iOS开发——数据持久化Swift篇&（二）沙盒文件

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: "[email protected]")

 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     }

 

 

 1         //1:C函数

 2         var path = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)//第一个和第二个参数还有其他一些对应的选项，第三个参数就是～的表示(false-不展开～：...../User)

 3         var documentsDirectory = path[0] as! String

 4         println(documentsDirectory)

 5         /**

 6         /Users/icocos/Library/Developer/CoreSimulator/Devices/BFD7850E-8B04-4710-B0CD-462FAB5F1035/data/Containers/Data/Application/B253FB89-3AA8-41C8-AE94-F820F856C06F/Documents

 7         */

 8         

 9         

10         var temp = NSTemporaryDirectory()

11         println(temp)

12         /**

13         /Users/icocos/Library/Developer/CoreSimulator/Devices/BFD7850E-8B04-4710-B0CD-462FAB5F1035/data/Containers/Data/Application/28CCDDA9-E804-4251-8BF9-EF68866F52C5/tmp/

14         */

15         

16         //******************************

17         

18         

19         

20         //2:ios方法FileManager.这个使用更多，因为他还有很多的功能，就是我们下面的方法的使用

21         var filemanager = NSFileManager.defaultManager()

22         var documentDirectoryWithIOS = filemanager.URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask)

23         println(documentDirectoryWithIOS)

24         /**

25         [file:///Users/icocos/Library/Developer/CoreSimulator/Devices/BFD7850E-8B04-4710-B0CD-462FAB5F1035/data/Containers/Data/Application/B253FB89-3AA8-41C8-AE94-F820F856C06F/Documents/]

26         */

27         

28