70 lines
2.1 KiB
Swift
70 lines
2.1 KiB
Swift
//
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// ToastCenter.swift
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// suixinkan
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//
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// Created by Codex on 2026/6/18.
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//
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import Observation
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import SwiftUI
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@MainActor
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@Observable
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/// 全局 Toast 状态中心，负责保存和清除当前提示文案。
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final class ToastCenter {
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fileprivate var message: String?
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/// 显示一条全局 Toast 文案。
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func show(_ message: String) {
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self.message = message
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}
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/// 清除当前 Toast 文案。
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func dismiss() {
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message = nil
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}
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}
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/// 全局 Toast 叠加层修饰器，负责把 Toast 展示到页面顶部。
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private struct GlobalToastOverlay: ViewModifier {
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@Environment(ToastCenter.self) private var toastCenter
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func body(content: Content) -> some View {
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content
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.overlay(alignment: .top) {
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if let message = toastCenter.message {
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HStack(spacing: 10) {
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Image(systemName: "exclamationmark.triangle.fill")
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.font(.system(size: 14, weight: .semibold))
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Text(message)
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.font(.system(size: 13, weight: .medium))
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.lineLimit(2)
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Spacer(minLength: 0)
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Button("关闭") {
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toastCenter.dismiss()
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}
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.font(.system(size: 13, weight: .semibold))
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}
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.foregroundStyle(.white)
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.padding(.horizontal, 14)
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.padding(.vertical, 10)
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.background(Color.black.opacity(0.78), in: RoundedRectangle(cornerRadius: 12))
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.padding(.horizontal, 16)
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.padding(.top, 10)
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.transition(.move(edge: .top).combined(with: .opacity))
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}
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}
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.animation(.easeInOut(duration: 0.18), value: toastCenter.message)
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}
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}
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extension View {
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/// 给任意根视图追加全局 Toast 展示能力。
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func globalToastOverlay() -> some View {
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modifier(GlobalToastOverlay())
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}
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}
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