Question

我有一个NSDictionary的NSArray

let Array = (
{ name = "Auni";
  age = "24";
  transactionTime = "01-02-2011 12:32:39" },
{ name = "Atiqah";
  age = "23";
  transactionTime = "02-02-2013 10:32:41" },
{ name = "Aida";
  age = "22";
  transactionTime = "04-02-2020 18:32:21"})

如何按最新的transactionTime 对该数组进行排序？使用Swift4。

谢谢。

编辑：让后端人员为您完成这项工作更容易。

Answer 1

直到将其转换为Date对象后，您才能进行操作。您可以使用枚举块，并在运行时将字符串转换为date对象，如下例所示：

let df = DateFormatter()
df.dateFormat = "dd-MM-yyyy HH:mm:ss"
array.sort { (dict1, dict2) -> Bool in

    /// Considering "transactionTime" key always exists.
    let transactionTime1 = dict1["transactionTime"]!
    let transactionTime2 = dict2["transactionTime"]!

    let date1 = df.date(from: transactionTime1)!
    let date2 = df.date(from: transactionTime2)!

    /// Sort in descending order
    return date1 > date2
}

print(array)

输出

[[“ transactionTime”：“ 04-02-2020 18:32:21”，“ name”：“ Aida”，“ age”：“ 22”]，[“ transactionTime”：“ 02-02-2013 10:32:41“，” name“：” Atiqah“，” age“：” 23“]，[” transactionTime“：” 01-02-2011 12:32:39“，” name“：” Auni“， “ age”：“ 24”]]

如何使用DateTime键（Swift 4）对NSDictionary数组进行排序？

1 个答案: