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Answer 1

A:

Set your scrollview pagingEnabled property to true, then set the contentSize to a size thats the sum of widths of all the imageviews. You then add each UIImageView to the UIScrollView making sure to position them next to each other.

Here is a tutorial talking about this: http://kwigbo.com/post/758575763/uiscrollview-image-gallery-tutorial

I'm not sure about enabling zoom but that should get you paging through image views.

Ben 2010-10-13 13:22:54

This is very close to what i need to to, but the app crashes on the device. I think it's because of the size of the Images. 12 Pages (12 Pictures) each around 650 kb size. The Images need to be large, the user should be able to zoom to an article on a page to read it. Any suggestions ? Maybe using initWithData instead of imageWithName?

MadMaxAPP 2010-10-13 14:04:54

What you can do is swap the images in and out of memory, so keep a minimum of 3 imageviews in the scrollview then load and unload images when swiped. Or you can compress the images more. That doesn't seem like a lot of memory though it should be fine.

Ben 2010-10-13 14:07:01

Thats what the Debug Console says:Program received signal: “0”.Data Formatters temporarily unavailable, will re-try after a 'continue'. (Unknown error loading shared library "/Developer/usr/lib/libXcodeDebuggerSupport.dylib")

MadMaxAPP 2010-10-13 14:07:20

That sounds like something other than a memory issue.

Ben 2010-10-13 14:07:56

You mean releasing the not needed imageviews and adding them later when needed again?

MadMaxAPP 2010-10-13 14:08:25

Well releasing the image part of them at least, but I don't think memory is your problem anymore.

Ben 2010-10-13 14:09:14

Actually I take that back it does seem like memory. Try using the 3 imageviews and assigning images to them as needed.

Ben 2010-10-13 14:10:44

wow... made the changes and now the app crashes after 4 wipes... 3 Memory Warnings and then is crashes. Need to investigate that further...

MadMaxAPP 2010-10-13 17:14:31

If you are using IUImage imagenamed: you may want to switch to alloc initWithContentsOfFile so you can manually release the images and not rely on an autorelease.

Ben 2010-10-13 17:18:01

ok ... i found out the Images used where in 150dpi. After changing it to 72dpi i only recieve sometimes a memory warning. I will change that to initwithContentsOfFile.

MadMaxAPP 2010-10-14 13:13:26

Answer 2

A:

I can't get the zooming to work ... any Idea ? Ben ? Still there :-) ?? If i activate the zooming, both Images where zoomed at the same time and overlap. After the zooming, the scrolling does not work anymore.

I included the

viewForZoomingInScrollView

but i can't figure out how to wire things up.

MadMaxAPP 2010-10-14 22:34:40

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UIImage in IUUmageView in UIScrollView?

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