feat: Color initializer 추가

WhiteHyun · WhiteHyun · commit 06be7b908376 · 2024-09-05T12:04:41.000+09:00
diff --git a/BoostDesignSystem/Sources/BoostDesignSystem/Sources/Extensions/Color+init.swift b/BoostDesignSystem/Sources/BoostDesignSystem/Sources/Extensions/Color+init.swift
@@ -0,0 +1,50 @@
+//
+//  Color+init.swift
+//
+//
+//  Created by Hyun on 9/5/24.
+//
+
+import SwiftUI
+
+public extension Color {
+
+  /// 16진수 문자열로부터 Color를 초기화합니다.
+  /// - Parameters:
+  ///   - hex: RGB 형식의 16진수 문자열 (예: "FF0000", "#FF0000")
+  ///   - alpha: 불투명도 값 (0.0 ~ 1.0, 기본값 `1.0`)
+  init(_ hex: String, alpha: Double = 1) {
+    let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
+    var int: UInt64 = 0
+    Scanner(string: hex).scanHexInt64(&int)
+    let r, g, b: UInt64
+    switch hex.count {
+    case 6: // RGB - pattern인 경우
+      (r, g, b) = (int >> 16, int >> 8 & 0xFF, int & 0xFF)
+    default:
+      (r, g, b) = (0, 0, 0) // clear color
+    }
+
+    self.init(
+      .sRGB,
+      red: Double(r) / 255,
+      green: Double(g) / 255,
+      blue:  Double(b) / 255,
+      opacity: alpha
+    )
+  }
+
+  /// UInt 타입의 RGB 값으로부터 Color를 초기화합니다.
+  /// - Parameters:
+  ///   - hex: RGB 형식의 UInt 값 (예: 0xFF0000)
+  ///   - alpha: 불투명도 값 (0.0 ~ 1.0, 기본값 `1.0`)
+  init(_ hex: UInt, alpha: Double = 1) {
+    self.init(
+      .sRGB,
+      red: Double(hex >> 16) / 255,
+      green: Double((hex >> 08) & 0xff) / 255,
+      blue: Double(hex & 0xff) / 255,
+      opacity: alpha
+    )
+  }
+}
