Question

我有这样的JSON：

{
    "SKzSjdBuOpO49wkPVaxtmLQoR0O2": {
        location: "-LB1fn5GQKTaIc-fGNPS"
    }, 
    "s0ntSZP7mBQw1a8ua0E5PqazlqJ2": {
        location: "-LB23izD7bp2NhO0UuIo"
    }, 
    "FEScjelpNSR7vuVz1ha6Z6uSfF43": {
        location: "-LB1JLABuJO1NyJ-v2t_"
    }, 
    "mW7dGja6cRRB0d9uSIhg4f35PzC3": {
        location: "-LB5xqUvIjEgtW_FH_nG"
    }, 
    "GCnt0VKcqjT8bl2chw43nsntaZK2": {
        location: "-LB1n8ga9C0vCcZXD2Us"
    }
}

在我的Values[String: Any]字典中。我想从其值创建另一个字典来访问位置值。你能帮我这么做吗？

Answer 1

尽量不要在swift中使用Dictionary，而在您的情况下，您可以使用[String : [String: String]]类型，然后遍历您的数据以获取所需的值。试试这个

  let dict = ["SKzSjdBuOpO49wkPVaxtmLQoR0O2": [
        "location" : "-LB1fn5GQKTaIc-fGNPS",
        ], "s0ntSZP7mBQw1a8ua0E5PqazlqJ2": [
            "location" : "-LB23izD7bp2NhO0UuIo",
        ], "FEScjelpNSR7vuVz1ha6Z6uSfF43": [
            "location" : "-LB1JLABuJO1NyJ-v2t_",
        ], "mW7dGja6cRRB0d9uSIhg4f35PzC3": [
            "location" : "-LB5xqUvIjEgtW_FH_nG",
        ], "GCnt0VKcqjT8bl2chw43nsntaZK2": [
            "location" : "-LB1n8ga9C0vCcZXD2Us",
        ]]

    var newDict = [String: String]()
    for (key, val) in dict {
        newDict[key] = val["location"]
    }
    print(newDict)

输出：

[“SKzSjdBuOpO49wkPVaxtmLQoR0O2”：“ - LB1fn5GQKTaIc-fGNPS”， “s0ntSZP7mBQw1a8ua0E5PqazlqJ2”：“ - LB23izD7bp2NhO0UuIo”， “FEScjelpNSR7vuVz1ha6Z6uSfF43”：“ - LB1JLABuJO1NyJ-v2t_”， “mW7dGja6cRRB0d9uSIhg4f35PzC3”：“ - LB5xqUvIjEgtW_FH_nG”， “GCnt0VKcqjT8bl2chw43nsntaZK2”：“ - LB1n8ga9C0vCcZXD2Us”]

修改

对于你的情况，因为你有字典，你可以试试这个：

   let dict = ["SKzSjdBuOpO49wkPVaxtmLQoR0O2": [
        "location" : "-LB1fn5GQKTaIc-fGNPS",
        ], "s0ntSZP7mBQw1a8ua0E5PqazlqJ2": [
            "location" : "-LB23izD7bp2NhO0UuIo",
        ], "FEScjelpNSR7vuVz1ha6Z6uSfF43": [
            "location" : "-LB1JLABuJO1NyJ-v2t_",
        ], "mW7dGja6cRRB0d9uSIhg4f35PzC3": [
            "location" : "-LB5xqUvIjEgtW_FH_nG",
        ], "GCnt0VKcqjT8bl2chw43nsntaZK2": [
            "location" : "-LB1n8ga9C0vCcZXD2Us",
        ]] as Dictionary<String, Any>

    var newDict = [String: String]()
    for (key, val) in dict {
        if let value = val as? [String: String] {
            newDict[key] = value["location"]
        }
    }
    print(newDict)

Answer 2

如果主要目标只是访问值并且类型固定为[String: Any]，请执行以下操作：

if let info = dictionary["SKzSjdBuOpO49wkPVaxtmLQoR0O2"] as? [String : String] {
    let location = info["location"]
}

从另一个的值创建新的Dict

2 个答案:

修改