swift - fileExistsAtPath 检查文件名？

Question

如何判断目录下是否有只有名字没有扩展名的文件？现在文件已写入我的目录，它们的名称将从 id 文件生成。因此，当我在查找文件时，在它所在的目录中让 file = "\(fileId) .pdf"，但如果没有扩展名，将找不到。从服务器返回更容易的扩展？

public var  isDownloaded: Bool {
    let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
    let url = NSURL(fileURLWithPath: path)
    let filePath = url.URLByAppendingPathComponent("\(fileMessageModel.attachment.id)")!.path!
    let fileManager = NSFileManager.defaultManager()
    return fileManager.fileExistsAtPath(filePath)
}

Answer 1

enumeratorAtPath 创建一个深度枚举器——也就是说，它将扫描子文件夹及其子文件夹的内容。对于浅搜索，用户 contentOfDirectortAtPath:

func file(fileName: String, existsAt path: String) -> Bool {
    var isFound = false

    if let pathContents = try? NSFileManager.defaultManager().contentsOfDirectoryAtPath(path) {
        pathContents.forEach { file in
            if (file as NSString).stringByDeletingPathExtension == fileName {
                isFound = true
                return
            }
        }
    }
    return isFound
}

if let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first {
    if file("something", existsAt: path) {
        // The file exists, do something about it
    }
}