关于ios:iOS文件操作

文件操作

沙盒门路

NSHomeDirectory()
tmp 长期门路，随时会被删除
Documents 会备份，不容许存储缓存信息

Library

caches 缓存文件
Preferences 偏好设置，能够用来保留账号

获取文件信息

let cachesDictionary = NSSearchPathForDirectoriesInDomains(.cachesDirectory, .userDomainMask, true)[0]
let dist = cachesDictionary.appendingPathComponent("a/b/c.txt")

let fileManager = FileManager.default
do {let attributes = try fileManager.attributesOfItem(atPath: dist)
    let fileSize = attributes[.size] as! UInt64 // 获取文件大小
    print("File size: \(fileSize) bytes")
} catch {print(error)
}

获取某个文件的所有子门路

let subPaths = fileManager.subpaths(atPath: "path")

判断是否是文件夹

var isDirectory: ObjCBool = false
let isExist = fileManager.fileExists(atPath: "path", isDirectory: &isDirectory)