On Mar 11, 2015, at 3:36 AM, Charles Jenkins <cejw...@gmail.com> wrote:
> I’m having a bit of difficulty learning how to use the pasteboard. I have a
> text view which holds the text in a rich attributed string. I determined that
> the built-in methods for cutting and pasting were screwing up my data because
> not all attributes survive the cut-and-paste process’s translation to and
> from RTF for the pasteboard.
>
> For that reason I created my on custom data class as described in the
> Pasteboard Programming Guide. The class is called “Clipping,” and of course I
> defined an Exported UTI to go with it.
>
> The problem is in my implementation of NSPasteboardWriting. Here are the
> writable types:
>
> -(NSArray*)writableTypesForPasteboard:(NSPasteboard*)pasteboard
> {
> NSMutableArray* arr = [[NSMutableArray alloc] initWithObjects:CLIPPING_UTI,
> nil];
> [arr addObjectsFromArray:[self.attrStr
> writableTypesForPasteboard:pasteboard]];
> return arr;
> }
>
> The result is three types: CLIPPING_UTI, RTF, and plain string. The first
> type allows my data to be copied and pasted intact within the text views of
> my document windows; followed by the normal types of an attributed string for
> compatibility with other apps.
>
> What I don’t know is the right way to put all the promised types on the
> pasteboard in order. Here’s what I tried that does not work:
>
> -(BOOL)copyToPasteboard:(NSPasteboard*)pasteboard
> {
> [pasteboard clearContents];
> NSMutableArray* objectsToCopy = [[NSMutableArray alloc] init];
> for ( NSString* type in [self writableTypesForPasteboard:pasteboard] ) {
> id data = [self pasteboardPropertyListForType:type];
> [objectsToCopy addObject:data];
> }
> return [pasteboard writeObjects:objectsToCopy];
> }
You have one item to add to the pasteboard. That item supports multiple types,
but that's not relevant here. You want to do:
-(BOOL)copyToPasteboard:(NSPasteboard*)pasteboard
{
[pasteboard clearContents];
return [pasteboard writeObjects:@[ self ]];
}
That is, just write your object itself, alone, to the pasteboard. Once you do
that, with the -writableTypesForPasteboard: method above and the method below,
you're good.
> -(id)pasteboardPropertyListForType:(NSString*)type
> {
> if ( [type isEqualToString:CLIPPING_UTI] ) {
> return self.xml;
> } else {
> return [self.attrStr pasteboardPropertyListForType:type];
> }
> }
Regards,
Ken
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