Re: Core data commit changes made programmatically
Re: Core data commit changes made programmatically
- Subject: Re: Core data commit changes made programmatically
- From: Kyle Sluder <email@hidden>
- Date: Wed, 24 Apr 2013 20:08:13 +0200
Mutating an attributed string doesn't count as "key-value coding", even if the string itself is exposed as a KVC-compliant property.
Since the only KVC-compliant change for the textStorage property would be to change it to a completely new object instance, and that would be very wasteful, you will need to add another property that you mutate in a KVC-compliant manner to trick Core Data into noticing your attributed string has changed.
--Kyle Sluder
On Apr 23, 2013, at 11:41 PM, Peng Gu <email@hidden> wrote:
> I have a textview that is binding to Core data, I want to be able to
> highlight the selected text in the textview.
>
> *[self.textStorage addAttribute:NSBackgroundColorAttributeName value:[
> NSColor yellowColor] range:self.selectedRange];*
>
> The code above works, but core data won't save the attributes changes
> unless I type some words in the Textview. Calling moc to commit editting
> doesn't save the changes too.
>
> *[aManagedObjectContext commitEditing];*
>
> *[aManagedObjectContext save:&error];*
>
> I also tried to set the value of the object in Core data after adding the
> attributes, but *[aManagedObject setValue:text forKey:@"text"] *will make
> the textview lose focus.
>
>
> Is there any way to force the core data to save the changes immediately? Or
> any better way to highlight selected text in NSTextview, like addFontTrait:
> used by Bold, Italic Menu Items?
>
>
> Thanks,
>
> - Peng
>
> *
> *
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