joywayerandClaude Opus 4.7
8e4c36d1c8
按 msext gameController.m:637-678 字面行为，WechatShare 按 content.type 分发： - type=1 → shareLink（已有） - type=2 → captureScreenshot → JPEG 0.6 + thumb 0.4x → shareImage - type=其它 → downloadRemote(URL) → JPEG 0.9 + thumb 0.4x → shareImage 新增： - ImageProvider.scaledThumb(_:scale:)：等价 msext FuncPublic imageByScalingAndCroppingForSize 0.4x 缩放；微信 SDK setThumbImage: 内部再压到 32KB - WeChatManager.ShareImage 结构 + shareImage(_:scene:) 异步包装 （WXImageObject + WXMediaMessage.setThumbImage，FIFO 串行复用 sharePending） 契约：与 type=1 一致，调成功 → sharesuccess 反向 callback（success/cancelled 都发）；errCode=-2 → cancelled；其它 errCode → failed。 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
76 lines
2.7 KiB
Swift
76 lines
2.7 KiB
Swift
//
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// ImageProvider.swift
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// ylgamehall
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//
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// 分享场景的图片源 helper：
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// - captureScreenshot() 截当前 keyWindow（与 msext FuncPublic
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// getImageWithFullScreenshot 等价）
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// - downloadRemote(_:) URLSession 异步下载远端图片 URL
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//
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// Phase 4.F 截图 / 远端图分享共用。
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//
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import UIKit
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public enum ImageProviderError: Error, Sendable {
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case noKeyWindow
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case downloadFailed(any Error)
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case decodeFailed
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case badURL(String)
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}
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@MainActor
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public enum ImageProvider {
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/// 截当前 keyWindow（与 msext `getImageWithFullScreenshot` 等价）。
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/// 返回包含状态栏 + 大厅 letterbox 黑边 + WebView 内容的完整快照。
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public static func captureScreenshot() throws -> UIImage {
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guard let window = UIApplication.shared.connectedScenes
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.compactMap({ $0 as? UIWindowScene })
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.flatMap(\.windows)
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.first(where: { $0.isKeyWindow })
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else {
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throw ImageProviderError.noKeyWindow
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}
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let renderer = UIGraphicsImageRenderer(bounds: window.bounds)
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return renderer.image { _ in
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window.drawHierarchy(in: window.bounds, afterScreenUpdates: false)
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}
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}
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/// 等比缩放图片用作微信分享的缩略图源。默认 0.4x 与 msext
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/// `imageByScalingAndCroppingForSize:CGSizeMake(w*0.4, h*0.4)` 等价
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/// （gameController.m:656 / 677 字面常量）。微信 SDK `setThumbImage:`
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/// 内部会再压缩至 32KB，外层只需把图像尺寸压低，避免传 4K 截图过 SDK 时
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/// 内部 JPEG 编码出超大缩略图。
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public static func scaledThumb(_ image: UIImage, scale: CGFloat = 0.4) -> UIImage {
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let target = CGSize(
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width: max(1, image.size.width * scale),
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height: max(1, image.size.height * scale)
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)
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let renderer = UIGraphicsImageRenderer(size: target)
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return renderer.image { _ in
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image.draw(in: CGRect(origin: .zero, size: target))
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}
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}
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/// 下载远端 URL → UIImage。仅简单 URLSession 同步路径，无重试 / 缓存。
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public static func downloadRemote(_ urlString: String) async throws -> UIImage {
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guard let url = URL(string: urlString) else {
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throw ImageProviderError.badURL(urlString)
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}
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do {
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let (data, _) = try await URLSession.shared.data(from: url)
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guard let image = UIImage(data: data) else {
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throw ImageProviderError.decodeFailed
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}
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return image
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} catch let err as ImageProviderError {
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throw err
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} catch {
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throw ImageProviderError.downloadFailed(error)
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}
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}
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}
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