Copy of IOS implementation files

//

Main.m

FileCopy

//

Created by Guoyule on 15/2/19.

Copyright (c) 2015 Guoyule. All rights reserved.

//

#import <Foundation/Foundation.h>

Implementing a copy of a file

#define Srcpath @ "/users/guoyule/desktop/emailreceipt_20150214r3887454299_new.pdf"

#define Dstpath @ "/users/guoyule/desktop/emailreceipt_20150214r3887454299_new1.pdf"

#define PERROR (Error) if (error) {NSLog (@ "%@", error); exit (-1);}

#define BUFF 100

Buffer size

int main (int argc, const char * argv[]) {

@autoreleasepool {

The so-called file copy is read from the original document to the destination file.

Create a file first

NSFILEMANAGER * FM =[nsfilemanager Defaultmanager];

Nserror * error = NIL;

Get the properties of a source file

Nsdictionary *attributes = [FM attributesofitematpath:srcpatherror:&error];

Perror (Error);

if (Error) {NSLog (@ "%@", error); exit (-1);};

Create a new file

BOOL RET = [FM createfileatpath:dstpath contents:nil Attributes:attributes];

if (!ret) {

Perror ("CreateFile");

Exit (-1);

}

Open File Handle

Nsfilehandle * SRCFH = [Nsfilehandlefilehandleforreadingatpath:srcpath];

Nsfilehandle * DSTFH = [Nsfilehandle Filehandleforwritingatpath:dstpath];

Don't read the source file into memory in a breath

First to get the source file size

size_t size = [[Attributes objectforkey:@ "Nsfilesize"] integervalue];

unsigned long long size = [Attributes fileSize];

This is a method that only works if the dictionary loaded file property is actually a category

/*

@interface Nsdictionary (nsfileattributes)

-(unsigned long long) fileSize;

-(NSDate *) filemodificationdate;

-(NSString *) FileType;

-(Nsuinteger) fileposixpermissions;

-(NSString *) fileowneraccountname;

-(NSString *) filegroupowneraccountname;

-(Nsinteger) Filesystemnumber;

-(Nsuinteger) Filesystemfilenumber;

-(BOOL) Fileextensionhidden;

-(OSType) Filehfscreatorcode;

-(OSType) Filehfstypecode;

-(BOOL) fileisimmutable;

-(BOOL) fileisappendonly;

-(NSDate *) filecreationdate;

-(NSNumber *) Fileowneraccountid;

-(NSNumber *) Filegroupowneraccountid;

@end

*/

while (size) {

NSData * data = nil;

if (size <= BUFF) {

data = [SRCFH readdatatoendoffile];

size = 0;

}else{

Read 100 bytes First

data = [SRCFH Readdataoflength:buff];

Size-= BUFF;

}

[DSTFH Writedata:data];

}

}

return 0;

}

Copy of IOS implementation files