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What is Nsfilehandle?

What is Nsfilehandle?

An object-oriented wrapper for a file descriptor.

How do I read a file in Objective C?

NSString *filepath = [[NSBundle mainBundle] pathForResource:@”myList” ofType:@”txt”]; NSData* data = [NSData dataWithContentsOfFile:filepath]; NSString* string = [[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSUTF8StringEncoding]; NSString* delimiter = @”\n”; listArray = [string …

What is document directory in iOS?

Every iOS app gets a slice of storage just for itself, meaning that you can read and write your app’s files there without worrying about colliding with other apps. This is called the user’s documents directory, and it’s exposed both in code (as you’ll see in a moment) and also through iTunes file sharing.

What is the difference between NSURLSession and NSURLConnection?

NSURLSession also provides nicer interfaces for requesting data using blocks, in that it allows you to combine them with delegate methods for doing custom authentication handling, redirect handling, etc., whereas with NSURLConnection, if you suddenly realized you needed to do those things, you had to refactor your code …

What is NSURLConnection?

An NSURLConnection object lets you load the contents of a URL by providing a URL request object. The interface for NSURLConnection is sparse, providing only the controls to start and cancel asynchronous loads of a URL request. You perform most of your configuration on the URL request object itself.

How do I write to a file in Objective C?

“write data to file objective c” Code Answer

  1. //writes an textfile to an place in the document directory.
  2. -(void)write:(NSString *)dir file:(NSString *)ff{
  3. //get the documents directory:
  4. NSArray *paths = NSSearchPathForDirectoriesInDomains.
  5. (NSDocumentDirectory, NSUserDomainMask, YES);

Why does NSFileHandle create a file handle object?

Most creation methods for NSFileHandle cause the file handle object to take ownership of the associated file descriptor. This means that the file handle object both creates the file descriptor and is responsible for closing it later, usually when the file handle object itself is deallocated.

What does nsfilemanager do in the file manager?

A convenient interface to the contents of the file system, and the primary means of interacting with it. A file manager object lets you examine the contents of the file system and make changes to it. The NSFileManager class provides convenient access to a shared file manager object that is suitable for most types of file-related manipulations.

Can a shared nsfilemanager be called from multiple threads?

The methods of the shared NSFileManager object can be called from multiple threads safely.

Can a NSData be written out to a new file?

Having stored the contents of a file in an NSData object, that data may subsequently be written out to a new file using the createFileAtPath method: IOSBOX In the above example we have essentially copied the contents from an existing file to a new file.