iOS开发——数据持久化Swift篇&（二）沙盒文件

  1     //******************** 5.2 文件操作
  2     func use_FileOperations()
  3     {
  4         //1、获取程序的Home目录
  5         let homeDirectory = NSHomeDirectory()
  6         println(homeDirectory)
  7         
  8         
  9         //2、获取Documents目录
 10         let documentPaths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
 11         
 12 //        let documentPath = documentPaths[0] as String
 13         
 14          //2015年5月2号修改
 15         let documentPath = documentPaths[0] as! String
 16          println(documentPath)
 17         
 18         //或通过home目录自己追加文件夹
 19         var documentPath2 = homeDirectory + "/Documents"
 20         println(documentPath2)
 21         
 22         //3、获取Library目录
 23         let libraryPaths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.LibraryDirectory, NSSearchPathDomainMask.UserDomainMask, true)
 24 //        let libraryPath = libraryPaths[0] as String
 25         
 26         //2015年5月2号修改
 27         let libraryPath = libraryPaths[0] as! String
 28         
 29         println(libraryPath)
 30         
 31         //或通过home目录自己追加文件夹
 32         var libraryPath2 = homeDirectory + "/Library"
 33         println(libraryPath2)
 34         
 35         
 36         
 37         
 38         //4、获取Cache目录
 39         let cachesPaths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.CachesDirectory, NSSearchPathDomainMask.UserDomainMask, true)
 40 //        let cachesPath = cachesPaths[0] as String
 41         
 42         //2015年5月2号修改
 43         let cachesPath = cachesPaths[0] as! String
 44         println(cachesPath)
 45         
 46         //或通过home目录自己追加文件夹
 47         var cachesPath2 = homeDirectory + "/Library/Caches"
 48         println(cachesPath2)
 49 
 50         
 51         //5、获取Tmp目录
 52         let tmpDir = NSTemporaryDirectory()
 53         println(tmpDir)
 54 
 55         //或通过home目录自己追加文件夹
 56         var tmpDir2 = homeDirectory + "/tmp"
 57         println(tmpDir2)
 58         
 59         
 60         //对于错误信息
 61         var error:NSError?
 62         
 63         // 创建文件管理器
 64         var fileManager :NSFileManager = NSFileManager.defaultManager()
 65         
 66        
 67         //创建目录
 68         //定义几个自己的目录
 69         let myDirectory1:String = NSHomeDirectory() + "/Documents/myFolder/Images"
 70         let myDirectory2:String = NSHomeDirectory() + "/Documents/myFolder/Films"
 71         let myDirectory3:String = NSHomeDirectory() + "/Documents/myFolder/Musics"
 72         let myDirectory4:String = NSHomeDirectory() + "/Documents/myFolder/Files"
 73 
 74         //创建目录
 75         //withIntermediateDirectories 设置成true，代表中间所有的路径目录如果不存在，都会创建
 76         //如果设置成false，因为myFolder目录不存在，所以无法创建1234目录
 77         var isSuccess:Bool = fileManager.createDirectoryAtPath(myDirectory1, withIntermediateDirectories: true, attributes: nil, error: &error)
 78         println(error) //isSuccess=true代表创建成功，如果创建失败，error 会返回错误信息
 79         
 80         fileManager.createDirectoryAtPath(myDirectory2, withIntermediateDirectories: true, attributes: nil, error: &error)
 81         
 82         fileManager.createDirectoryAtPath(myDirectory3, withIntermediateDirectories: true, attributes: nil, error: &error)
 83         
 84         fileManager.createDirectoryAtPath(myDirectory4, withIntermediateDirectories: true, attributes: nil, error: &error)
 85         
 86         
 87         
 88         //创建文件
 89         var filePath = myDirectory1 + "/appInfo.txt"
 90         var info = "经常听到：被中介骗了，押金不退，晚一天交房租，被讹了。租房普遍现象：网上报价不真实？经常被忽悠！（看房时报价都比网上高！）证件不齐全，被骗过!（其实根本不是房东啦!）看房前态度都很热情！ 签约之后态度骤变!入住后家电维修只能靠自己！ 房屋到期，押金各种被勒索！现在开始，你来改变这一切！《租房点评》为你而备，租房无忧！再也不用担心被欺骗，想要知道给你介绍房子的人好不好，《租房点评》告诉你！"
 91         info.writeToFile(filePath, atomically: true, encoding: NSUTF8StringEncoding, error: &error)
 92 
 93         //保存图片
 94         var image = UIImage(named: "SwiftClassWeiXin@3x.png")
 95         var data:NSData = UIImageJPEGRepresentation(image, 1.0)
 96         var data1:NSData = UIImagePNGRepresentation(image)
 97         data.writeToFile(myDirectory1 + "/SwiftClassIcon.jpg", atomically: true)
 98         data1.writeToFile(myDirectory1 + "/SwiftClassIcon.png", atomically: true)
 99         
100         //保存NSArray
101         var array = NSArray(objects: "111","222","333")
102         array.writeToFile(myDirectory4 + "/array.plist", atomically: true)
103         
104         //保存NSDic
105         var dictionary = NSDictionary(objects: ["1111","22222","33333"], forKeys: ["1","2","3"])
106         dictionary.writeToFile(myDirectory4 + "/dictionary.plist", atomically: true)
107         
108         
109         //判断目录或文件是否存在
110         var exist = fileManager.fileExistsAtPath(filePath)
111         println(exist)
112 
113         //移动
114         var filePath2 = myDirectory4 + "/appInfo.txt"
115         fileManager.moveItemAtPath(filePath, toPath: filePath2, error: &error)
116         
117         //重命名
118         //通过移动该文件对文件重命名
119         var filePath3 = myDirectory4 + "/appInfo2.txt"
120         fileManager.moveItemAtPath(filePath2, toPath: filePath3, error: &error)
121         
122         //拷贝
123         var filePath4 = myDirectory4 + "/appInfoCopy.txt"
124         fileManager.copyItemAtPath(filePath3, toPath: filePath4, error: &error)
125         
126         
127         //获取目录列里所有文件名
128         //先赋值一些文件到myDirectory4目录下
129         var filePath00 = myDirectory4 + "/appInfoCopy00.txt"
130         var filePath11 = myDirectory4 + "/appInfoCopy11.txt"
131         var filePath22 = myDirectory4 + "/appInfoCopy22.txt"
132         fileManager.copyItemAtPath(filePath3, toPath: filePath00, error: &error)
133         fileManager.copyItemAtPath(filePath3, toPath: filePath11, error: &error)
134         fileManager.copyItemAtPath(filePath3, toPath: filePath22, error: &error)
135         
136         //获取所有文件
137         var fileArray = fileManager.subpathsAtPath(myDirectory4)
138         println(fileArray)
139 //        Optional([appInfo.txt, appInfo2.txt, appInfoCopy.txt, appInfoCopy00.txt, appInfoCopy11.txt, appInfoCopy22.txt])
140     
141 
142         //IPhone中获取文件各项属性方法
143         //获取文件属性
144         var fileAttributes : [NSObject:AnyObject]? = NSFileManager.defaultManager().attributesOfItemAtPath(filePath22, error: &error)
145         
146         //获取文件的创建日期
147         var modificationDate:AnyObject? = fileAttributes![NSFileModificationDate]
148         println(modificationDate)
149         
150         
151         //获取文件的字节大小
152         var fileSize:AnyObject? = fileAttributes![NSFileSize]
153         println(fileSize)
154         
155         
156         //删除文件
157         fileManager.removeItemAtPath(filePath4, error: &error)
158         
159         //删除目录下所有文件
160         //方法1： 获取所有文件，然后遍历删除
161         var fileArray2 : [AnyObject]? = fileManager.subpathsAtPath(myDirectory4)
162         for fn in fileArray2!
163         {
164             fileManager.removeItemAtPath(myDirectory4 + "/\(fn)", error: &error)
165         }
166         
167         //方法2：删除目录后重新创建该目录
168         fileManager.removeItemAtPath(myDirectory4, error: &error)
169         fileManager.createDirectoryAtPath(myDirectory4, withIntermediateDirectories: true, attributes: nil, error: &error)
170 
171         
172        
173 
174     }