CocoaDev

Is there any method to convert NSData from RTF data to NSString? If there is some text (with or without images) displayed in textView, then I can read it that way: [NSString stringWithString:[textView string]], but I need to get NSString from a variable containing NSData.

You can create a NSAttributedString with the

 - (id)initWithRTF:(NSData *)rtfData documentAttributes:(NSDictionary **)docAttributes

method, and take the NSString from there.

// Assumes ‘rtfData’ is a valid NSData object containing valid RTF data.

NSAttributedString * attrString = [[NSAttributedString alloc] initWithRTF:rtfData documentAttributes:nil]; NSString * finalString = [attrString string];

I needed NSString for performing search with such methods as rangeOfString:. Is it safe to search the resulting NSString; documentation for NSAttributedString reads: “This method doesn�t strip out attachment characters; use NSText�s string method to extract just the linguistically significant characters.”

There are methods for getting NSData from RTFD stream (such as RTFDFromRange:), but is there any way to create an RTFD data from an empty string?

Simply create an NSAttributedString with an empty string (initWithString:@””) and then call that method using NSRange(0, 0)

Or just type this into your code:

{\rtf1\mac\ansicpg10000\cocoartf102 {\fonttbl} {\colortbl;\red255\green255\blue255;} \margl1440\margr1440\vieww9000\viewh9000\viewkind0 }

I’m having a serious problem getting my program to read RTF files. I’m following the tutorial located at

http://developer.apple.com/documentation/Cocoa/Conceptual/Documents/Tasks/ImplementingDocApp.html

My document subclass looks like this:

• (void)windowControllerDidLoadNib:(NSWindowController *) aController { [super windowControllerDidLoadNib:aController]; // Add any code here that needs to be executed once the windowController has loaded the document’s window. [textView setAllowsUndo:YES]; if (fileContents != nil) { [textView setString:fileContents]; [fileContents release]; fileContents = nil; } }

//——————————————————————

• (NSData *)dataRepresentationOfType:(NSString *)aType { NSAssert([aType isEqualToString:@”rtf”], @”Unknown type”); return [textView RTFFromRange:NSMakeRange(0, textView textStorage] length])]; }

// ——————————————————————–

• (BOOL)loadDataRepresentation:([[NSData *)data ofType:(NSString *)aType { NSLog(@”Test”, nil); NSAssert([aType isEqualToString:@”rtf”], @”Unknown type”); fileContents = [data copyWithZone:[self zone]];

  return YES;

}

Saving works fine; Any file I make will open fine with TextEdit. However, when I try to open a file using my program, it just opens a new window with the title of the document, but the textView in the window is empty. The Run window says:

2004-05-01 19:56:54.458 Document[2582] ** -[NSPageData _isCString]: selector not recognized 2004-05-01 19:56:54.466 Document[2582] ** -[NSPageData _isCString]: selector not recognized

– MattBall

You’re trying to send nsdata to a method that takes nsstring- try using:

[textView replaceCharactersInRange:NSMakeRange(0,0) withRTFD:fileContents];

instead, or something similar to that.