我正在使用Swift尝试访问JSON的“ locationConstraint”部分中的“ locations”对象，如下所示：
let jsonObj : [String: Any] =
[
"attendees": [
[
"type": "required",
"emailAddress": [
"name": nameOfRoom,
"address": roomEmailAddress
]
]
],
"locationConstraint": [
"isRequired": "true",
"suggestLocation": "false",
"locations": [
[
"displayName": "First Floor Test Meeting Room 1",
"locationEmailAddress": "FirstFloorTestMeetingRoom1@onmicrosoft.com"
],
[
"displayName": "Ground Floor Test Meeting Room 1",
"locationEmailAddress": "GroundFloorTestMeetingRoom1@onmicrosoft.com"
]
//and the rest of the rooms below this..
]
],
"meetingDuration": durationOfMeeting,
]
我正在尝试从此方法之外将项目添加到位置（以防止重复代码，因为位置列表可能很大）-但是在替换回json的这一部分时遇到问题。
我这样做的方法：
static func setupJsonObjectForFindMeetingTimeAllRoomsTest(nameOfRoom: String, roomEmailAddress: String, dateStartString: String, dateEndString: String, durationOfMeeting: String, locations: [String]) -> [String: Any] {
let jsonObj : [String: Any] =
[
"attendees": [
[
"type": "required",
"emailAddress": [
"name": nameOfRoom,
"address": roomEmailAddress
]
]
],
"meetingDuration": durationOfMeeting
]
let jsonObject = addLocationsToExistingJson(locations:locations, jsonObj: jsonObj)
return jsonObject
}
以及将位置添加到现有json对象的方法：
static func addLocationsToExistingJson(locations: [String], jsonObj: [String: Any]) -> [String: Any] {
var data: [String: Any] = jsonObj
let locConstraintObj = [
"isRequired": "true",
"suggestLocation": "false",
"locations" : []
] as [String : Any]
//try access locationConstraint part of json
data["locationConstraint"] = locConstraintObj
for i in stride(from: 0, to: locations.count, by: 1) {
let item: [String: Any] = [
"displayName": locations[i],
"locationEmailAddress": locations[i]
]
// get existing items, or create new array if doesn't exist
//this line below wrong? I need to access data["locationConstraint]["locations"]
//but an error occurs when i change to the above.. .how do i access it?
var existingItems = data["locations"] as? [[String: Any]] ?? [[String: Any]]()
// append the item
existingItems.append(item)
// replace back into `data`
data["locations"] = existingItems
}
return data
}
因此，最终，我可以工作的最终json对象应如下所示：
[“ meetingDuration”：“ PT60M”，“ returnSuggestionReasons”：“ true”， “与会者”：[[“电子邮件地址”：[“地址”： “ TestUser6@qubbook.onmicrosoft.com”，“名称”：“ N”]，“类型”： “” required“]]，” minimumAttendeePercentage“：” 100“， “ locationConstraint”：[“ locations”：[[“ displayName”：“二楼测试 会议室1”，“ locationEmailAddress”： “” FirstFloorTestMeetingRoom1@qubbook.onmicrosoft.com“]，[” displayName“： “底层测试会议室1”，“ locationEmailAddress”： “” GroundFloorTestMeetingRoom1@qubbook.onmicrosoft.com“]]， “ suggestLocation”：“ false”，“ isRequired”：“ true”]，“ timeConstraint”： [“ activityDomain”：“ unrestricted”，“ timeslots”：[[“ start”： [“ dateTime”：“ 2019-02-07 14:30:00”，“ timeZone”：“ UTC”]，“ end”： [“ dateTime”：“ 2019-02-07 15:30:00”，“ timeZone”：“ UTC”]]]]]， “ isOrganizerOptional”：“ true”]
如下所示：
[“ timeConstraint”：[“ activityDomain”：“ unrestricted”，“ timeslots”： [[“开始”：[“ dateTime”：“ 2019-02-08 08:30:00”，“ timeZone”：“ UTC”]， “ end”：[“ dateTime”：“ 2019-02-08 09:30:00”，“ timeZone”：“ UTC”]]]]]， “ locationConstraint”：[“ suggestLocation”：“ false”，“ locations”：[]， “ isRequired”：“ true”]，“参加者”：[[“ emailAddress”：[“ address”： “ TestUser6@qubbook.onmicrosoft.com”，“名称”：“ N”]，“类型”： [required]]]，“ returnSuggestionReasons”：“ true”， “ isOrganizerOptional”：“ true”，“ minimumAttendeePercentage”：“ 100”， “ locations”：[[“” locationEmailAddress“： “ FirstFloorTestMeetingRoom1@qubbook.onmicrosoft.com”，“ displayName”： “” FirstFloorTestMeetingRoom1@qubbook.onmicrosoft.com“]， [“ locationEmailAddress”： “ GroundFloorTestMeetingRoom1@qubbook.onmicrosoft.com”，“ displayName”： “” GroundFloorTestMeetingRoom1@qubbook.onmicrosoft.com“]]， “ meetingDuration”：“ PT60M”]
将location对象添加到JSON的locationConstraint部分之外的地方。我知道我需要像这样访问我的json的locationConstraint部分：var existingItems = data["locationConstraint"]!["locations"] as? [[String: Any]] ?? [[String: Any]]()，但这会返回错误：
“任意”类型没有下标成员
这是我第一次使用JSON，并试图快速对其进行操作。我将如何解决此问题？
答案 0 :(得分：1)
按照trojanfoe的建议，您应该使用模型对象并直接对其进行操作。
import Foundation
struct Meeting: Codable {
var attendees: [Attendee]
var locationConstraint: LocationConstraint
var meetingDuration: Int
}
struct Attendee: Codable {
var type: Type
var emailAddress: EmailAdress
enum `Type`: String, Codable {
case required
}
}
struct LocationConstraint: Codable {
var isRequired: Bool
var suggestLocation: Bool
var locations: [Location]
}
struct EmailAdress: Codable {
var name: String
var address: String
}
struct Location: Codable {
var displayName: String
var locationEmailAddress: String
}
首先我们带上您的字典...
let jsonDict: [String: Any] =
[
"attendees": [
[
"type": "required",
"emailAddress": [
"name": "specificName",
"address": "specificAdress"
]
]
],
"locationConstraint": [
"isRequired": true,
"suggestLocation": false,
"locations": [
[
"displayName": "First Floor Test Meeting Room 1",
"locationEmailAddress": "FirstFloorTestMeetingRoom1@onmicrosoft.com"
],
[
"displayName": "Ground Floor Test Meeting Room 1",
"locationEmailAddress": "GroundFloorTestMeetingRoom1@onmicrosoft.com"
]
]
],
"meetingDuration": 1800,
]
...并对其进行序列化。
let jsonData = try JSONSerialization.data(withJSONObject: jsonDict, options: .prettyPrinted)
print(String(data: jsonData, encoding: String.Encoding.utf8))
然后我们将其解码为会议模型。
var meeting = try JSONDecoder().decode(Meeting.self, from: jsonData)
我们初始化一个新位置，并将其附加到我们的Meeting.locationConstraints.locations数组中。
let newLocation = Location(displayName: "newDisplayName", locationEmailAddress: "newLocationEmailAdress")
meeting.locationConstraint.locations.append(newLocation)
最后再次重新编码我们的模型对象。
let updatedJsonData = try JSONEncoder().encode(meeting)
print(String(data: updatedJsonData, encoding: String.Encoding.utf8))