小编Rai*_*kas的帖子

我看过Explore structured concurrency in Swift视频和我能找到的其他相关视频/文章/书籍（Sundell 的 swift、用 swift 进行黑客攻击、Ray Renderlich），但所有示例都非常琐碎 - 异步函数通常只有 1 个异步调用。这在现实生活中的代码中应该如何工作？

例如：

...
        task = Task {
            var longRunningWorker: LongRunningWorker? = nil

            do {
                var fileURL = state.fileURL
                if state.needsCompression {
                    longRunningWorker = LongRunningWorker(inputURL: fileURL)
                    fileURL = try await longRunningWorker!.doAsyncWork()
                }

                let urls = try await ApiService.i.fetchUploadUrls()

                if let image = state.image, let imageData = image.jpegData(compressionQuality: 0.8) {
                    guard let imageUrl = urls.signedImageUrl else {
                        fatalError("Cover art supplied but art upload URL is nil")
                    } …