在swift中使用有序形式在字典中迭代對象

Question

我有一本字典，我想按照有序形式對它進行迭代，因爲對象在字典中，但是在迭代之後它將以隨機順序迭代。請幫忙 提前致謝。

Answer 1

您不能對一個字典，而是可以將其鍵如下排序：

let myDict: [String:String] = ["car":"blue", "watch":"black", "bike": "red"] 

for key in myDict.keys.array.sorted(<) { 
    let value = myDict[key]! 
    println("\(key) = \(value)") 
} 


let dashboardItemsTuples : [(String , String)] = [("All Cards" , "cards"), ("Cards by Topic" , "cards_topic"), ("Lessons" , "lesson"), ("Audio" , "audio"), ("Video" ,"video") ,("Ebook" , "ebook") , ("Bookmarked Cards" , "bookmark_cards"), ("Upgrade","upgrade") , ("Downloads" ,"downloads")] 

for (key,value) in dashboardItemsTuples { 
    println("\(key)=\(value)") 
}