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Questions tagged [nsundomanager]

`NSUndoManager` is a general-purpose recorder of operations for undo and redo.

222 questions
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5 answers

Xcode LLDB Print Statements Fail - NSUndoManager

I have a breakpoint set and want to print my UITextField's superview. I type po myTextField.superview but I receive the following error: error: instance method 'undoManager' has incompatible result types in different translation units ('id' vs.…
rizzes
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Cocoa: looking for a general strategy for programmatic manipulation of NSTextView storage without messing up undo

I am writing a special-purpose text editor in cocoa that does things like automatic text substitution, inline text completions (ala Xcode), etc. I need to be able to programmatically manipulate the NSTextView’s NSTextStorage in response to 1) user…
pjv
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How to implement undo/redo in UIWebView

I am developing an app which has rich text editor feature. On top of ZSSRichTextEditor I have written my editor code. Here my editor is UIWebView which will be injected by javascript code to support/edit the rich text content. ZSSRichTextEditor has…
thavasidurai
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Is it OK to use multiple NSUndoManagers with one Core-Data managedObjectContext?

//Edit: Really, nobody has any suggestions or thoughts on this? Have I asked the question wrongly somehow?// My iPhone app has a single managedObjectContext with a moderately complicated data model. I'm now adding undo functionality, and am not…
mackworth
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8 answers

How do I register UndoManager in Swift?

How do I use UndoManager (previously NSUndoManager) in Swift? Here's an Objective-C example I've tried to replicate: [[undoManager prepareWithInvocationTarget:self] myArgumentlessMethod]; Swift, however, seems to not have NSInvocation, which…
Kevin Griffin
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How can I replace text in UITextView with NSUndoManager support?

I want to be able to replace some text in an UITextView programatically, so I wrote this method as an UITextView category: - (void) replaceCharactersInRange:(NSRange)range withString:(NSString *)newText{ self.scrollEnabled = NO; …
nacho4d
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Something very strange UITextView in iOS 7 ... not in iOS 6?

I'm creating a UITextView: greetingTextView = [[UITextView alloc] initWithFrame:greetingRect]; Using it fine, but when the ViewController it is attached to deallocs I'm getting memory leaks ONLY in iOS 7 ? I'm even Nulling the greetingTextView out…
Aardvark
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1 answer

iOS - UITextView + NSUndoManager

I'm trying to integrate the undo/redo features in a UITextView (I'm building a LateX editor) with no luck and to be honest I'm really confused about this argument. I don't understand the steps involved in those two operations, I mean I need two…
oiledCode
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1 answer

undo all changes made in the child view controller

There are two entities: Author and Book. Author has an attribute authorName and a to-many relationships books. Book has several attributes and a relationship author. There is a view controller (VCAuthor) to edit an Author object. The child view…
lu yuan
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3 answers

NSUndoManager, Core Data and selective undo/redo

I'm working on a core data application that has a rather large hierarchy of managed objects similar to a tree. When a base object is created, it creates a few child objects which in turn create their own child objects and so on. Each of these child…
Arlen Anderson
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3 answers

Using NSUndoManager and .prepare(withInvocationTarget:) in Swift 3

I am migrating an Xcode 7 / Swift 2.2 mac OS X project to Xcode 8 / Swift 3, and I have run into a problem using undoManager in my view controller class, MyViewController, which has a function undo. In Xcode 7 / Swift 2.2, this worked…
jbaraga
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How can I make NSUndoManager's undo/redo action names work properly?

I'm learning Cocoa, and I've gotten undo to work without much trouble. But the setActionName: method is puzzling me. Here's a simple example: a toy app whose windows contain a single text label and two buttons. Press the On button and the label…
Gabriel Roth
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Using NSUndoManager, how to register undos using Swift closures

I am trying to grok how to use NSLayoutManager using Swift closures. I can successfully register an undo as follows: doThing(); undoManager?.registerUndoWithTarget(self, handler: { _ in undoThing(); } undoManager?.setActionName("do thing") Of…
wcochran
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NSUndoManager and enabling/disabling an undo button

In my iOS application's interface I have explicit undo & redo button (shake-to-undo is a pretty heavyweight action and in this context, undos are performed pretty frequently). Normally, I would use KVO to observe NSUndoManager's canUndo and canRedo…
Colin Barrett
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3 answers

NSUndoManager undo Not Working With Core Data

I am trying to create an iPhone application where the user can add entries. When he presses a new entry, a box will popup asking him for some information. Then he can either press "Cancel" or "Save" to discard the data or save it to disk. For…
kkrizka
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