举例详解iOS开发过程中的沙盒机制与文件

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NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test00.txt"];    
NSString *testPath2 = [testDirectory stringByAppendingPathComponent:@"test22.txt"];    
NSString *testPath3 = [testDirectory stringByAppendingPathComponent:@"test33.txt"];    
  
  
NSString *string = @"写入内容，write String";  
[fileManager createFileAtPath:testPath contents:[string  dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];  
[fileManager createFileAtPath:testPath2 contents:[string  dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];  
[fileManager createFileAtPath:testPath3 contents:[string  dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; 

 

11、获取目录列里所有文件名
两种方法获取：subpathsOfDirectoryAtPath 和subpathsAtPath

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NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    
NSString *documentsDirectory = [paths objectAtIndex:0];    
NSLog(@"documentsDirectory%@",documentsDirectory);    
NSFileManager *fileManage = [NSFileManager defaultManager];    
NSString *myDirectory = [documentsDirectory stringByAppendingPathComponent:@"test"];    
NSArray *file = [fileManage subpathsOfDirectoryAtPath: myDirectory error:nil];   
NSLog(@"%@",file);    
NSArray *files = [fileManage subpathsAtPath: myDirectory ];   
NSLog(@"%@",files); 

 

12、fileManager使用操作当前目录

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//创建文件管理器  
    NSFileManager *fileManager = [NSFileManager defaultManager];  
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
    NSString *documentsDirectory = [paths objectAtIndex:0];  
    //更改到待操作的目录下  
    [fileManager changeCurrentDirectoryPath:[documentsDirectory stringByExpandingTildeInPath]];  
    //创建文件fileName文件名称，contents文件的内容，如果开始没有内容可以设置为nil，attributes文件的属性，初始为nil  
    NSString * fileName = @"testFileNSFileManager.txt";