Why UIImage copyWithZone error before iOS4.1

Discussion in 'iOS Programming' started by mikezang, Jan 28, 2011.

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  1. mikezang, Jan 28, 2011

    mikezang macrumors 6502a

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    May 22, 2010
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    Tokyo, Japan
    #1
    I found if I run my app before iOS4.1, the app will shutdown with error [UIImage copyWithZone:]: unrecognized selector sent to instance.

    But it is no any problem on iOS 4.2, I don't why, can you explain to me and how can I avoid it?
     
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  2. ulbador, Jan 28, 2011

    ulbador macrumors 68000

    ulbador

    Joined:
    Feb 11, 2010
    #2
    I don't think UIImage implemented NSCopying (by default) before 4.2. So, long story short, you can't without creating your own image subclass (which is how people have done it before now)
     
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