无法从嵌套的json swift获取数据
我正在学习快速。
我有一个来自服务器的json。
<div id=\"tps_nav_upper_1785\" class=\"theiaPostSlider_nav _right fontTheme _upper\"><div class=\"_buttons\"><span class=\"_button _prev _another_post _disabled\"><span class=\"_1\"></span><span class=\"_2\" ><span aria-hidden=\"true\" class=\"tps-icon-chevron-circle-left\"></span></span><span class=\"_3\">Anterior</span></span><span class=\"_text\">1 de 15</span><a href=\"https://litoralmagazine.com/testemunhos-litoral-awards/2/\" class=\"_button _next\"><span class=\"_1\">Seguinte</span><span class=\"_2\" ><span aria-hidden=\"true\" class=\"tps-icon-chevron-circle-right\"></span></span><span class=\"_3\"></span></a></div><div class=\"_title\"><span class=\"_helper\"></span></div></div><div id=\"tps_slideContainer_1785\" class=\"theiaPostSlider_slides\"><div>\n\n<div id=\"attachment_1958\" style=\"width: 210px\" class=\"wp-caption alignleft\"><img class=\"wp-image-1958 size-medium\" src=\"https://litoralmagazine.com/wp-content/uploads/2014/11/ribau-esteves-200x300.jpg\" alt=\"ribau-esteves\" width=\"200\" height=\"300\" srcset=\"https://litoralmagazine.com/wp-content/uploads/2014/11/ribau-esteves-200x300.jpg 200w, https://litoralmagazine.com/wp-content/uploads/2014/11/ribau-esteves-600x900.jpg 600w, https://litoralmagazine.com/wp-content/uploads/2014/11/ribau-esteves.jpg 601w\" sizes=\"(max-width: 200px) 100vw, 200px\" /><p class=\"wp-caption-text\">Ribau Esteves – Presidente da Câmara Municipal de Aveiro</p></div>\n<p style=\"text-align: left;\">A edição de 2015 da Gala Litoral Awards marcou a agenda do município e da região de Aveiro, num exercício elegante e justo que reconhece e motiva todos para fazermos mais e melhor pela vida, pelas empresas, pelos municípios, pela região e pelas pessoas. Fazer muito e bem tem de ser, cada vez mais, uma tarefa importante e permanente. Reconhecer e premiar o mérito são atos nobres e necessários, para que juntos possamos continuar a crescer.</p>\n<h6 style=\"text-align: left;\">\n\n</div></div><div id=\"tps_nav_lower_1785\" class=\"theiaPostSlider_nav _right fontTheme _lower\"><div class=\"_buttons\"><span class=\"_button _prev _another_post _disabled\"><span class=\"_1\"></span><span class=\"_2\" ><span aria-hidden=\"true\" class=\"tps-icon-chevron-circle-left\"></span></span><span class=\"_3\">Anterior</span></span><span class=\"_text\">1 de 15</span><a href=\"https://litoralmagazine.com/testemunhos-litoral-awards/2/\" class=\"_button _next\"><span class=\"_1\">Seguinte</span><span class=\"_2\" ><span aria-hidden=\"true\" class=\"tps-icon-chevron-circle-right\"></span></span><span class=\"_3\"></span></a></div><div class=\"_title\"><span class=\"_helper\"></span></div></div><div class=\"theiaPostSlider_footer _footer\"></div><p><!-- END THEIA POST SLIDER --></p>\n\n <script type='text/javascript'>\n \n var tpsInstance;\n var tpsOptions = {\"slideContainer\":\"#tps_slideContainer_1785\",\"nav\":[\".theiaPostSlider_nav\"],\"navText\":\"%{currentSlide} de %{totalSlides}\",\"helperText\":\"\",\"defaultSlide\":0,\"transitionEffect\":\"slide\",\"transitionSpeed\":400,\"keyboardShortcuts\":true,\"scrollAfterRefresh\":true,\"numberOfSlides\":15,\"slides\":[],\"useSlideSources\":true,\"themeType\":\"font\",\"prevText\":\"Anterior\",\"nextText\":\"Seguinte\",\"buttonWidth\":\"0\",\"buttonWidth_post\":\"0\",\"postUrl\":\"https:\\/\\/litoralmagazine.com\\/testemunhos-litoral-awards\\/\",\"postId\":1785,\"refreshAds\":false,\"refreshAdsEveryNSlides\":\"1\",\"adRefreshingMechanism\":\"javascript\",\"siteUrl\":\"https:\\/\\/litoralmagazine.com\",\"loopSlides\":false,\"scrollTopOffset\":\"0\",\"prevFontIcon\":\"<span aria-hidden=\\\"true\\\" class=\\\"tps-icon-chevron-circle-left\\\"><\\/span>\",\"nextFontIcon\":\"<span aria-hidden=\\\"true\\\" class=\\\"tps-icon-chevron-circle-right\\\"><\\/span>\"};\n \n (function ($) {\n $(document).ready(function () {\n \n tpsInstance = new tps.createSlideshow(tpsOptions);\n });\n }(jQuery));\n </script>\n
我无法解析此json并从lat和lon中获取数据以及从供应商处获取名称。
我的url方法和for循环如何从循环中准确地获取经度和纬度并将其放在地图上？
我的视图确实加载了方法
[
{
"dId": 1,
"vendor": {
"vendorId": 1,
"name": "Gems",
"about": "Get Good quality stones",
"address": "JacksonVille Road",
"latitude": 12.232323,
"longitude": 77.230802,
},
"name": "Gems Delight",
}
]
请帮助我，因为我正在学习编写代码，代码可能不正确，请不要介意并将经纬度和经度数据加载到地图上。我应该构造一个对象并将其放在那里吗？
override func viewDidLoad() {
super.viewDidLoad()
guard let gitUrl = URL(string: "localhost:8080/deals") else { return }
URLSession.shared.dataTask(with: gitUrl) { (data, response
, error) in
guard let data = data else { return }
do {
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers)
var lat:Double
var lon:Double
var nam = ""
for items in json as! [AnyObject]{
// let te = type(of: items)
// print(te)
let new = items["vendor"]
for (it,key) in new as! [String:Any]{
// print(it,key)
// print(it["longitude"])
if it == "longitude"{
print(it,key)
lon = key as! Double
}
if it == "latitude"{
print(it,key)
lat = key as! Double
}
if it == "name"{
nam = key as! String
}
if (nam.isEmpty == false){
print("falsdalsdasldasd")
self.locationManager.delegate = self
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
let camera = GMSCameraPosition.camera(withLatitude:lat, longitude:lon, zoom: 4.0)
let subView = GMSMapView.map(withFrame: self.view.bounds,camera:camera)
let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude:lat, longitude:lon)
marker.title = nam
// marker.snippet = "Australia"
marker.map = subView
self.mapView.addSubview(subView)
}
// print(it["longitude"])
}
// let te = type(of: items)
// for it in new as![AnyObject]{
//// print(it"])
// print(it)
//
// }
// print(items["vendor"].["latitude"])
// print(items.vendor)
// print(items[""])
// let nam = items["name"];
// let desc = items["description"];
// self.locationNames.append(nam as! String)
// self.locationDescription.append(desc as! String)
//
}
// self.colecVw.delegate = self
// self.colecVw.dataSource = self
// self.colecVw.reloadData()
// }
} catch let err {
print("Err", err)
}
}.resume()
print("coming here")
// Create a GMSCameraPosition that tells the map to display the
// coordinate -33.86,151.20 at zoom level 6.
// let mapView = GMSMapView(frame: CGRect(x: 0, y: 64, width: self.currentDeviceSize.width, height: self.bottomBgView.frame.minY - 64))
// view = mapView
//
// // Creates a marker in the center of the map.
// let marker = GMSMarker()
// marker.position = CLLocationCoordinate2D(latitude: -33.86, longitude: 151.20)
// marker.title = "Sydney"
// marker.snippet = "Australia"
// marker.map = mapView
}
这是我从代码中得到的错误。
3 个答案:
答案 0 :(得分：3)
发生错误是因为lat和lon 必须在行中具有值
let camera = GMSCameraPosition.camera(withLatitude:lat, longitude:lon, zoom: 4.0)
如果key比较失败，则不能保证。
如果你写的话，条件就满足了
var lat = 0.0 // The type Double is inferred
var lon = 0.0
但不是枚举字典，而是通过可选绑定直接安全地获取键的值
do {
// no mutableContainers !!
let json = try JSONSerialization.jsonObject(with: data) as! [[String:Any]]
for item in json {
if let vendor = item["vendor"] as? [String:Any],
let lat = vendor["latitude"] as? Double,
let lon = vendor["longitude"] as? Double,
let name = item["name"] as? String, !name.isEmpty {
print("falsdalsdasldasd")
// self.locationManager.delegate = self
// self.locationManager.requestWhenInUseAuthorization()
// self.locationManager.startUpdatingLocation()
let camera = GMSCameraPosition.camera(withLatitude:lat, longitude:lon, zoom: 4.0)
let subView = GMSMapView.map(withFrame: self.view.bounds,camera:camera)
let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude:lat, longitude:lon)
marker.title = name
marker.map = subView
self.mapView.addSubview(subView)
}
}
} catch {
print("Err", error)
}
在每次迭代中调用LocationManager方法是没有意义的。在viewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager.delegate = self
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
...
答案 1 :(得分：1)
您可以尝试
struct Root: Codable {
let dID: Int
let vendor: Vendor
let name: String
enum CodingKeys: String, CodingKey {
case dID = "dId"
case vendor, name
}
}
struct Vendor: Codable {
let vendorID: Int
let name, about, address: String
let latitude, longitude: Double
enum CodingKeys: String, CodingKey {
case vendorID = "vendorId"
case name, about, address, latitude, longitude
}
}
-
let arr = try? JSONDecoder().decode([Root].self, from:data)
print(arr?.forEach {$0.vendor.latitude })
答案 2 :(得分：0)
看到这个
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers)
将json传递给
if let data = json as? NSArray {
for data in data {
if let data = data as? [String: AnyObject] {
let dataID = data["dId"] as? Int
if let data = data[“vendor”] as? [String: AnyObject] {
let vendorID = data["vendorId"] as? Int
}
}
}
}
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？