How to save/load text files in Objective-C for the iPhone, using UITextView?

Question

How do you save text files permanently to an iPhone? And then be able to open them again in another UITextView?

Thanks in advance.

Answer 1

To write a NSString to a file:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"file.txt"];

NSString *str = @"hello world";

[str writeToFile:filePath atomically:TRUE encoding:NSUTF8StringEncoding error:NULL];

To load NSString from a file:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"file.txt"];
NSString *str = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL];

And use text property of UITextView to set and get NSString.

NSString *str = myTextView.text;
myAnotherTextView.text = str;