        if enteredOperand.removeLast() == Character(point) {
+            isDecimal = false
+        }
+        guard enteredOperand.isEmpty == false else {
+            initializeOperand()
+            return
+        }
+        operandLabel.text = formattingNumber(enteredOperand)
+    }
+
+    @IBAction func changeSign(_ sender: UIButton) {
+        guard isInitialOperand() == false else {
+            return
+        }
+        if enteredOperand.first == "-" {
+            enteredOperand.removeFirst()
+        } else {
+            enteredOperand = "-" + enteredOperand
+        }
+        operandLabel.text = formattingNumber(enteredOperand)
+    }
+
+    @IBAction func addDecimalPoint(_ sender: UIButton) {
+        guard isDecimal == false, isCalculated == false else {
+            return
+        }
+        enteredOperand += point
+        isDecimal = true
+        operandLabel.text = formattingNumber(enteredOperand) + point
+    }
+
+    @IBAction func addOperand(_ sender: UIButton) {
+        guard let number = sender.currentTitle else {
+            return
+        }
+        if isCalculated {
+            enteredOperand = zero
+            isCalculated = false
+        }
+        guard isInitialOperand() == false || isZero(number) == false else {
+            return
+        }
+        if isInitialOperand() {
+            enteredOperand = number
+        } else {
+            enteredOperand += number
+        }
+        operandLabel.text = convertOperand(enteredOperand)
+    }
+
+    @IBAction func addOperator(_ sender: UIButton) {
+        guard let `operator` = sender.currentTitle,
+              let enteredOperator = operatorLabel.text else {
+            return
+        }
+        guard isInitialOperand() == false else {
+            if calculationFormula == "+" {
+                calculationFormula.removeAll()
+            }
+            operatorLabel.text = `operator`
+            return
+        }
+        if enteredOperand.hasSuffix(point) {
+            enteredOperand += zero
+        }
+        calculationFormula += enteredOperator + enteredOperand
+        addFormulaStackView(operator: enteredOperator, operand: enteredOperand)
+        operatorLabel.text = `operator`
+        initializeOperand()
+        isDecimal = false
+        scrollView.contentOffset.y = scrollView.contentSize.height
+    }
+
+    @IBAction func calculateResult(_ sender: UIButton) {
+        guard let enteredOperator = operatorLabel.text, calculationFormula != "+" else {
+            return
+        }
+        calculationFormula += enteredOperator + enteredOperand
+        operatorLabel.text = ""
+        isDecimal = false
+        isCalculated = true
+        var formula = ExpressionParser.parse(from: calculationFormula)
+        addFormulaStackView(operator: enteredOperator, operand: enteredOperand)
+        enteredOperand = String(formula.result())
+        operandLabel.text = formattingNumber(enteredOperand)
+        calculationFormula = "+"
+        scrollView.contentOffset.y = scrollView.contentSize.height
+    }
 
+    private func addFormulaStackView(`operator`: String, operand: String) {
+        let formulaStackView = UIStackView()
+        let enteredOperatorLabel = UILabel()
+        let enteredOperandLabel = UILabel()
+
+        enteredOperandLabel.text = formattingNumber(operand)
+        enteredOperatorLabel.text = `operator`
+        enteredOperandLabel.textColor = .white
+        enteredOperatorLabel.textColor = .white
+        formulaStackView.axis = .horizontal
+        formulaStackView.spacing = 8
+        formulaStackView.addArrangedSubview(enteredOperatorLabel)
+        formulaStackView.addArrangedSubview(enteredOperandLabel)
+
+        formulaStackViews.addArrangedSubview(formulaStackView)
+    }
+
+    private func formattingNumber(_ number: String) -> String {
+        let formatter = NumberFormatter()
+        formatter.maximumFractionDigits = 20
+        formatter.numberStyle = .decimal
+        return formatter.string(for: Double(number)) ?? number
+    }
+
+    private func convertOperand(_ operand: String) -> String {
+        if let indexOfPoint = operand.firstIndex(of: Character(point)) {
+            let integerOfOperand = String(operand[operand.startIndex..<indexOfPoint])
+            var decimalOfOperand: String
+            if operand.distance(from: indexOfPoint, to: operand.endIndex) > 20 {
+                let twentyIndex = operand.index(indexOfPoint, offsetBy: 20)
+                decimalOfOperand = String(operand[indexOfPoint...twentyIndex])
+            } else {
+                decimalOfOperand = String(operand[indexOfPoint..<operand.endIndex])
+            }
+            return formattingNumber(integerOfOperand) + decimalOfOperand
+        }
+        return formattingNumber(operand)
+    }
+
+    private func isInitialOperand() -> Bool {
+        return enteredOperand == zero
+    }
+
+    private func isZero(_ value: String) -> Bool {
+        return value == zero || value == "00"
+    }
+
+    private func initializeOperand() {
+        enteredOperand = zero
+        operandLabel.text = zero
+    }
+}

Calculator/Calculator/Model/CalculateItem.swift

@@ -13,9 +13,9 @@ protocol CalculateItem {
 
 enum Operator: Character, CalculateItem, CaseIterable {
     case add = "+"
-    case subtract = "-"
-    case divide = "/"
-    case multiply = "*"
+    case subtract = "−"
+    case divide = "÷"
+    case multiply = "×"
 
     func calculate(lhs: Double, rhs: Double) -> Double {
         switch self {

Calculator/Calculator/Model/UIStackView+Extension.swift

@@ -0,0 +1,17 @@
+//
+//  UIStackView+Extension.swift
+//  Calculator
+//
+//  Created by 박재우 on 2023/02/02.
+//
+
+import UIKit
+
+extension UIStackView {
+    func removeAllArrangedSubviews() {
+        arrangedSubviews.forEach {
+            self.removeArrangedSubview($0)
+            $0.removeFromSuperview()
+        }
+    }
+}