feat: 토스트 구현

Author: opficdev

DevLog/UI/Common/Componeent/Toast.swift

@@ -0,0 +1,128 @@
+//
+//  Toast.swift
+//  DevLog
+//
+//  Created by 최윤진 on 2/10/26.
+//
+
+import SwiftUI
+
+extension View {
+    func toast(
+        isPresented: Binding<Bool>,
+        duration: TimeInterval = 2,
+        message: String,
+        action: (() -> Void)? = nil
+    ) -> some View {
+        self
+            .frame(maxWidth: .infinity, maxHeight: .infinity)
+            .overlay(alignment: .bottom) {
+                ToastOverlayView(
+                    isPresented: isPresented,
+                    duration: duration,
+                    message: message,
+                    action: action
+                )
+                .foregroundStyle(action == nil ? Color(.label) : .blue)
+                .padding(.horizontal, 12)
+            }
+    }
+}
+
+private struct ToastOverlayView: View {
+    @Binding var isPresented: Bool
+    let duration: TimeInterval
+    let message: String
+    let action: (() -> Void)?
+
+    @State private var yOffset: CGFloat = 0
+    @State private var opacityValue: Double = 0
+    @State private var dismissWorkItem: DispatchWorkItem?
+
+    var body: some View {
+        if isPresented {
+            ToastCardView(message)
+                .offset(y: yOffset)
+                .opacity(opacityValue)
+                .onAppear {
+                    presentAnimated()
+                    scheduleDismiss()
+                }
+                .onDisappear {
+                    dismissWorkItem?.cancel()
+                    dismissWorkItem = nil
+                    isPresented = false
+                }
+                .onTapGesture {
+                    dismissAnimated()
+                    action?()
+                }
+                .transition(.identity)
+        }
+    }
+
+    private func presentAnimated() {
+        dismissWorkItem?.cancel()
+        dismissWorkItem = nil
+
+        withAnimation(.spring(response: 0.5, dampingFraction: 1, blendDuration: 0.0)) {
+            yOffset = -100
+            opacityValue = 1
+        }
+    }
+
+    private func scheduleDismiss() {
+        let workItem = DispatchWorkItem {
+            dismissAnimated()
+        }
+        dismissWorkItem = workItem
+        DispatchQueue.main.asyncAfter(deadline: .now() + duration, execute: workItem)
+    }
+
+    private func dismissAnimated() {
+        dismissWorkItem?.cancel()
+        dismissWorkItem = nil
+
+        withAnimation(.easeInOut(duration: 0.2)) {
+            yOffset = 0
+            opacityValue = 0
+        }
+
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
+            isPresented = false
+        }
+    }
+}
+
+private struct ToastCardView: View {
+    let message: String
+
+    init(_ message: String) {
+        self.message = message
+    }
+
+    var body: some View {
+        Text(message)
+            .font(.caption)
+            .multilineTextAlignment(.center)
+            .lineLimit(3)
+            .padding(.vertical, 12)
+            .padding(.horizontal, 14)
+            .background {
+                if #available(iOS 26.0, *) {
+                    RoundedRectangle(cornerRadius: 16, style: .continuous)
+                        .glassEffect()
+                } else {
+                    RoundedRectangle(cornerRadius: 16, style: .continuous)
+                        .fill(.ultraThinMaterial)
+                }
+            }
+            .overlay {
+                if #unavailable(iOS 26.0) {
+                    RoundedRectangle(cornerRadius: 16, style: .continuous)
+                        .strokeBorder(Color(.systemGray4).opacity(0.2), lineWidth: 1)
+                }
+            }
+            .shadow(color: Color(.systemGray2).opacity(0.4), radius: 18, x: 0, y: 10)
+    }
+}