Swift数据写入文档目录维护目录结构

let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!

let newDirectoryURL = documentDirectory.appendingPathComponent("NewDirectory")
do {
    try FileManager.default.createDirectory(at: newDirectoryURL, withIntermediateDirectories: true, attributes: nil)
} catch {
    print("Failed to create directory: \(error.localizedDescription)")
}

let fileURL = documentDirectory.appendingPathComponent("data.txt")
let data = "Hello, World!".data(using: .utf8)
do {
    try data?.write(to: fileURL)
} catch {
    print("Failed to write data to file: \(error.localizedDescription)")
}

let directoryURL = documentDirectory.appendingPathComponent("Directory")
var isDirectory: ObjCBool = false
if FileManager.default.fileExists(atPath: directoryURL.path, isDirectory: &isDirectory) {
    if isDirectory.boolValue {
        // 目录存在
    } else {
        // 存在同名文件，需要处理冲突
    }
} else {
    // 目录不存在，可以创建
    do {
        try FileManager.default.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil)
    } catch {
        print("Failed to create directory: \(error.localizedDescription)")
    }
}