Phase 4.F：微信截图分享 type=2 / 远端图分享 type=其它
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>
This commit is contained in:
joywayer
co-authored by
Claude Opus 4.7
Claude Opus 4.7
parent
d9d9554d9f
commit
8e4c36d1c8
@@ -69,6 +69,19 @@ public final class WeChatManager: NSObject {
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}
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}
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/// 图片分享载荷（type=2 截图 / type=3 远端图）。
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/// imageData 是大图原始字节（JPEG 等），thumb 是缩略图源 — SDK
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/// `setThumbImage:` 内部把 thumb 压到 32KB。
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public struct ShareImage {
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public let imageData: Data
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public let thumb: UIImage
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public init(imageData: Data, thumb: UIImage) {
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self.imageData = imageData
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self.thumb = thumb
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}
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}
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/// 链接分享（FIFO 串行）。微信回包不携带配对 ID，连续调时按入队顺序消费。
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public func shareLink(_ link: ShareLink, scene: ShareScene) async throws {
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#if canImport(WechatOpenSDK)
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@@ -97,6 +110,35 @@ public final class WeChatManager: NSObject {
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#endif
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}
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/// 图片分享（FIFO 串行，复用 sharePending）。msext gameController.m:637-678
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/// type=2 截图 / type=其它 远端图 共用同一条 WXImageObject + setThumbImage 路径。
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public func shareImage(_ img: ShareImage, scene: ShareScene) async throws {
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#if canImport(WechatOpenSDK)
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try await withCheckedThrowingContinuation { (cont: CheckedContinuation<Void, Error>) in
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sharePending.append(cont)
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let media = WXImageObject()
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media.imageData = img.imageData
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let message = WXMediaMessage()
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// 图片分享不需要 title / description（msext 字面：传 nil；这里传空串等价）
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message.mediaObject = media
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message.setThumbImage(img.thumb)
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let req = SendMessageToWXReq()
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req.bText = false
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req.message = message
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switch scene {
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case .session: req.scene = Int32(WXSceneSession.rawValue)
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case .timeline: req.scene = Int32(WXSceneTimeline.rawValue)
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}
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WXApi.send(req)
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}
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#else
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throw WeChatError.sdkNotLinked
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#endif
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}
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// MARK: - Internal: resolve callbacks
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fileprivate func resolveAuth(state: String, code: String?, errCode: Int) {
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@@ -39,6 +39,22 @@ public enum ImageProvider {
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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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@@ -9,6 +9,7 @@
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//
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import Foundation
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import UIKit
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#if canImport(WechatOpenSDK)
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import WechatOpenSDK
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@@ -37,18 +38,44 @@ public final class WechatShare: SharePlatform {
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return .notInstalled(platform: name)
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}
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let wxScene: WeChatManager.ShareScene = (scene == .timeline) ? .timeline : .session
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// 当前仅链接分享（type == "1"）走真实 SDK；截图 / 远端图分享待 Phase 4.F 接入
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// WXImageObject + WXMediaMessage.thumbData
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do {
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try await WeChatManager.shared.shareLink(
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.init(
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url: content.webpageUrl,
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title: content.title,
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desc: content.desc,
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thumbnailURL: nil // type=2/3 缩略图待 Phase 4.F
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),
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scene: wxScene
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)
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switch content.type {
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case "1":
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// 链接分享（msext gameController.m:613-635）
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try await WeChatManager.shared.shareLink(
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.init(
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url: content.webpageUrl,
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title: content.title,
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desc: content.desc,
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thumbnailURL: nil
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),
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scene: wxScene
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)
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case "2":
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// 截图分享（msext gameController.m:637-658）
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let shot = try ImageProvider.captureScreenshot()
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guard let imageData = shot.jpegData(compressionQuality: 0.6) else {
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return .failed(reason: "screenshot JPEG encode failed")
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}
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let thumb = ImageProvider.scaledThumb(shot)
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try await WeChatManager.shared.shareImage(
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.init(imageData: imageData, thumb: thumb),
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scene: wxScene
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)
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default:
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// 远端图分享（msext gameController.m:659-680：type 是其它值就当 URL 远端图）
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let remote = try await ImageProvider.downloadRemote(content.webpageUrl)
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// msext 直接用原始 data 作为大图；这里 UIImage 已是 decode 后的，
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// 用 jpegData 重新编码维持等价（避免持有未压缩的原始字节膨胀）。
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guard let imageData = remote.jpegData(compressionQuality: 0.9) else {
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return .failed(reason: "remote image JPEG encode failed")
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}
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let thumb = ImageProvider.scaledThumb(remote)
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try await WeChatManager.shared.shareImage(
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.init(imageData: imageData, thumb: thumb),
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scene: wxScene
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)
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}
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return .success
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} catch let WeChatError.shareFailed(errCode) {
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if errCode == -2 { return .cancelled }
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