NSXMLParserDelegate compile problem - iPhone SDK 30. vs 4.0

Question

My header file is defined like this:

#import 

@interface Warning: NSObject  { 

In my .m file I do:

Answer 1

I was able to fix this with:

#if __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_4_0
@protocol NSXMLParserDelegate
@end
#endif
@interface Warning: NSObject 

Just be sure to implement the appropriate methods in your implementation.