摘要： SJABHelper.h#import enum { ABHelperCanNotConncetToAddressBook, /**@implementation SJABHelper+ (SJABHelper*)shareControl{ static SJABHelper *instance; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ instance = [[SJABHelper alloc] init]; }); return insta... 阅读全文