IOS: folder management, file operations, ios folder management operations

IOS: folder management, file operations, ios folder management operations

Native, do not know whether it will be used, the previous notes.

 

=============================== Folder management ======================== =

 

1. Obtain the Document Manager ticket

NSFileManager *fileManager = [NSFileManager defaultManager];

2. Use a manager to create a folder

// Path: name of the folder to be created. The folder name has no suffix [fileManager createDirectoryAtPath: path withIntermediateDirectories: YES attributes: nil error: & error]

3. Create a file

// FilePath: The file created in the previous folder, which is "xxx. xxx" data to be encoded [fileManager createFileAtPath: filePath contents: data attributes: nil]

4. Read File Information

// Returns the dictionary [fileManager attributesOfItemAtPath: filePath error: & error]

5. Read the dictionary information returned by the file

[infoDic objectForKey:@"NSFileSize"]

6. File Reading

6-1), Method 1:

// Read NSDataNSData * newData = [fileManager contentsAtPath: filePath]; // decode [[NSString alloc] initWithData: newData encoding: NSUTF8StringEncoding];

6-2), Method 2:

[[NSString alloc]initWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:&error];

7. File Movement (cut and rename)

// The file name is suffixed with "xxx. xx" [fileManager moveItemAtPath: oldPath toPath: newPath error: & error]

8. File Replication

// The file name is suffixed with "xxx. xx" [fileManager copyItemAtPath: oldPath toPath: newPath error: & error]

9. delete a file

// The file name is suffixed with "xxx. xx" 1. First, check whether there is a file [fileManager fileExistsAtPath: oldPath] 2. Delete [fileManager removeItemAtPath: oldPath error: & error]

　　

================================ File Operations ============================ =