根據特定鍵在swift3中對字典進行排序

Question

我從 API 收到以下響應，我需要根據 displayOrder 鍵對這個字典進行排序。 因此，根據下面的代碼，您可以看到當前的訂單是 [SALE, OFFER, DISCOUNT, SOLD]，我想按照 [SALE, SOLD, OFFER, DISCOUNT] 的順序排列。

["SALE": {
    displayOrder = 1;
    segId = 2;
    chg = 2;
}, "OFFER": {
    displayOrder = 3;
    segId = 4;
    chg = 2;
}, "DISCOUNT": {
    displayOrder = 4;
    segId = 1;
    chg = 1;
}, "SOLD": {
    displayOrder = 2;
    segId = 2;
    chg = 1;
}]

Answer 1

使用sorted函數對其進行簡單排序，例如：

let dic = ["SALE": [
    "displayOrder" : 1,
    "segId" : 2,
    "chg" : 2,
    ], "OFFER": [
        "displayOrder" : 3,
        "segId" : 4,
        "chg" : 2,
    ], "DISCOUNT": [
        "displayOrder" : 4,
        "segId" : 1,
        "chg" : 1,
    ], "SOLD": [
        "displayOrder" : 2,
        "segId" : 2,
        "chg" : 1,
    ]]

dic.sorted { (lhs, rhs) -> Bool in
    lhs.value["displayOrder"]! < rhs.value["displayOrder"]!
}