swift - 替换 [字符串 : string] at specific index Swift

Question

替换特定索引处的字符串

var stringArray:[String] = ["value1", "value2", "value3", "value4"]

我们使用

stringArray[2] = "new string"

var myNewDictArray = [Dictionary< String, String> ] ()

就我而言，我有

key/value pair
    ▿ (2 elements)
      - .0: "answer"
      - .1: "0"
  ▿ 1 key/value pair
    ▿ (2 elements)
      - .0: "answer"
      - .1: "0"
  ▿ 1 key/value pair
    ▿ (2 elements)
      - .0: "answer"
      - .1: "0"
  ▿ 1 key/value pair
    ▿ (2 elements)
      - .0: "answer"
      - .1: "0"
  ▿ 1 key/value pair
    ▿ (2 elements)
      - .0: "answer"
      - .1: "0"
  ▿ 1 key/value pair
    ▿ (2 elements)
      - .0: "answer"
      - .1: "0"

在我的数组中

当我尝试替换特定索引处的字典时，比如 5，它显示错误:

Swift:: Error: contextual type '[String : String]' cannot be used with array lit eral myNewDictArray[index] = ["answer", "option3"]

我使用的代码是

for (index, element) in myNewDictArray.enumerated() {

    if(index==5) {

        myNewDictArray[index] = ["answer", "option3"]

    } 

}

我也试过

for (index, element) in myNewDictArray.enumerated() {

    if(index==5) {

        myNewDictArray[index].value(forKey:"answer") = "option3"

    } 

}

那么错误就是

Swift:: Error: value of type '[String : String]' has no member 'value' myNewDictArray[index].value(forKey:"answer") = "option3"

Answer 1

你可能在用你的字典数组寻找下标。

var myNewDictArray = [[String:String]]()// OR [Dictionary< String, String>]()
//If you want to update specific key value pair
myNewDictArray[index]["answer"] = "option3"
//If you want to replace whole dictionary with new one
myNewDictArray[index] = ["answer" : "option3"]