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Old 09-12-2011, 12:46 PM   #1 (permalink)
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Default Content stretching, centered arrow

Hi.

I need to stretch an image which looks like as a SMS bubble, but rather than having its arrow on the right/left, it's centered.
I've been tweaking stretchableImageWithLeftCapWidth:topCapHeight: values and also contentStretch of the UIImageView, and corners, stretching works great, but the arrow remains on its original spot i.e. on the final image, the arrow is not centered.
This makes sense, since I'm explicitly defining the stretchable content to just avoid stretching that part so the arrow doesn't look deformed.
Is there any approach to achieve this? It seems like defining UIImage's caps or content stretch rect are not the way to go.
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Old 09-12-2011, 01:14 PM   #2 (permalink)
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Why don't you just make it two images - 1 that will be stretched, i.e. the "bubble", and the other image is just the arrow
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Old 09-12-2011, 01:19 PM   #3 (permalink)
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Quote:
Originally Posted by mariano_donati View Post
Hi.

I need to stretch an image which looks like as a SMS bubble, but rather than having its arrow on the right/left, it's centered.
I've been tweaking stretchableImageWithLeftCapWidth:topCapHeight: values and also contentStretch of the UIImageView, and corners, stretching works great, but the arrow remains on its original spot i.e. on the final image, the arrow is not centered.
This makes sense, since I'm explicitly defining the stretchable content to just avoid stretching that part so the arrow doesn't look deformed.
Is there any approach to achieve this? It seems like defining UIImage's caps or content stretch rect are not the way to go.
stretchableImageWithLeftCapWidth:topCapHeight: is limited in what it can do. It expects to have unique edges, and a middle that is generated programmatically by continuing the final pixels from the edges. I don't think there's any way to create a centered speech bubble arrow using just the stretchableImageWithLeftCapWidth:topCapHeight method. How about stacking 2 images, though? Create a stretchable image with no arrow, and then add another image on top of it that is just the arrow? Make the small arrow live in the same space as the stretchable UIImageView, with the struts and springs set up so it stays centered in it's view at a fixed size. You could probably make it a subview of the UIImageView that contains your stretchable image.

I bet you could get that to look perfect with a little fine-tuning.
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Old 09-12-2011, 01:30 PM   #4 (permalink)
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Duncan, smithdale87, thanks, that's exactly how I'm going to do it. Thank you very much.
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Old 09-12-2011, 01:36 PM   #5 (permalink)
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Quote:
Originally Posted by smithdale87 View Post
Why don't you just make it two images - 1 that will be stretched, i.e. the "bubble", and the other image is just the arrow
Great minds think alike, eh?
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See this thread on generating random, non-repeating text

Check out a very cool Macintosh Kaleidoscopes app called ScopeWorks that we released to the Mac App store.
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Old 09-12-2011, 01:59 PM   #6 (permalink)
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Well would ya look at that!
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Old 09-12-2011, 08:07 PM   #7 (permalink)
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Wanted to say that it worked, thanks to both of you!
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