Management of iOS files (add, delete, copy, move)

#import "ViewController.h"

@implementation Viewcontroller

-(void) Viewdidload {

[Super Viewdidload];

[Self handlensfilemanage];

}

File Management

-(void) handlensfilemanage{

Nsfilemanager is a singleton class, which we call a file management class, is a tool designed to manage files, the main functions are: File additions, file deletion, file movement, file copy;

Create a file Management object

Nsfilemanager *filemanage = [Nsfilemanager Defaultmanager];

//1. File Additions

For example, to create a File1 folder under the Documents folder

① first to obtain the Documents folder path

NSString *documentspath = [Nssearchpathfordirectoriesindomains (nsdocumentdirectory, NSUserDomainMask,YES) Lastobject];

② then need to prepare the file path to be created

NSString *file1path = [Documentspath stringbyappendingpathcomponent:@ "Flie1"];

③ Creating a Folder

Parameter 1: File path

Parameter 2: If there are already other directories in the file, do you want to create

Parameter 3, 4: attribute, error message, nil

Used to determine if the file to be created exists

BOOL Ishave = [Filemanage Fileexistsatpath:file1path];

if (Ishave) {

NSLog (@ "file already exists");

}else{

NSLog (@ "file does not exist");

BOOL issuccess = [filemanage createdirectoryatpath:file1path withintermediatedirectories:yes Attributes:nil Error:nil ];

NSLog (@ "%@", issuccess @ "Create succeeded": @ "Create failed");

}

NSLog (@ "%@", File1path);

//2. Deletion of files

Determine if the file to be deleted exists

if ([Filemanage Fileexistsatpath:file1path]) {

NSLog (@ "file exists");

Delete

BOOL issuccess = [Filemanage removeitematpath:file1path error:nil];

NSLog (@ "%@", issuccess @ "Delete succeeded": @ "Delete failed");

}else{

NSLog (@ "file does not exist");

}

//3. Copy of File

Simple demonstration: Prepare a Love.txt file to be dragged into the project and copied to the File1 folder

① get the file path to copy

NSString *lovepath = [[NSBundle mainbundle]pathforresource:@ "Love" oftype:txt];

② preparing to copy the past file path

NSString *tolovepath = [File1path stringbyappendingpathcomponent:@ "Love.txt"];

Simple to determine if a copy of the past file path exists

if (![ Filemanage Fileexistsatpath:tolovepath]) {

BOOL issuccess = [filemanage copyitematpath:lovepath topath:tolovepath Error:nil];

NSLog (@ "%@", issuccess @ "copy succeeded": @ "copy failed");

}

//4. File Movement

Example: Move the File1 file to the Library folder

① getting the library file path

NSString *librarypath = [Nssearchpathfordirectoriesindomains (nslibrarydirectory, Nsuserdomainmask, YES) lastObject];

Get the path to add file1 to the LibraryPath file

NSString *tofilepath = [LibraryPath stringbyappendingpathcomponent:@ "File1"];

if (![ Filemanage Fileexistsatpath:tofilepath]) {

BOOL issuccess = [filemanage moveitematpath:file1path topath:tofilepath Error:nil];

NSLog (@ "%@", Issuccess @ "mobile success": @ "Move failed");

}

Calculate the size of a file by Nsfilemanage

Calculate the file size under the Tolovepath path

Nsdictionary *info = [Filemanage attributesofitematpath:tolovepath error:nil];

NSLog (@ "%LFM", info.filesize/1024.0/1024.0);

}

Management of iOS files (add, delete, copy, move)