iOSでiCloud Driveにアクセスする方法(Swift)

file.swift

    func createDocumentsFolder() {
        // iCloudコンテナのURL
        let url = FileManager.default.url(forUbiquityContainerIdentifier: nil)
        let path = (url?.appendingPathComponent("Documents"))!
        do {
            try FileManager.default.createDirectory(at: path, withIntermediateDirectories: true, attributes: nil)
        } catch let error as NSError {
            print(error)
        }
        
	// テキストファイルをつくってみる
        let fileURL = getDocumentsPath("README.txt")
        let todayText = "POWER TO MAKE YOUR DREAM COME TRUE."
        if ( FileManager.default.fileExists( atPath: fileURL!.path ) == true ) {
        } else {
            do {
                try todayText.write(to: fileURL!, atomically: true, encoding: .utf8)
            }
            catch {
                print("write error")
            }
        }
    }