+ (HKSQLite *) sharedSQLite { static HKSQLite *_SQLite; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ _SQLite = [[HKSQLite alloc] initWithPath:self.path]; [_SQLite setup]; }); return _SQLite; } Register as a new user and use Qiita more conveniently You get articles that match your needsYou can efficiently read back useful informationYou can use dark themeWhat you can do with signi