NSUnknownKeyException error

Discussion in 'iPhone/iPad Programming' started by Blakely028, Jul 5, 2010.

  1. macrumors regular

    Blakely028

    #1
    Hi there,

    I made an application that has a slider, textbox and a button and I got a NSUnknownKeyException error. The app loads and then closes almost instantaneously. Here is some of the error:

    Code:
    [Session started at 2010-07-05 23:04:47 +0100.]
    2010-07-05 23:04:49.078 Slider[1119:207] Unknown class SliderAppDelegate in Interface Builder file.
    2010-07-05 23:04:49.082 Slider[1119:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UICustomObject 0x5c077b0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key window.'
    *** Call stack at first throw:
    (
    Any help would be appreciated! :)
     
  2. Moderator

    robbieduncan

    Staff Member

    #2
    Did you create a class SliderAppDelegate then delete it or something. The error is quite clear: it's trying to create an instance of SliderAppDelegate but the class does not exist.
     
  3. macrumors regular

    Blakely028

    #3
    Hi, yeah I did delete it. Should I reinstate it?
     
  4. Moderator

    robbieduncan

    Staff Member

    #4
    Depends if you want/need it or not. If not then update the definitions in IB to remove all references to that class (even if you don't have any instances of it make sure the class is not in the Classes tab in the Library.
     

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