ios - Objective-C: Expected a type error -

i trying follow tutorial using stylesheet nick kuh's book "iphone app development". stylesheet header file throwing:

"expected type"

errors think reflects circular problem. however, in case import foundation.h. (the implementation file, btw, not throw errors , seems fine.) here header file in entirety.

#import <foundation/foundation.h>  typedef enum : int {     idlabeltypename = 0,     idlabeltypebirthdaydate,     idlabeltypedaysuntilbirthday,     idlabeltypedaysuntilbirthdaysubtext,     idlabeltypelarge } idlabeltype;  @interface idstylesheet : nsobject +(void)initstyles;  +(void)stylelabel:(uilabel *)label withtype:(idlabeltype)labeltype;//throws red error  +(void)styletextview:(uitextview *)textview;//throws red error +(void)styleroundcorneredview:(uiview *)view;//throws red error   @end 

can see why these errors occurring?

uilabel, uitextview ... defined in uikit framework, therefore have to

#import <uikit/uikit.h> 

(which implicitly imports foundation). can use more modern "module" syntax:

@import uikit;