ios - 从具有键值的字典数组中获取对象的索引

Question

我有一个带字典的数组。

现在我想获取具有特定键值的对象的索引号。

比如 key = "xyz"和 value = "abc"。

我需要在字典中具有以上匹配的对象的索引。

{
        Id = 20085;
        IsNew = 1;
        Title = Circular;
    },
        {
        Id = 20088;
        IsNew = 0;
        Title = Query;
    },
        {
        Id = 20099;
        IsNew = 1;
        Title = Blog;
    },
        {
        Id = 20104;
        IsNew = 1;
        Title = News;
    },
        {
        Id = 20172;
        IsNew = 1;
        Title = AssignTask;
    },
        {
        Id = 20183;
        IsNew = 1;
        Title = Gallery;
    },
        {
        Id = 20204;
        IsNew = 1;
        Title = Poll;
    },
        {
        Id = 20093;
        IsNew = 1;
        Title = Assignment;
    },
        {
        Id = 20209;
        IsNew = 1;
        Title = Activity;
    },
        {
        Id = 20130;
        IsNew = 1;
        Title = Behaviour;
    },
        {
        Id = 20180;
        IsNew = 1;
        Title = Result;
    }

现在我需要具有 key = "Title"和 value = "result"的对象索引

Answer 1

您可以使用 indexOf(_:)为此:

let index = array.indexOf{ $0["key"] == value }

在 Swift 3.0 中，它被重命名为 index(Where:):

let index = array.index{ $0["key"] == value }

您可以在实际操作中看到这一点 here .