75 lines
2.0 KiB
Swift
75 lines
2.0 KiB
Swift
//
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// GlobalLoadingManager.swift
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// suixinkan
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//
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import UIKit
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/// 全局 Loading 管理器，对齐 Android `GlobalLoadingManager`。
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@MainActor
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final class GlobalLoadingManager {
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static let shared = GlobalLoadingManager()
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private var loadingCount = 0
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private weak var hostWindow: UIWindow?
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private var overlayView: GlobalLoadingOverlayView?
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private init() {}
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/// 当前是否正在展示 Loading。
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var isShowing: Bool {
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loadingCount > 0
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}
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/// 增加 Loading 引用计数并展示遮罩。
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func show() {
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loadingCount += 1
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guard loadingCount == 1 else { return }
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attachOverlayIfNeeded()
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overlayView?.present()
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}
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/// 减少 Loading 引用计数，归零后立即隐藏遮罩。
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func hide() {
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guard loadingCount > 0 else { return }
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loadingCount -= 1
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guard loadingCount == 0 else { return }
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overlayView?.dismiss()
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overlayView?.removeFromSuperview()
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}
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/// 强制关闭所有 Loading。
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func hideAll() {
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loadingCount = 0
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overlayView?.dismiss()
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overlayView?.removeFromSuperview()
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}
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private func attachOverlayIfNeeded() {
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guard let window = keyWindow else { return }
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hostWindow = window
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if overlayView == nil {
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let overlay = GlobalLoadingOverlayView(frame: window.bounds)
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overlay.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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overlay.isHidden = true
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overlayView = overlay
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}
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guard let overlayView else { return }
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if overlayView.superview !== window {
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overlayView.removeFromSuperview()
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window.addSubview(overlayView)
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}
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window.bringSubviewToFront(overlayView)
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}
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private var keyWindow: UIWindow? {
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UIApplication.shared.connectedScenes
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.compactMap { $0 as? UIWindowScene }
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.flatMap(\.windows)
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.first { $0.isKeyWindow }
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}
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}
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