That looks like a good thing to try, thanks. I'm quite fortunate in that the images I need to add are perfectly the size of an ideographic space (they are fragments of Chinese characters which don't have real Unicode points) so CT does a fine job with them. Sounds like I need one trailing character with the CTRunDelegate set to return 0 or 1px wide nothing and that will force what I need.
I'll try that today. Thanks. On 10 Apr, 2013, at 6:22, Wim Lewis <[email protected]> wrote: > > On 9 Apr 2013, at 7:04 PM, Roland King wrote: >> I have an attributed string I'm laying out with a CTFrame. The string can >> have a trailing space in it, possibly more than one, they are actually >> \u3000, IDEOGRAPHIC SPACE. I need them to be treated like a real character >> and laid out, even if that breaks onto a new line. Those 'spaces' are >> placeholders for small images which can't be embedded in the string (iOS >> doesn't allow images in attributed strings like it does on OSX) so I need >> them laid out so I can find where they went and overlay the graphics. A >> little messy, works better than I expected, apart from this. > > We do attachments using U+FFFC OBJECT REPLACEMENT CHARACTER (which Apple also > names NSAttachmentCharacter on the desktop) and setting a custom > CTRunDelegate to specify the metrics of the attachment image (width, ascent, > descent). Then we run through the laid-out text to find the attachment runs > and draw their images and so on. This is rather clumsy (why doesn't > CTRunDelegate have a drawing callback?) but it gets the job done. > > I think you can actually use any character rather than U+FFFC there, and it > probably affects the line breaking algorithm accordingly. > > > > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/rols%40rols.org > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
