Write operations for iOS implementation files

//

Main.m

nsfilehandledemo2-Write

//

Created by Guoyule on 15/2/19.

Copyright (c) 2015 Guoyule. All rights reserved.

//

This is a write file

#import <Foundation/Foundation.h>

#define PATH @ "/users/guoyule/desktop/guoyule.rtf"

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

@autoreleasepool {

Insert code here ...

NSLog (@ "Hello, world!");

Write a file

Nsfilehandle * fh = [Nsfilehandle Filehandleforwritingatpath:path];

Open a file in a read-only manner, generating a file handle

In the file handle, it's written in the file.

NSData * data = [@ "Guoyule" datausingencoding:nsutf8stringencoding];

String to Data

Writing data to a file

[FH Seektoendoffile];

Navigate to the end of the file and start writing at the end of the file

You can also navigate to any location

[FH seektofileoffset:100000];//Note that the TXT will be automatically wrapped.

[FH Writedata:data];

Write one more time.

[FH Writedata:data];

Emptying source file data

[FH truncatefileatoffset:0];

Truncate the source data to the remaining number of bytes established

int i = 0;

while (i++ < 5) {

[FH Writedata:data];

}

Each time the data is written, the last write will continue to be written from scratch every time the file is opened.

}

NSLog (@ "Guoyule");

return 0;

}

Write operations for iOS implementation files