IOS learning-sandbox path summary, file management NSFileManager summary, Sandbox nsfilemanager

IOS learning-sandbox path summary, file management NSFileManager summary, Sandbox nsfilemanager

//

// ViewController. m

// Sandbox operation

//

// Created by mncong on 15/11/26.

// Copyright©2015 mancong. All rights reserved.

//

 

# Import "ViewController. h"

 

@ Interface ViewController ()

 

@ End

 

@ Implementation ViewController

 

-(Void) viewDidLoad {

[Super viewDidLoad];

 

// Reach the sandbox root path

[Self getHomePath];

// Obtain the Document path

[Self getDocumentsPath];

// Obtain the Library directory path

[Self getLibraryPath];

// Obtain the Cache path in the Library

[Self getCachePath];

// Obtain the temp path

[Self getTempPath];

// NSString class path Processing

[Self dealWithPath];

// NSData Processing

[Self dealWithData];

// File Management

[Self dealWithNSaFileManager];

// Obtain the list of files and files in the file

[Self getDirectorys];

}

 

-(Void) getHomePath

{

NSString * homePath = NSHomeDirectory ();

NSLog (@ "app_home: % @", homePath );

}

 

-(NSString *) getDocumentsPath

{

NSArray * pathsArr = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES );

NSLog (@ "% @", pathsArr );

NSString * documentsPath = [pathsArr lastObject];

NSLog (@ "app_documentsPath: % @", documentsPath );

Return documentsPath;

}

-(Void) getLibraryPath

{

NSArray * pathsArr = NSSearchPathForDirectoriesInDomains (NSLibraryDirectory, NSUserDomainMask, YES );

NSString * documentsPath = [pathsArr lastObject];

NSLog (@ "app_documentsPath: % @", documentsPath );

}

-(Void) getCachePath

{

NSArray * pathsArr = NSSearchPathForDirectoriesInDomains (NSCachesDirectory, NSUserDomainMask, YES );

NSString * cachePath = [pathsArr lastObject];

NSLog (@ "cachePath: % @", cachePath );

}

-(Void) getTempPath

{

NSString * tempPath = NSTemporaryDirectory ();

NSLog (@ "app_tempPath: % @", tempPath );

}

-(Void) dealWithPath

{

// Operation path

NSString * path = @ "/Users/apple/testfile. text ";

// Obtain the components of this path

NSArray * arr = [path pathComponents];

NSLog (@ "% @", arr );

// Extract the last part of this path

NSString * lastComponent = [path lastPathComponent];

NSLog (@ "% @", lastComponent );

// Delete the last part of the path

NSString * deleteLastComponent = [path stringByDeletingLastPathComponent];

NSLog (@ "% @", deleteLastComponent );

// Add the path to the end of the first mail path

NSString * addPathToPath = [path stringByAppendingPathComponent: path];

NSLog (@ "% @", addPathToPath );

// Remove the extension of the last part of the path

NSString * extension = [path pathExtension];

NSLog (@ "% @", extension );

// Delete the extension of the last part of the path

NSString * deletePathExtension = [path stringByDeletingPathExtension];

NSLog (@ "% @", deletePathExtension );

// Append the extension to the last part of the path. (Note: The method has already been spliced with a dot. Do not add the dot)

NSString * appendExtension = [path stringByAppendingPathExtension: @ "jpg"];

NSLog (@ "% @", appendExtension );

}

-(Void) dealWithData

{

// 1. NSString and NSData Conversion

NSString * string1 = @ "1234 abcd ";

NSData * data1 = [string1 dataUsingEncoding: NSUTF8StringEncoding];

NSLog (@ "data1: % @", data1 );

NSString * string2 = [[NSString alloc] initWithData: data1 encoding: NSUTF8StringEncoding];

NSLog (@ "string2: % @", string2 );

// 2. NSData and UIImage

// Link the path under the project

NSString * path = [[NSBundle mainBundle] bundlePath];

NSString * name = [NSString stringWithFormat: @ "1.jpg"];

NSString * finalPath = [path stringByAppendingPathComponent: name];

// Change the path to the NSData type

NSData * imageData = [NSData dataWithContentsOfFile: finalPath];

// Obtain the image

UIImage * image = [UIImage imageWithData: imageData];

// Display on UIimageView

UIImageView * imageView = [[UIImageView alloc] initWithFrame: CGRectMake (0, 0, [UIScreen mainScreen]. bounds. size. width, 200)];

ImageView. image = image;

[Self. view addSubview: imageView];

}

-(Void) dealWithNSaFileManager

{

NSError * error;

// Create File Management

NSFileManager * fileManager = [NSFileManager defaultManager];

// Point to the document directory

NSString * documentsDirectory = [NSHomeDirectory () stringByAppendingPathComponent: @ "Documents"];

NSLog (@ "documentsDirectory: % @", documentsDirectory );

// Create a directory

# What is the meaning after warning format and the following parameters?

[[NSFileManager defaultManager] createDirectoryAtPath: [NSString stringWithFormat: @ "% @/myFolder", NSHomeDirectory ()] withIntermediateDirectories: YES attributes: nil error: & error];

// 1. Create a file

NSString * filePath = [documentsDirectory stringByAppendingPathComponent: @ "file1.txt"];

NSLog (@ "filePath: % @", filePath );

NSString * str = @ "string to be written ";

// Write a file

[Str writeToFile: filePath atomically: YES encoding: NSUTF8StringEncoding error: & error];

// Display the contents of the file directory

NSLog (@ "documentsDirectory: % @", [fileManager contentsOfDirectoryAtPath: documentsDirectory error: & error]);

// 2. rename a file

NSString * filePath2 = [documentsDirectory stringByAppendingPathComponent: @ "file2.text"];

NSLog (@ "% @", filePath2 );

If ([fileManager moveItemAtPath: filePath toPath: filePath2 error: & error]! = YES)

NSLog (@ "Unable to mnove file: % @", error. localizedDescription );

NSLog (@ "DocumentsDirectory: % @", [fileManager contentsOfDirectoryAtPath: documentsDirectory error: & error]);

 

// 3. delete an object

If ([fileManager removeItemAtPath: filePath2 error: & error]! = YES)

NSLog (@ "Unable to delete file: % @", error. localizedDescription );

NSLog (@ "Documentsdirectory: % @", [fileManager contentsOfDirectoryAtPath: documentsDirectory error: & error]);

}

-(Void) getDirectorys

{

NSFileManager * fileManager = [NSFileManager defaultManager];

NSArray * documentsPaths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES );

NSString * documentsDirectory = [documentsPaths objectAtIndex: 0];

NSError * error = nil;

NSArray * fileList = [NSArray array];

FileList = [fileManager contentsOfDirectoryAtPath: documentsDirectory error: & error];

NSLog (@ "fileList: % @", fileList );

// List all subfolders in a given folder

NSMutableArray * dirArray = [NSMutableArray array];

BOOL isDir = NO;

For (NSString * file in fileList ){

NSString * path = [documentsDirectory stringByAppendingPathComponent: file];

[FileManager fileExistsAtPath: path isDirectory :( & isDir)];

If (isDir ){

[DirArray addObject: file];

}

IsDir = NO;

}

NSLog (@ "Every Thing in the Dir: % @", fileList );

NSLog (@ "All folders: % @", dirArray );

}

 

@ End