ios - Swift - 如何查找数组中数组中项目的索引

Question

这个问题已经有答案了:

How to get the index of an item in a 2D array? (4 个回答)

已关闭 5 年前。

我只有 10 岁，正在制作一款 war (纸牌游戏)应用程序。在 war 应用程序中，我必须将数组放入数组中。我如何在这种数组中找到项目的索引？ 这是一个我会收到错误的示例:

var card_array = [["2_of_clubs", "2_of_diamonds", "2_of_hearts", "2_of_spades"],
                  ["3_of_clubs", "3_of_diamonds", "3_of_hearts", "3_of_spades"],
                  ["4_of_clubs", "4_of_diamonds", "4_of_hearts", "4_of_spades"],
                  ["5_of_clubs", "5_of_diamonds", "5_of_hearts", "5_of_spades"],
                  ["6_of_clubs", "6_of_diamonds", "6_of_hearts", "6_of_spades"],
                  ["7_of_clubs", "7_of_diamonds", "7_of_hearts", "7_of_spades"],
                  ["8_of_clubs", "8_of_diamonds", "8_of_hearts", "8_of_spades"],
                  ["9_of_clubs", "9_of_diamonds", "9_of_hearts", "9_of_spades"],
                  ["10_of_clubs", "10_of_diamonds", "10_of_hearts", "10_of_spades"],
                  ["jack_of_clubs2", "jack_of_diamonds2", "jack_of_hearts2", "jack_of_spades2"],
                  ["queen_of_clubs2", "queen_of_diamonds2", "queen_of_hearts2", "queen_of_spades2"],
                  ["king_of_clubs2", "king_of_diamonds2", "king_of_hearts2", "king_of_spades2"],
                  ["ace_of_clubs", "ace_of_diamonds", "ace_of_hearts", "ace_of_spades"]]
var locationBottom = card_array.index(of: ["4_of_spades"])
var locationTop = card_array.index(of: ["king_of_diamonds2"])
print(locationTop)
print(locationBottom)                                            

Answer 1

看起来你想要的是:

var locationBottom = card_array[0].index(of: "4_of_spades")
var locationTop = card_array[0].index(of: "king_of_diamonds2")

相反，您正在寻找一个数组实例，该数组在包含所有 52 张卡片的数组中仅包含一张卡片。