创建新文件并使用NSFileManager目标c读取它

Question

question: I want to write to a new file some data that I already have into a NSMutableData .

I was reading in several places about this but it's not clear at all. I was coding the next and It does not crash but I don´t know how to manipulate the "new file" since I don't know how to read it.

NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths objectAtIndex:0];
NSString* dataPath = [documentsDirectory stringByAppendingPathComponent:@"NewDataFile.txt"];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) {
            [[NSFileManager defaultManager] createFileAtPath:dataPath contents:dataBuffer attributes:nil];

Can someone complement this code or explain how to handle new files?

Answer 1

There are many ways to read a file. Use NSFileHandle to open the file and read from it, or use something like NSData's dataWithContentsOfFile: or dataWithContentsOfURL:.

Answer 2

The next link explain very well how to handle a file, it helped me a lot.

http://www.ios-developer.net/iphone-ipad-programmer/development/file-saving-and-loading/using-the-document-directory-to-store-files