iOS學習之iOS沙箱(sandbox)機制和檔案操作1

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iOS學習之iOS沙箱(sandbox)機制和檔案操作

 

接上篇 iOS學習之iOS沙箱(sandbox)機制和檔案操作(一) 我們看看如何擷取應用程式沙箱目錄。包括真機的沙箱的目錄。

1、擷取程式的Home目錄 [cpp] view plain copy NSString *homeDirectory = NSHomeDirectory(); NSLog(@"path:%@", homeDirectory); 列印結果: [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 那在真機上的目錄有是怎麼樣的呢？我們看看 2012-06-17 14:25:47.059 IosSandbox[4281:f803] /var/mobile/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2 可見，真機上的目錄是/var/mobile/Applications/這個目錄下的，和模擬器不一樣。這個是Home目錄，其他的子目錄和模擬器一樣。

 

2、擷取document目錄 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *path = [paths objectAtIndex:0]; NSLog(@"path:%@", path); 列印結果 [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、擷取Cache目錄 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *path = [paths objectAtIndex:0]; NSLog(@"%@", path); 列印結果 [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、擷取Library目錄 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *path = [paths objectAtIndex:0]; NSLog(@"%@", path); 列印結果 [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、擷取Tmp目錄 [cpp] view plain copy NSString *tmpDir = NSTemporaryDirectory(); NSLog(@"%@", tmpDir); 列印結果 [cpp] view plain copy 2012-06-17 14:08:07.824 IosSandbox[3782:f803] /var/folders/g7/246bh79130zblw0yjjtc55cw0000gn/T/

 

6、寫入檔案 [cpp] view plain copy NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *docDir = [paths objectAtIndex:0]; if (!docDir) { NSLog(@"Documents 目錄未找到"); } NSArray *array = [[NSArray alloc] initWithObjects:@"內容",@"content",nil]; NSString *filePath = [docDir stringByAppendingPathComponent:@"testFile.txt"]; [array writeToFile:filePath atomically:YES]; 註：我們在真機上也運行一下，把檔案寫入，下一步從真機上把內容讀取出來。 寫入輸入 array ,裡面是兩個字串，一會我們讀出來列印。 寫入我們在程式沙箱目錄下看到檔案 testFile.txt 開啟檔案看到的內容是這樣的,是個xml格式的plist檔案，資料格式儲存了內容。 [cpp] view plain copy

 

內容 content

 

7、讀取檔案 [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); 列印結果： 把上面的檔案解析後，把內容列印出來了。 [cpp] view plain copy 2012-06-17 14:14:46.249 IosSandbox[3918:f803] ( "\U5185\U5bb9", content ) 真機上讀取並列印檔案路徑： 2012-06-17 14:25:47.059 IosSandbox[4281:f803] /var/mobile/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Documents/testFile.txt ( "\U5185\U5bb9", content ) 真機上也能寫入和列印。

iOS學習之iOS沙箱(sandbox)機制和檔案操作1