SwiftUI中FileManager.copyItem报错「文件不存在」求助

问题描述 #

我是SwiftUI初学者，正在练习用LLMFarm Core搭建本地大语言模型。执行代码try FileManager.default.copyItem(atPath: temporaryURL.path, toPath: fileURL.path)时，出现错误：Error: The file “CFNetworkDownload_rr8uC6.tmp” doesn’t exist.，推测问题出在temporaryURL变量上。

相关代码 #

status = "downloading"
print("Downloading model \(modelName) from \(modelUrl)")
guard let url = URL(string: modelUrl) else { return }
let fileURL = getFileURLFormPathStr(dir:"models",filename: filename)
downloadTask = URLSession.shared.downloadTask(with: url) { temporaryURL, response, error in
    if let error = error {
        return
    }
    guard let response = response as? HTTPURLResponse, (200...299).contains(response.statusCode) else {
        print("Server error!")
        return
    }
    do {
        if let temporaryURL = temporaryURL {
            try FileManager.default.copyItem(atPath: temporaryURL.path, toPath: fileURL.path)

已尝试的操作 #

• 替换为try FileManager.default.copyItem(at: temporaryURL, to: fileURL)，问题未解决
• 参照LLMFarm示例完成所有权限配置和Info.plist属性设置
• 在个人设备和M1电脑上测试，均出现相同错误
• 在if let temporaryURL = temporaryURL上方添加判断if !FileManager.default.fileExists(atPath: fileURL.path)，确认目标文件存在，但报错依旧

补充信息 #

• temporaryURL的值：file:///Users/salman/Library/Containers/com.guinmoon.LLMFarm23/Data/tmp/CFNetworkDownload_QfLexg.tmp
• fileURL的值：file:///Users/salman/Library/Containers/com.guinmoon.LLMFarm23/Data/Documents/models/tinyllama-1.1b-chat-v1.0.Q4_K_M.gguf
• 代码仓库可直接克隆测试

内容的提问来源于stack exchange，提问作者salman mallick