如何快速獲取類型字典數組的鍵

Question

如何快速獲取字典類型數組的鍵。 我希望輸出為location1，location2，location3（類型為dictionary的數據數組的鍵）

//我的代碼如下

 class ViewController: UIViewController 
        {
        var data = [NSDictionary]()

            var LocationPickerData:[String] = ["Mozzarella","Gorgonzola","Provolone","Brie","Maytag Blue","Sharp Cheddar","Monterrey Jack","Stilton","Gouda","Goat Cheese", "Asiago"]

            var LocationPickerData2 = ["Mozzarella","Gorgonzola","Provolone","Brie","Maytag Blue","Sharp Cheddar","Monterrey Jack","Stilton","Gouda","Goat Cheese", "Asiago"]

            var LocationPickerData3 = ["Mozzarella","Gorgonzola","Provolone","Brie","Maytag Blue","Sharp Cheddar","Monterrey Jack","Stilton","Gouda","Goat Cheese", "Asiago"]

     override func viewDidLoad() {
                super.viewDidLoad()
             data = [["lacation1":LocationPickerData],["location2":LocationPickerData2],["location2":LocationPickerData3]]

print(data[keys])

        }
        }

Answer 1

在您的情況下，您將必須遍歷data並且在每次迭代中都將獲取數組中第一個對象的鍵。 那是因為它是Dictionaries Array ，而不是Dictionary 。 但是，我建議將您的data變量構造為Dictionary ，除非您的解決方案有更多內容，否則沒有理由不這樣做。

我建議執行以下操作：

data = ["location1":LocationPickerData, "location2":LocationPickerData2, "location3":LocationPickerData3]

然后，獲取密鑰很簡單：

data.keys

注意： Dictionary不會排序。