我有一个包含数据的数组,当通过firebase进行读取时,有时候数据会随着时间的推移而以适当的顺序随机进入。所以,需要使用排序方法在swift中使用Firebase SDK从snapshot.value获取字典排序数组3.1
Repsonse从snapshot.value排序我的本地阵列:
Optional({
Images = {
"-KmRCabAyzoVNMD06Hpr" = {
UploadTime = 1497269431993;
imageUrl = "https://firebasestorage.googleapis.com/v0/b/mychat-1147d.appspot.com/o/Images%2FwRHmnmfu3CeqXa77YgHEWVXI1AI3%2F518962226641.jpg?alt=media&token=645878ac-1124-44b0-8203-75e94813ca76";
};
"-KmRCnYSsjJaZ3RINRDG" = {
UploadTime = 1497269484338;
imageUrl = "https://firebasestorage.googleapis.com/v0/b/mychat-1147d.appspot.com/o/Images%2FwRHmnmfu3CeqXa77YgHEWVXI1AI3%2F518962275721.jpg?alt=media&token=d0113b12-531c-48a5-838b-02f96396a6df";
};
"-KmRCweslwMPBt0aCBIc" = {
UploadTime = 1497269521676;
imageUrl = "https://firebasestorage.googleapis.com/v0/b/mychat-1147d.appspot.com/o/Images%2FwRHmnmfu3CeqXa77YgHEWVXI1AI3%2F518962317708.jpg?alt=media&token=e931d9b3-5635-4e2f-a597-2c60aa25b38d";
};
"-KmRD13t3pI21ci45LEv" = {
UploadTime = 1497269544342;
imageUrl = "https://firebasestorage.googleapis.com/v0/b/mychat-1147d.appspot.com/o/Images%2FwRHmnmfu3CeqXa77YgHEWVXI1AI3%2F518962340349.jpg?alt=media&token=a738df76-e00b-48c2-9983-1e902e285a5f";
};
"-KmRD6WfaNTgKaVhy_Iq" = {
UploadTime = 1497269566141;
imageUrl = "https://firebasestorage.googleapis.com/v0/b/mychat-1147d.appspot.com/o/Images%2FwRHmnmfu3CeqXa77YgHEWVXI1AI3%2F518962359997.jpg?alt=media&token=5828ee44-1721-4267-99d7-91f10381aa13";
};
"-KmREsVwMb4sY6yN4pNK" = {
UploadTime = 1497270028928;
imageUrl = "https://firebasestorage.googleapis.com/v0/b/mychat-1147d.appspot.com/o/Images%2FwRHmnmfu3CeqXa77YgHEWVXI1AI3%2F518962824146.jpg?alt=media&token=aa0383c7-7d26-4b7a-b9bb-dbb1da3cdfff";
};
};
UserInfo = {
UserID = wRHmnmfu3CeqXa77YgHEWVXI1AI3;
userName = "Aric D'sooza";
};
})
我需要根据UploadTime这个数组排序。
我已经试过这样:
let sortedArray = (myArray).sorted(by: { (dictOne, dictTwo) -> Bool in
let d1 = dictOne["UploadTime"]! as! Double
let d2 = dictTwo["UploadTime"]! as! Double
return d1 < d2
})
print("Sorted Array - %@",sortedArray)
}
,也试过:
self.sortedArray = (myArray as NSArray).sortedArray(using: [NSSortDescriptor(key: "UploadTime", ascending: true)]) as! [[String:AnyObject]]
您的JSON是不正确的格式,你可以共享有效的JSON还有你试过的代码 –
我编辑了我的问题。 –
键'Images'的值是一个字典。字典根据定义是无序的。 – vadian