feat/#176 :: hex code 기반 UIColor initializer 생성

Co-Authored-By: seuhong <[email protected]>

Author: 0Hooni

PhotoGether/PresentationLayer/DesignSystem/DesignSystem/Source/UIColor+.swift

@@ -0,0 +1,26 @@
+import UIKit
+
+public extension UIColor {
+    convenience init(hex: String) {
+        let hexString = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
+        var int = UInt64()
+        Scanner(string: hexString).scanHexInt64(&int)
+        
+        let red, green, blue, alpha: UInt64
+        switch hexString.count {
+        case 6: // 6자리 (RGB)
+            (red, green, blue, alpha) = ((int >> 16) & 0xFF, (int >> 8) & 0xFF, int & 0xFF, 0xFF)
+        case 8: // 8자리 (RGBA)
+            (red, green, blue, alpha) = ((int >> 24) & 0xFF, (int >> 16) & 0xFF, (int >> 8) & 0xFF, int & 0xFF)
+        default:
+            (red, green, blue, alpha) = (0, 0, 0, 0xFF) // 유효하지 않은 경우 기본값
+        }
+        
+        self.init(
+            red: CGFloat(red) / 255.0,
+            green: CGFloat(green) / 255.0,
+            blue: CGFloat(blue) / 255.0,
+            alpha: CGFloat(alpha) / 255.0
+        )
+    }
+}