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[英]How do I create an array of objects based on array of JSON objects using SwiftyJSON (in Swift)?
[英]how can I create objects of my class in swift based on json fetched by swiftyJson?
我的課如下:
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()
}
}
我也有一個看起來像的json:
[{"_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.
現在,我想獲取所有json條目並為每個條目創建SingleRequest
對象。
到目前為止,我在此類中創建了一個方法:
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)
}
}
}
現在有兩個問題:
1)如上所示,我將這兩個字段留為空白:
let latitude = (user[""]).doubleValue
let longitude = (user[""]).doubleValue
那是因為我不知道如何從我的json引用long / lat值,因為它們嵌入在coordinates
字段中...
我該如何填充?
2)這個函數會創建所需的對象嗎? 或者我應該例如更改聲明以標記一些返回值:
class func getAllRequests()
? 謝謝!
對於第一個問題,您首先需要從user["coordinates"]
取出數組,然后將其向下轉換為Array, user["coordinates"] as? Array<Double>
user["coordinates"] as? Array<Double>
對於第二個問題,它應該返回SingleRequest 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
}
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))
}
}
}
希望這個能對您有所幫助!
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