I am trying to implement an iphone application which can read some fixed amount of bytes from a file and store in another file. this process will go on up to the end of the file. I am very new to iphone application so please help me on that . Is there any parent classes out there for this specific type of implementation?
I had a very large file which couldn t be read with NSData methods, so I used the following (per TechZen s suggestion for fine grain control).
NSFileHandle *fileHandle = [NSFileHandle fileHandleForReadingAtPath:filePath];
[fileHandle seekToFileOffset:offset];
NSData *data = [fileHandle readDataOfLength:length];
If you just want to copy the file, use NSFileManager s copy functions.
If you just want specific bytes in a file, you can load the file using NSData s file methods then you can get specific blocks of bytes and write them to file.
If you want more fine grain control, use NSFileHandler.
Edit01:
This page has examples for close to what you want. I don t have anything on hand.
我想在无休止的程序中利用它来警告用户。
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