如何快速獲取數組類型字典的鍵

Question

如何快速獲取數組類型字典的鍵。我想輸出作爲 LOCATION1，LOCATION2，LOCATION3

//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

給你的情況，你將通過data必須循環和（類型字典的數據陣列的鍵）在每次迭代中獲取數組中第一個對象的鍵。這是因爲它是Dictionaries的Array，而不是Dictionary。但是，我建議將data變量構造爲Dictionary，除非您的解決方案還有其他更多內容，否則沒有理由不這樣做。

我建議做以下幾點：

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

然後，它是微不足道的，讓您的鑰匙：

data.keys 

注：Dictionary不會進行排序。