ios - Can't Resolve Type in Protocol -

#import "mpocontactauthorizationmanager.h"  @protocol mpocontactauthorizationmanagerdelegate <nsobject>  - (void)authorizationmanger:(mpocontactauthorizationmanager *)manager       didupdatecontactstate:(contactsstate)contactstate;  @end 

mpocontactauthorizationmanager , contactstate not resolving types though declared in mpocontactauthorizationmanager:

#import "mpocontactauthorizationmanagerdelegate.h"  typedef enum _contactsstate {     kcontactsstateunknown,     kcontactsstateallowed,     kcontactsstatedisallowed } contactsstate;  @interface mpocontactauthorizationmanager : nsobject <uialertviewdelegate> {     contactsstate _contactsauthorizationstate;; }  @property (strong, nonatomic) nsobject<mpocontactauthorizationmanagerdelegate> *delegate; @property (nonatomic) contactsstate contactsauthorizationstate; 

any ideas why these not resolving? both getting error "expected type"

thanks mike

you have circular dependency. update mpocontactauthorizationmanagerdelegate.h header getting rid of #import line , adding following:

@class mpocontactauthorizationmanager; 

just before @protocol line.

just put both in 1 .h file (you still need forward declaration mpocontactauthorizationmanager):

typedef enum _contactsstate {     kcontactsstateunknown,     kcontactsstateallowed,     kcontactsstatedisallowed } contactsstate;  @class mpocontactauthorizationmanager;  @protocol mpocontactauthorizationmanagerdelegate <nsobject>  - (void)authorizationmanger:(mpocontactauthorizationmanager *)manager       didupdatecontactstate:(contactsstate)contactstate;  @end  @interface mpocontactauthorizationmanager : nsobject <uialertviewdelegate> {     contactsstate _contactsauthorizationstate;; }  @property (strong, nonatomic) nsobject<mpocontactauthorizationmanagerdelegate> *delegate; @property (nonatomic) contactsstate contactsauthorizationstate;