ios - 如何根据其中包含的某些值过滤数组

Question

我有数组中的对象集合，如下所示。

arr_recipes = [{
  recipe.name = r1,
  recipe_tags = [t1, t2, t3]
},
{
 recipe.name = r1,
 recipe_tags = [t1, t2]
},
{
 recipe.name = r1,
 recipe_tags = [t4, t5, t6]
}]

现在，我想通过标签名称搜索 arr_recipes 的内容，即如果我输入 t1，它应该返回以下结果:

 arr_searchresult= [{
  recipe.name = r1,
  recipe_tags = [t1, t2, t3]
},
{
 recipe.name = r1,
 recipe_tags = [t1, t2, t3]
}
}]

如果我在 uisearhcbar 中输入 t3，我应该得到如下结果:

arr_searchresult = [{
  recipe.name = r1,
  recipe_tags = [t1, t2, t3]
}]

有人可以建议我对上面的搜索结果 obtian 进行谓词吗？

Answer 1

使用这个:

NSArray *arr_recipes = @[@{@"recipe.name" : @"r1",
                         @"recipe_tags" : @[@"t1", @"t2", @"t3"]},
                         @{@"recipe.name" : @"r1",
                         @"recipe_tags" : @[@"t1", @"t2"] } ];

NSString *searchText = @"t3"; // set your search field value.

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"recipe_tags contains[cd] %@", searchText];

NSArray *filteredArray = [arr_recipes filteredArrayUsingPredicate:predicate];

NSLog(@"%@", filteredArray);