Couple questions I've been stuck in..

Discussion in 'iOS Development' started by 280923299, Jun 29, 2009.

  1. 280923299

    280923299 New Member

    Jun 29, 2009
    Likes Received:
    Hi everyone.

    It's really a good place, while other iphone developer forums are rejecting toolchain developers asking non-sdk related staff. I tried to post these, but crazy guys delete my threads every time. Then finally this forum, i got a place to ask..

    1. How to run apps in background without backgrounder, just like cycorder and dtunes. Backgrounder cannot run in 3.0 properly, but these two apps run quite well. I really wanna know how they did that?

    2. How to detect the type of a function's argument? In the headers I dumped in iphone, a lot of apis take arguments of type "id". In objective-c runtime reference, there were some functions related(I think it is copyMethodArgumentType

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    , but I don't know how to use them. They always return "@".

    3. How to create low resolution image from a high resolution image? I need to show a preview image.

    I really hope if someone can give me some answers or suggestions. Thank you.

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