我如何根据 swiftyJson 获取的 json 在 swift 中创建我的 class 的对象?
how can I create objects of my class in swift based on json fetched by swiftyJson?
我有一个class如下:
import Foundation
import MapKit
class SingleRequest: NSObject, MKAnnotation {
var title: String?
let created: String
let discipline: String
let coordinate: CLLocationCoordinate2D
var items = NSMutableArray()
init(title: String, created: String, discipline: String, coordinate: CLLocationCoordinate2D) {
self.title = title
self.created = created
self.discipline = discipline
self.coordinate = coordinate
super.init()
}
}
我还有一个 json 看起来像:
[{"_id":"56c9d44fbcb42e075f7d49b1",
"username":"Ms. Brynlee Quitzon DDS",
"photo":"photo.jpg",
"number":"one",
"description":"Maiores rerum beatae molestiae autem. Voluptatem magni aspernatur est voluptas.",
"__v":0,
"updated_at":"2016-02-21T15:14:23.123Z",
"created_at":"2016-02-21T15:14:23.116Z",
"location":{
"type":"Point",
"coordinates":[5.300567929507009,44.04127433959841]}
},
etc.
现在我想获取所有 json 条目并为每个条目创建 SingleRequest
对象。
到目前为止我在这个 class:
中创建了一个方法
class func getAllRequests() {
print("getAllRequests")
RestApiManager.sharedInstance.getRequests { json in
let results = json//["username"]
for (index: String, subJson: JSON) in results {
let user: AnyObject = JSON.object
var title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
let latitude = (user[""]).doubleValue
let longitude = (user[""]).doubleValue
let coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
return SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate)
}
}
}
现在有 2 个问题:
1) 正如您在上面看到的,我将这两个字段留空:
let latitude = (user[""]).doubleValue
let longitude = (user[""]).doubleValue
那是因为我不知道如何从我的 json 中引用 long/lat 值,因为它们嵌入在 coordinates
字段中...
如何填写?
2) 这个函数会创建需要的对象吗?或者我应该例如更改声明以标记一些 return 值:
class func getAllRequests()
?谢谢!
var singleRequestsArray = [SingleRequest]()
class func getAllRequests() {
RestApiManager.sharedInstance.getRequests { json in
for (index: String, subJson: JSON) in son {
let user: AnyObject = subjson.object
let title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
var coordinate = CLLocationCoordinate2D()
if let coordinates = user["coordinates"].array{
let latitude = coordinates.first?).doubleValue
let longitude = coordinates.array.last?).doubleValue
coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
}
singleRequestsArray.append(SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate))
}
}
}
希望对您有所帮助!
对于你的第一个问题,你需要先从user["coordinates"]
中取出数组,然后将其向下转换为Array,user["coordinates"] as? Array<Double>
你的第二个问题,应该return一个SingleRequest数组,Array<SingleRequest>
class func getAllRequests() -> Array<SingleRequest> {
var requests: Array<SingleRequest> = []
RestApiManager.sharedInstance.getRequests { json in
let results = json//["username"]
for (index: String, subJson: JSON) in results {
let user: AnyObject = JSON.object
var title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
guard let coordinates = user["coordinates"] as? Array<Double> else { print("no lat/long") }
let latitude = coordinates[0]
let longitude = coordinates[1]
let coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
requests.append(SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate))
}
}
return requests
}
我有一个class如下:
import Foundation
import MapKit
class SingleRequest: NSObject, MKAnnotation {
var title: String?
let created: String
let discipline: String
let coordinate: CLLocationCoordinate2D
var items = NSMutableArray()
init(title: String, created: String, discipline: String, coordinate: CLLocationCoordinate2D) {
self.title = title
self.created = created
self.discipline = discipline
self.coordinate = coordinate
super.init()
}
}
我还有一个 json 看起来像:
[{"_id":"56c9d44fbcb42e075f7d49b1",
"username":"Ms. Brynlee Quitzon DDS",
"photo":"photo.jpg",
"number":"one",
"description":"Maiores rerum beatae molestiae autem. Voluptatem magni aspernatur est voluptas.",
"__v":0,
"updated_at":"2016-02-21T15:14:23.123Z",
"created_at":"2016-02-21T15:14:23.116Z",
"location":{
"type":"Point",
"coordinates":[5.300567929507009,44.04127433959841]}
},
etc.
现在我想获取所有 json 条目并为每个条目创建 SingleRequest
对象。
到目前为止我在这个 class:
中创建了一个方法class func getAllRequests() {
print("getAllRequests")
RestApiManager.sharedInstance.getRequests { json in
let results = json//["username"]
for (index: String, subJson: JSON) in results {
let user: AnyObject = JSON.object
var title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
let latitude = (user[""]).doubleValue
let longitude = (user[""]).doubleValue
let coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
return SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate)
}
}
}
现在有 2 个问题:
1) 正如您在上面看到的,我将这两个字段留空:
let latitude = (user[""]).doubleValue
let longitude = (user[""]).doubleValue
那是因为我不知道如何从我的 json 中引用 long/lat 值,因为它们嵌入在 coordinates
字段中...
如何填写?
2) 这个函数会创建需要的对象吗?或者我应该例如更改声明以标记一些 return 值:
class func getAllRequests()
?谢谢!
var singleRequestsArray = [SingleRequest]()
class func getAllRequests() {
RestApiManager.sharedInstance.getRequests { json in
for (index: String, subJson: JSON) in son {
let user: AnyObject = subjson.object
let title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
var coordinate = CLLocationCoordinate2D()
if let coordinates = user["coordinates"].array{
let latitude = coordinates.first?).doubleValue
let longitude = coordinates.array.last?).doubleValue
coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
}
singleRequestsArray.append(SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate))
}
}
}
希望对您有所帮助!
对于你的第一个问题,你需要先从user["coordinates"]
中取出数组,然后将其向下转换为Array,user["coordinates"] as? Array<Double>
你的第二个问题,应该return一个SingleRequest数组,Array<SingleRequest>
class func getAllRequests() -> Array<SingleRequest> {
var requests: Array<SingleRequest> = []
RestApiManager.sharedInstance.getRequests { json in
let results = json//["username"]
for (index: String, subJson: JSON) in results {
let user: AnyObject = JSON.object
var title = user["description"]
let created = user["created_at"]
let discipline = user["number"]
guard let coordinates = user["coordinates"] as? Array<Double> else { print("no lat/long") }
let latitude = coordinates[0]
let longitude = coordinates[1]
let coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
requests.append(SingleRequest(title: title, created: created!, discipline: discipline!, coordinate: coordinate))
}
}
return requests
}