• [Swift]iOS开发之目录文件管理


    先获得Documents路径

    class ViewController: UIViewController {
        // MARK: - Properties
        lazy var documentsPath: String = {
            let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
            return paths.first!
        }()
    }
    

     先实现目录的查询、创建与删除吧,⬇️检查目录是否存在⬇️

    func directoryExistsAtPath(path: String) -> Bool {
            let fileManager = NSFileManager.defaultManager()
            let result = fileManager.fileExistsAtPath(path)
            
            if result {
                print("directory exists...")
            } else {
                print("directory not exists...")
            }
            
            return result
        }
    

     ⬇️创建目录⬇️

    func createDirectoryAtPath(path: String) {
            let fileManager = NSFileManager.defaultManager()
            do {
                try fileManager.createDirectoryAtPath(path,
                    withIntermediateDirectories: false, attributes: nil)//path:目录路径,withIntermediateDirectories:告诉系统上级目录是否存在,true表示需要创建多级目录,attributes:文件夹相关属性
            } catch {
                print("create directory failed...")
            }
        }
    

     ⬇️删除目录⬇️

    func deleteDirectoryAtPath(path: String) {
            let fileManager = NSFileManager.defaultManager()
            do {
                try fileManager.removeItemAtPath(path)
            } catch {
                print("delete directory failed...")
            }
        }
    

     再来看看文件的相关操作,其实和目录大同小异

    ⬇️检查文件⬇️

    func fileTest() {
            // ~/Documents/data.txt
            
            // 检查文件是否存在,如果不存在,则创建文件
            let path = "(documentsPath)/data.txt"
            print(path)
            
            if !fileExistsAtPath(path) {
                createFileAtPath(path)
                fileExistsAtPath(path)
            }
            
            // 删除目录
            deleteFileAtPath(path)
            
            // 删除之后,再检查一次
            fileExistsAtPath(path)
        }
        
        func fileExistsAtPath(path: String) -> Bool {
            let fileManager = NSFileManager.defaultManager()
            let result = fileManager.fileExistsAtPath(path)
            
            if result {
                print("file exists...")
            } else {
                print("file not exists...")
            }
            
            return result
        }
    

     ⬇️创建文件⬇️

    func createFileAtPath(path: String) {
            let fileManager = NSFileManager.defaultManager()
            fileManager.createFileAtPath(path, contents: nil, attributes: nil)//path代表文件路径,contents代表想要写入文件的内容,attributes代表文件相关属性
        }
    

     ⬇️删除文件⬇️

    func deleteFileAtPath(path: String) {
            let fileManager = NSFileManager.defaultManager()
            do {
                try fileManager.removeItemAtPath(path)
            } catch {
                print("delete directory failed...")
            }
        }
    

     很容易比较出不同点在于创建和删除时的方法,创建目录是

    .createDirectoryAtPath

    创建文件是

    .createFileAtPath

    删除,呃,删除都是

    .removeItemAtPath

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  • 原文地址:https://www.cnblogs.com/ybw123321/p/5224284.html
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