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NSPredicateによる配列のフィルタリング: likeとcontains

Objective-C

Posted at 2012-02-16

NSPredicateの条件文字列でlikeは文字列完全一致，containsは部分一致をチェックする．
containsのときはsingle quoteで括り，likeのときは括ってはいけない．ちょっとはまった．

NSPredicate *predLike = [NSPredicate predicateWithFormat:@"name like[c] %@", name];
NSPredicate *predContains = [NSPredicate predicateWithFormat:@"name contains[c] '%@'", name];

[c]はcase-insensitiveなマッチングを行ないたいときに付けるもの．

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