字典在快速迭代时返回连续/混洗的值 [英] Dictionary returns consecutive/shuffled values when iterating in swift

问题描述

我有以下字典

var data : [String: String] = ["DEV" : "DEV", "QUA" : "QUA" , "SIT" : "SIT", "UAT" : "UAT", "PROD" : "PROD"]

我使用 for 循环迭代它并获得以下值

I Iterate it using for loop and get the following values

SIT
PROD
DEV
UAT
QUA

即连续值

我有以下代码来迭代它

for (key, value ) in data.enumerate()
{
    print(value)
}

我想以相同的声明格式获取这些值.

I want to get these values in same format of declaration.

推荐答案

Swift Dictionary 类型是无序类型.在每个 for in 循环中，您可以收到不同的有序结果(理论上).如果你想保持顺序，你应该选择其他数据结构，Array<(String, String)> 例如:

Swift Dictionary type is unordered type. On every for in loop you can receive different ordered result (in theory). You should choose other data structure if you wish to keep order, Array<(String, String)> for example:

var data: Array<(String, String)> = [("DEV", "DEV"), ("QUA", "QUA"), ("SIT", "SIT"), ("UAT", "UAT"), ("PROD", "PROD")]

for element in data {
    print(element.1)
}
//DEV
//QUA
//SIT
//UAT
//PROD

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