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person.h
#import <Foundation/Foundation.h> @interface Person : NSObject + (id)sharedInstance; @end
person.m
+ (id)sharedInstance { static Person *theSharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ theSharedInstance = [[self alloc] init]; }); return theSharedInstance; }
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person.h
person.m
The text was updated successfully, but these errors were encountered: