How can I replace text in UITextView with NSUndoManager support?

Question

I want to be able to replace some text in an UITextView programatically, so I wrote this method as an UITextView category:

- (void) replaceCharactersInRange:(NSR         


        

Answer 1

Shouldn't it be

[[self.undoManager prepareWithInvocationTarget:self] replaceCharactersInRange:NSMakeRange(range.location, newText.length) 
                                                                   withString:[self.text substringWithRange:range]];

And you probably can remove the mutable string and just do,

self.text = [self.text stringByReplacingCharactersInRange:range withString:newText];