iphone - Cannot find protocol declaration for 'NSPasteboardWriting' -

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i getting error

cannot find protocol declaration 'nspasteboardwriting'

i have created class

#import <uikit/uikit.h> #import <foundation/foundation.h>  @interface errorlog : nsobject<nscoding, nspasteboardwriting, nspasteboardreading> {  }  @end

can 1 tell me whether missing header file or whats reason that?

nspasteboardwriting available in mac os x v10.6 , later. check project setting(base sdk).


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