iOS学习之iOS沙盒(sandbox)机制和文件操作
接上篇 iOS学习之iOS沙盒(sandbox)机制和文件操作(一) 我们看看如何获取应用程序沙盒目录。包括真机的沙盒的目录。
1、获取程序的Home目录 [cpp] view plain copy NSString *homeDirectory = NSHomeDirectory(); NSLog(@"path:%@", homeDirectory); 打印结果: [cpp] view plain copy 2012-06-17 14:00:06.098 IosSandbox[3536:f803] /Users/rongfzh/Library/Application Support/iPhone Simulator/5.1/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2 那在真机上的目录有是怎么样的呢？我们看看 2012-06-17 14:25:47.059 IosSandbox[4281:f803] /var/mobile/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2 可见，真机上的目录是/var/mobile/Applications/这个目录下的，和模拟器不一样。这个是Home目录，其他的子目录和模拟器一样。
2、获取document目录 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *path = [paths objectAtIndex:0]; NSLog(@"path:%@", path); 打印结果 [cpp] view plain copy 2012-06-17 14:00:06.099 IosSandbox[3536:f803] path:/Users/rongfzh/Library/Application Support/iPhone Simulator/5.1/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Documents
3、获取Cache目录 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *path = [paths objectAtIndex:0]; NSLog(@"%@", path); 打印结果 [cpp] view plain copy 2012-06-17 14:03:50.431 IosSandbox[3628:f803] /Users/rongfzh/Library/Application Support/iPhone Simulator/5.1/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Library/Caches
4、获取Library目录 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *path = [paths objectAtIndex:0]; NSLog(@"%@", path); 打印结果 [cpp] view plain copy 2012-06-17 14:07:17.544 IosSandbox[3733:f803] /Users/rongfzh/Library/Application Support/iPhone Simulator/5.1/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Library
5、获取Tmp目录 [cpp] view plain copy NSString *tmpDir = NSTemporaryDirectory(); NSLog(@"%@", tmpDir); 打印结果 [cpp] view plain copy 2012-06-17 14:08:07.824 IosSandbox[3782:f803] /var/folders/g7/246bh79130zblw0yjjtc55cw0000gn/T/
6、写入文件 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *docDir = [paths objectAtIndex:0]; if (!docDir) { NSLog(@"Documents 目录未找到"); } NSArray *array = [[NSArray alloc] initWithObjects:@"内容",@"content",nil]; NSString *filePath = [docDir stringByAppendingPathComponent:@"testFile.txt"]; [array writeToFile:filePath atomically:YES]; 注：我们在真机上也运行一下，把文件写入，下一步从真机上把内容读取出来。 写入输入 array ,里面是两个字符串，一会我们读出来打印。 写入我们在程序沙盒目录下看到文件 testFile.txt 打开文件看到的内容是这样的,是个xml格式的plist文件，数据格式保存了内容。 [cpp] view plain copy
内容 content
7、读取文件 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *docDir = [paths objectAtIndex:0]; NSString *filePath = [docDir stringByAppendingPathComponent:@"testFile.txt"]; NSArray *array = [[NSArray alloc]initWithContentsOfFile:filePath]; NSLog(@"%@", array); 打印结果： 把上面的文件解析后，把内容打印出来了。 [cpp] view plain copy 2012-06-17 14:14:46.249 IosSandbox[3918:f803] ( "\U5185\U5bb9", content ) 真机上读取并打印文件路径： 2012-06-17 14:25:47.059 IosSandbox[4281:f803] /var/mobile/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Documents/testFile.txt ( "\U5185\U5bb9", content ) 真机上也能写入和打印。