快速复制文件 [英] Copy file with swift

问题描述

我正在使用此代码复制文件数据库

I am copying a file database with this code

try fileManager.copyItem(atPath: storeURL.path, toPath: storeCopyURL.path)

我可以看到创建了一个新的 sqlite 数据库

I can see that a new sqlite database is created

稍后，当我尝试使用此功能时

later, when I try to use this function

try! sharedInstance.managedObjectStore.addSQLitePersistentStore(atPath: storeURL.path, fromSeedDatabaseAtPath: storeCopyURL.path, withConfiguration: nil, options: nil)

出现错误

E restkit.core_data:RKManagedObjectStore.m:299 复制种子失败来自路径的数据库...

E restkit.core_data:RKManagedObjectStore.m:299 Failed to copy seed database from path ...

推荐答案

要安全地复制文件，您应该使用以下扩展名:

To securely copy a file you should use the following extension:

extension FileManager {

    open func secureCopyItem(at srcURL: URL, to dstURL: URL) -> Bool {
        do {
            if FileManager.default.fileExists(atPath: dstURL.path) {
                try FileManager.default.removeItem(at: dstURL)
            }
            try FileManager.default.copyItem(at: srcURL, to: dstURL)
        } catch (let error) {
            print("Cannot copy item at \(srcURL) to \(dstURL): \(error)")
            return false
        }
        return true
    }

}

有关 CoreData 的任何其他内容，我们需要有关您的代码以及您尝试执行的操作的更多信息.

For anything else regarding CoreData we need more information about your code and what you are trying to do.

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